zuul/nodepool
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Reorganize drivers into separate documents

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Change-Id: I4274d8d87058a2a5c91da3e994a32d61b2f2aafe
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Albin Vass 2020-11-10 21:51:31 +01:00
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.. _aws-driver:
.. default-domain:: zuul
AWS EC2 Driver
--------------
Selecting the aws driver adds the following options to the :attr:`providers`
section of the configuration.
.. attr-overview::
:prefix: providers.[aws]
:maxdepth: 3
.. attr:: providers.[aws]
:type: list
An AWS provider's resources are partitioned into groups called `pool`
(see :attr:`providers.[aws].pools` for details), and within a pool,
the node types which are to be made available are listed
(see :attr:`providers.[aws].pools.labels` for details).
See `Boto Configuration`_ for information on how to configure credentials
and other settings for AWS access in Nodepool's runtime environment.
.. note:: For documentation purposes the option names are prefixed
``providers.[aws]`` to disambiguate from other
drivers, but ``[aws]`` is not required in the
configuration (e.g. below
``providers.[aws].pools`` refers to the ``pools``
key in the ``providers`` section when the ``aws``
driver is selected).
Example:
.. code-block:: yaml
providers:
- name: ec2-us-west-2
driver: aws
region-name: us-west-2
cloud-images:
- name: debian9
image-id: ami-09c308526d9534717
username: admin
pools:
- name: main
max-servers: 5
subnet-id: subnet-0123456789abcdef0
security-group-id: sg-01234567890abcdef
labels:
- name: debian9
cloud-image: debian9
instance-type: t3.medium
iam-instance-profile:
arn: arn:aws:iam::123456789012:instance-profile/s3-read-only
key-name: zuul
tags:
key1: value1
- name: debian9-large
cloud-image: debian9
instance-type: t3.large
key-name: zuul
tags:
key1: value1
key2: value2
.. attr:: name
:required:
A unique name for this provider configuration.
.. attr:: region-name
:required:
Name of the `AWS region`_ to interact with.
.. attr:: profile-name
The AWS credentials profile to load for this provider. If unspecified the
`boto3` library will select a profile.
See `Boto Configuration`_ for more information.
.. attr:: boot-timeout
:type: int seconds
:default: 60
Once an instance is active, how long to try connecting to the
image via SSH. If the timeout is exceeded, the node launch is
aborted and the instance deleted.
.. attr:: launch-retries
:default: 3
The number of times to retry launching a node before considering
the job failed.
.. attr:: cloud-images
:type: list
Each entry in this section must refer to an entry in the
:attr:`labels` section.
.. code-block:: yaml
cloud-images:
- name: ubuntu1804
image-id: ami-082fd9a18128c9e8c
username: ubuntu
- name: ubuntu1804-by-filters
image-filters:
- name: name
values:
- named-ami
username: ubuntu
- name: my-custom-win2k3
connection-type: winrm
username: admin
Each entry is a dictionary with the following keys
.. attr:: name
:type: string
:required:
Identifier to refer this cloud-image from :attr:`providers.[aws].pools.labels` section.
Since this name appears elsewhere in the nodepool configuration file,
you may want to use your own descriptive name here and use
``image-id`` to specify the cloud image so that if
the image id changes on the cloud, the impact to your Nodepool
configuration will be minimal. However, if ``image-id`` is not
provided, this is assumed to be the image id in the cloud.
.. attr:: image-id
:type: str
If this is provided, it is used to select the image from the cloud
provider by ID.
.. attr:: image-filters
:type: list
If provided, this is used to select an AMI by filters. If the filters
provided match more than one image, the most recent will be returned.
`image-filters` are not valid if `image-id` is also specified.
Each entry is a dictionary with the following keys
.. attr:: name
:type: str
:required:
The filter name. See `Boto describe images`_ for a list of valid filters.
.. attr:: values
:type: list
:required:
A list of str values to filter on
.. attr:: username
:type: str
The username that a consumer should use when connecting to the node.
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: connection-type
:type: str
The connection type that a consumer should use when connecting to the
node. For most images this is not necessary. However when creating
Windows images this could be 'winrm' to enable access via ansible.
.. attr:: connection-port
:type: int
:default: 22/ 5986
The port that a consumer should use when connecting to the node. For
most diskimages this is not necessary. This defaults to 22 for ssh and
5986 for winrm.
.. attr:: pools
:type: list
A pool defines a group of resources from an AWS provider. Each pool has a
maximum number of nodes which can be launched from it, along with a number
of cloud-related attributes used when launching nodes.
.. attr:: name
:required:
A unique name within the provider for this pool of resources.
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: subnet-id
If provided, specifies the subnet to assign to the primary network
interface of nodes.
.. attr:: security-group-id
If provided, specifies the security group ID to assign to the primary
network interface of nodes.
.. attr:: public-ip-address
:type: bool
:default: True
Specify if a public ip address shall be attached to nodes.
.. attr:: host-key-checking
:type: bool
:default: True
Specify custom behavior of validation of SSH host keys. When set to
False, nodepool-launcher will not ssh-keyscan nodes after they are
booted. This might be needed if nodepool-launcher and the nodes it
launches are on different networks. The default value is True.
.. attr:: labels
:type: list
Each entry in a pool's `labels` section indicates that the
corresponding label is available for use in this pool. When creating
nodes for a label, the flavor-related attributes in that label's
section will be used.
.. code-block:: yaml
labels:
- name: bionic
instance-type: m5a.large
Each entry is a dictionary with the following keys
.. attr:: name
:type: str
:required:
Identifier to refer this label.
Nodepool will use this to set the name of the instance unless
the name is specified as a tag.
.. attr:: cloud-image
:type: str
:required:
Refers to the name of an externally managed image in the
cloud that already exists on the provider. The value of
``cloud-image`` should match the ``name`` of a previously
configured entry from the ``cloud-images`` section of the
provider. See :attr:`providers.[aws].cloud-images`.
.. attr:: ebs-optimized
:type: bool
:default: False
Indicates whether EBS optimization
(additional, dedicated throughput between Amazon EC2 and Amazon EBS,)
has been enabled for the instance.
.. attr:: instance-type
:type: str
:required:
Name of the flavor to use.
.. attr:: iam-instance-profile
:type: dict
Used to attach an iam instance profile.
Useful for giving access to services without needing any secrets.
.. attr:: name
Name of the instance profile.
Mutually exclusive with :attr:`providers.[aws].pools.labels.iam-instance-profile.arn`
.. attr:: arn
ARN identifier of the profile.
Mutually exclusive with :attr:`providers.[aws].pools.labels.iam-instance-profile.name`
.. attr:: key-name
:type: string
:required:
The name of a keypair that will be used when
booting each server.
.. attr:: volume-type
:type: string
If given, the root `EBS volume type`_
.. attr:: volume-size
:type: int
If given, the size of the root EBS volume, in GiB.
.. attr:: userdata
:type: str
:default: None
A string of userdata for a node. Example usage is to install
cloud-init package on image which will apply the userdata.
Additional info about options in cloud-config:
https://cloudinit.readthedocs.io/en/latest/topics/examples.html
.. attr:: tags
:type: dict
:default: None
A dictionary of tags to add to the EC2 instances
.. _`EBS volume type`: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
.. _`AWS region`: https://docs.aws.amazon.com/general/latest/gr/rande.html
.. _`Boto configuration`: https://boto3.amazonaws.com/v1/documentation/api/latest/guide/configuration.html
.. _`Boto describe images`: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ec2.html#EC2.Client.describe_images

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.. _azure-driver:
.. default-domain:: zuul
Azure Compute Driver
--------------------
Selecting the azure driver adds the following options to the :attr:`providers`
section of the configuration.
.. attr-overview::
:prefix: providers.[azure]
:maxdepth: 3
.. attr:: providers.[azure]
:type: list
An Azure provider's resources are partitioned into groups called `pool`,
and within a pool, the node types which are to be made available are listed
.. note:: For documentation purposes the option names are prefixed
``providers.[azure]`` to disambiguate from other
drivers, but ``[azure]`` is not required in the
configuration (e.g. below
``providers.[azure].pools`` refers to the ``pools``
key in the ``providers`` section when the ``azure``
driver is selected).
Example:
.. code-block:: yaml
providers:
- name: azure-central-us
driver: azure
zuul-public-key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAA...
resource-group-location: centralus
location: centralus
resource-group: ZuulCIDev
auth-path: /Users/grhayes/.azure/nodepoolCreds.json
subnet-id: /subscriptions/<subscription-id>/resourceGroups/ZuulCI/providers/Microsoft.Network/virtualNetworks/NodePool/subnets/default
cloud-images:
- name: bionic
username: zuul
image-reference:
sku: 18.04-LTS
publisher: Canonical
version: latest
offer: UbuntuServer
pools:
- name: main
max-servers: 10
labels:
- name: bionic
cloud-image: bionic
hardware-profile:
vm-size: Standard_D1_v2
tags:
department: R&D
purpose: CI/CD
.. attr:: name
:required:
A unique name for this provider configuration.
.. attr:: location
:required:
Name of the Azure region to interact with.
.. attr:: resource-group-location
:required:
Name of the Azure region to where the home Resource Group is or should be created.
.. attr:: auth-path
:required:
Path to the JSON file containing the service principal credentials.
Create with the `Azure CLI`_ and the ``--sdk-auth`` flag
.. attr:: subnet-id
:required:
Subnet to create VMs on
.. attr:: cloud-images
:type: list
Each entry in this section must refer to an entry in the
:attr:`labels` section.
.. code-block:: yaml
cloud-images:
- name: bionic
username: zuul
image-reference:
sku: 18.04-LTS
publisher: Canonical
version: latest
offer: UbuntuServer
- name: windows-server-2016
username: zuul
image-reference:
sku: 2016-Datacenter
publisher: MicrosoftWindowsServer
version: latest
offer: WindowsServer
Each entry is a dictionary with the following keys
.. attr:: name
:type: string
:required:
Identifier to refer this cloud-image from :attr:`labels`
section. Since this name appears elsewhere in the nodepool
configuration file, you may want to use your own descriptive
name here.
.. attr:: username
:type: str
The username that a consumer should use when connecting to the
node.
.. attr:: image-reference
:type: dict
:required:
.. attr:: sku
:type: str
:required:
Image SKU
.. attr:: publisher
:type: str
:required:
Image Publisher
.. attr:: offer
:type: str
:required:
Image offers
.. attr:: version
:type: str
:required:
Image version
.. attr:: pools
:type: list
A pool defines a group of resources from an Azure provider. Each pool has a
maximum number of nodes which can be launched from it, along with a number
of cloud-related attributes used when launching nodes.
.. attr:: name
:required:
A unique name within the provider for this pool of resources.
.. attr:: labels
:type: list
Each entry in a pool's `labels` section indicates that the
corresponding label is available for use in this pool. When creating
nodes for a label, the flavor-related attributes in that label's
section will be used.
.. code-block:: yaml
labels:
- name: bionic
cloud-image: bionic
hardware-profile:
vm-size: Standard_D1_v2
Each entry is a dictionary with the following keys
.. attr:: name
:type: str
:required:
Identifier to refer this label.
.. attr:: cloud-image
:type: str
:required:
Refers to the name of an externally managed image in the
cloud that already exists on the provider. The value of
``cloud-image`` should match the ``name`` of a previously
configured entry from the ``cloud-images`` section of the
provider.
.. attr:: hardware-profile
:required:
.. attr:: vm-size
:required:
:type: str
VM Size of the VMs to use in Azure. See the VM size list on `azure.microsoft.com`_
for the list of sizes availabile in each region.
.. _`Azure CLI`: https://docs.microsoft.com/en-us/cli/azure/create-an-azure-service-principal-azure-cli?view=azure-cli-latest
.. _azure.microsoft.com: https://azure.microsoft.com/en-us/global-infrastructure/services/?products=virtual-machines

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.. _gce-driver:
.. default-domain:: zuul
Google Cloud Compute Engine (GCE) Driver
----------------------------------------
Selecting the gce driver adds the following options to the :attr:`providers`
section of the configuration.
.. attr-overview::
:prefix: providers.[gce]
:maxdepth: 3
.. attr:: providers.[gce]
:type: list
A GCE provider's resources are partitioned into groups called `pool`
(see :attr:`providers.[gce].pools` for details), and within a pool,
the node types which are to be made available are listed
(see :attr:`providers.[gce].pools.labels` for details).
See `Application Default Credentials`_ for information on how to
configure credentials and other settings for GCE access in
Nodepool's runtime environment.
.. note:: For documentation purposes the option names are prefixed
``providers.[gce]`` to disambiguate from other
drivers, but ``[gce]`` is not required in the
configuration (e.g. below
``providers.[gce].pools`` refers to the ``pools``
key in the ``providers`` section when the ``gce``
driver is selected).
Example:
.. code-block:: yaml
- name: gce-uscentral1
driver: gce
project: nodepool-123456
region: us-central1
zone: us-central1-a
cloud-images:
- name: debian-stretch
image-project: debian-cloud
image-family: debian-9
username: zuul
key: ssh-rsa ...
pools:
- name: main
max-servers: 8
labels:
- name: debian-stretch
instance-type: f1-micro
cloud-image: debian-stretch
volume-type: standard
volume-size: 10
.. attr:: name
:required:
A unique name for this provider configuration.
.. attr:: region
:required:
Name of the region to use; see `GCE regions and zones`_.
.. attr:: zone
:required:
Name of the zone to use; see `GCE regions and zones`_.
.. attr:: boot-timeout
:type: int seconds
:default: 60
Once an instance is active, how long to try connecting to the
image via SSH. If the timeout is exceeded, the node launch is
aborted and the instance deleted.
.. attr:: launch-retries
:default: 3
The number of times to retry launching a node before considering
the job failed.
.. attr:: cloud-images
:type: list
Each entry in this section must refer to an entry in the
:attr:`labels` section.
.. code-block:: yaml
cloud-images:
- name: debian-stretch
image-project: debian-cloud
image-family: debian-9
username: zuul
key: ssh-rsa ...
Each entry is a dictionary with the following keys:
.. attr:: name
:type: string
:required:
Identifier to refer this cloud-image from
:attr:`providers.[gce].pools.labels` section.
.. attr:: image-id
:type: str
If this is provided, it is used to select the image from the cloud
provider by ID.
.. attr:: image-project
:type: str
If :attr:`providers.[gce].cloud-images.image-id` is not
provided, this is used along with
:attr:`providers.[gce].cloud-images.image-family` to find an
image.
.. attr:: image-family
:type: str
If :attr:`providers.[gce].cloud-images.image-id` is not
provided, this is used along with
:attr:`providers.[gce].cloud-images.image-project` to find an
image.
.. attr:: username
:type: str
The username that a consumer should use when connecting to the node.
.. attr:: key
:type: str
An SSH public key to add to the instance (project global keys
are added automatically).
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: connection-type
:type: str
The connection type that a consumer should use when connecting to the
node. For most images this is not necessary. However when creating
Windows images this could be 'winrm' to enable access via ansible.
.. attr:: connection-port
:type: int
:default: 22/ 5986
The port that a consumer should use when connecting to the node. For
most diskimages this is not necessary. This defaults to 22 for ssh and
5986 for winrm.
.. attr:: pools
:type: list
A pool defines a group of resources from an GCE provider. Each pool has a
maximum number of nodes which can be launched from it, along with a number
of cloud-related attributes used when launching nodes.
.. attr:: name
:required:
A unique name within the provider for this pool of resources.
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: host-key-checking
:type: bool
:default: True
Specify custom behavior of validation of SSH host keys. When set to
False, nodepool-launcher will not ssh-keyscan nodes after they are
booted. This might be needed if nodepool-launcher and the nodes it
launches are on different networks. The default value is True.
.. attr:: use-internal-ip
:default: False
Whether to access the instance with the internal or external IP
address.
.. attr:: labels
:type: list
Each entry in a pool's `labels` section indicates that the
corresponding label is available for use in this pool. When creating
nodes for a label, the flavor-related attributes in that label's
section will be used.
.. code-block:: yaml
labels:
- name: debian
instance-type: f1-micro
cloud-image: debian-stretch
Each entry is a dictionary with the following keys
.. attr:: name
:type: str
:required:
Identifier to refer this label.
.. attr:: cloud-image
:type: str
:required:
Refers to the name of an externally managed image in the
cloud that already exists on the provider. The value of
``cloud-image`` should match the ``name`` of a previously
configured entry from the ``cloud-images`` section of the
provider. See :attr:`providers.[gce].cloud-images`.
.. attr:: instance-type
:type: str
:required:
Name of the flavor to use. See `GCE machine types`_.
.. attr:: volume-type
:type: string
If given, the root volume type (``pd-standard`` or
``pd-ssd``).
.. attr:: volume-size
:type: int
If given, the size of the root volume, in GiB.
.. _`Application Default Credentials`: https://cloud.google.com/docs/authentication/production
.. _`GCE regions and zones`: https://cloud.google.com/compute/docs/regions-zones/
.. _`GCE machine types`: https://cloud.google.com/compute/docs/machine-types

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.. _kubernetes-driver:
.. default-domain:: zuul
Kubernetes Driver
-----------------
Selecting the kubernetes driver adds the following options to the
:attr:`providers` section of the configuration.
.. attr-overview::
:prefix: providers.[kubernetes]
:maxdepth: 3
.. attr:: providers.[kubernetes]
:type: list
A Kubernetes provider's resources are partitioned into groups
called `pools` (see :attr:`providers.[kubernetes].pools` for
details), and within a pool, the node types which are to be made
available are listed (see :attr:`providers.[kubernetes].pools.labels` for
details).
.. note:: For documentation purposes the option names are prefixed
``providers.[kubernetes]`` to disambiguate from other
drivers, but ``[kubernetes]`` is not required in the
configuration (e.g. below
``providers.[kubernetes].pools`` refers to the ``pools``
key in the ``providers`` section when the ``kubernetes``
driver is selected).
Example:
.. code-block:: yaml
providers:
- name: kubespray
driver: kubernetes
context: admin-cluster.local
pools:
- name: main
labels:
- name: kubernetes-namespace
type: namespace
- name: pod-fedora
type: pod
image: docker.io/fedora:28
.. attr:: context
Name of the context configured in ``kube/config``.
Before using the driver, Nodepool either needs a ``kube/config``
file installed with a cluster admin context, in which case this
setting is required, or if Nodepool is running inside
Kubernetes, this setting and the ``kube/config`` file may be
omitted and Nodepool will use a service account loaded from the
in-cluster configuration path.
.. attr:: launch-retries
:default: 3
The number of times to retry launching a node before considering
the job failed.
.. attr:: pools
:type: list
A pool defines a group of resources from a Kubernetes
provider.
.. attr:: name
:required:
Namespaces are prefixed with the pool's name.
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: labels
:type: list
Each entry in a pool`s `labels` section indicates that the
corresponding label is available for use in this pool.
Each entry is a dictionary with the following keys
.. attr:: name
:required:
Identifier for this label; references an entry in the
:attr:`labels` section.
.. attr:: type
The Kubernetes provider supports two types of labels:
.. value:: namespace
Namespace labels provide an empty namespace configured
with a service account that can create pods, services,
configmaps, etc.
.. value:: pod
Pod labels provide a dedicated namespace with a single pod
created using the
:attr:`providers.[kubernetes].pools.labels.image` parameter and it
is configured with a service account that can exec and get
the logs of the pod.
.. attr:: image
Only used by the
:value:`providers.[kubernetes].pools.labels.type.pod` label type;
specifies the image name used by the pod.
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: cpu
:type: int
Only used by the
:value:`providers.[kubernetes].pools.labels.type.pod` label type;
specifies the number of cpu to request for the pod.
.. attr:: memory
:type: int
Only used by the
:value:`providers.[kubernetes].pools.labels.type.pod` label type;
specifies the amount of memory in MB to request for the pod.
.. attr:: env
:type: list
:default: []
Only used by the
:value:`providers.[kubernetes].pools.labels.type.pod` label type;
A list of environment variables to pass to the Pod.
.. attr:: name
:type: str
:required:
The name of the environment variable passed to the Pod.
.. attr:: value
:type: str
:required:
The value of the environment variable passed to the Pod.
.. attr:: node-selector
:type: dict
Only used by the
:value:`providers.[kubernetes].pools.labels.type.pod` label type;
A map of key-value pairs to ensure the Kubernetes scheduler
places the Pod on a node with specific node labels.

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.. _openshift-pods-driver:
.. default-domain:: zuul
Openshift Pods Driver
---------------------
Selecting the openshift pods driver adds the following options to the
:attr:`providers` section of the configuration.
.. attr:: providers.[openshiftpods]
:type: list
The Openshift Pods driver is similar to the Openshift driver, but it
only support pod label to be created in a single project. This enable
using an unprivileged service account that doesn't requires the
self-provisioner role.
Example:
.. code-block:: yaml
providers:
- name: cluster
driver: openshiftpods
context: unprivileged-context-name
pools:
- name: main
labels:
- name: openshift-pod
image: docker.io/fedora:28
.. attr:: context
:required:
Name of the context configured in ``kube/config``.
Before using the driver, Nodepool services need a ``kube/config`` file
manually installed with self-provisioner (the service account needs to
be able to create projects) context.
Make sure the context is present in ``oc config get-contexts`` command
output.
.. attr:: launch-retries
:default: 3
The number of times to retry launching a pod before considering
the job failed.
.. attr:: max-pods
:default: infinite
:type: int
Maximum number of pods that can be used.
.. attr:: pools
:type: list
A pool defines a group of resources from an Openshift provider.
.. attr:: name
:required:
The project's name that will be used to create the pods.
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: labels
:type: list
Each entry in a pool`s `labels` section indicates that the
corresponding label is available for use in this pool.
Each entry is a dictionary with the following keys
.. attr:: name
:required:
Identifier for this label; references an entry in the
:attr:`labels` section.
.. attr:: image
The image name.
.. attr:: image-pull
:default: IfNotPresent
:type: str
The ImagePullPolicy, can be IfNotPresent, Always or Never.
.. attr:: cpu
:type: int
The number of cpu to request for the pod.
.. attr:: memory
:type: int
The amount of memory in MB to request for the pod.
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: env
:type: list
:default: []
A list of environment variables to pass to the Pod.
.. attr:: name
:type: str
:required:
The name of the environment variable passed to the Pod.
.. attr:: value
:type: str
:required:
The value of the environment variable passed to the Pod.
.. attr:: node-selector
:type: dict
A map of key-value pairs to ensure the OpenShift scheduler
places the Pod on a node with specific node labels.

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.. _openshift-driver:
.. default-domain:: zuul
Openshift Driver
----------------
Selecting the openshift driver adds the following options to the
:attr:`providers` section of the configuration.
.. attr-overview::
:prefix: providers.[openshift]
:maxdepth: 3
.. attr:: providers.[openshift]
:type: list
An Openshift provider's resources are partitioned into groups called `pool`
(see :attr:`providers.[openshift].pools` for details), and within a pool,
the node types which are to be made available are listed
(see :attr:`providers.[openshift].labels` for details).
.. note:: For documentation purposes the option names are prefixed
``providers.[openshift]`` to disambiguate from other
drivers, but ``[openshift]`` is not required in the
configuration (e.g. below
``providers.[openshift].pools`` refers to the ``pools``
key in the ``providers`` section when the ``openshift``
driver is selected).
Example:
.. code-block:: yaml
providers:
- name: cluster
driver: openshift
context: context-name
pools:
- name: main
labels:
- name: openshift-project
type: project
- name: openshift-pod
type: pod
image: docker.io/fedora:28
.. attr:: context
:required:
Name of the context configured in ``kube/config``.
Before using the driver, Nodepool services need a ``kube/config`` file
manually installed with self-provisioner (the service account needs to
be able to create projects) context.
Make sure the context is present in ``oc config get-contexts`` command
output.
.. attr:: launch-retries
:default: 3
The number of times to retry launching a node before considering
the job failed.
.. attr:: max-projects
:default: infinite
:type: int
Maximum number of projects that can be used.
.. attr:: pools
:type: list
A pool defines a group of resources from an Openshift provider.
.. attr:: name
:required:
Project's name are prefixed with the pool's name.
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: labels
:type: list
Each entry in a pool`s `labels` section indicates that the
corresponding label is available for use in this pool.
Each entry is a dictionary with the following keys
.. attr:: name
:required:
Identifier for this label; references an entry in the
:attr:`labels` section.
.. attr:: type
The Openshift provider supports two types of labels:
.. value:: project
Project labels provide an empty project configured
with a service account that can create pods, services,
configmaps, etc.
.. value:: pod
Pod labels provide a new dedicated project with a single
pod created using the
:attr:`providers.[openshift].labels.image` parameter and it
is configured with a service account that can exec and get
the logs of the pod.
.. attr:: image
Only used by the
:value:`providers.[openshift].labels.type.pod` label type;
specifies the image name used by the pod.
.. attr:: image-pull
:default: IfNotPresent
:type: str
The ImagePullPolicy, can be IfNotPresent, Always or Never.
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: cpu
:type: int
Only used by the
:value:`providers.[openshift].labels.type.pod` label type;
specifies the number of cpu to request for the pod.
.. attr:: memory
:type: int
Only used by the
:value:`providers.[openshift].labels.type.pod` label type;
specifies the amount of memory in MB to request for the pod.
.. attr:: env
:type: list
:default: []
Only used by the
:value:`providers.[openshift].labels.type.pod` label type;
A list of environment variables to pass to the Pod.
.. attr:: name
:type: str
:required:
The name of the environment variable passed to the Pod.
.. attr:: value
:type: str
:required:
The value of the environment variable passed to the Pod.
.. attr:: node-selector
:type: dict
Only used by the
:value:`providers.[openshift].labels.type.pod` label type;
A map of key-value pairs to ensure the OpenShift scheduler
places the Pod on a node with specific node labels.

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.. _openstack-driver:
.. default-domain:: zuul
OpenStack Driver
----------------
Selecting the OpenStack driver adds the following options to the
:attr:`providers` section of the configuration.
.. attr-overview::
:prefix: providers.[openstack]
:maxdepth: 3
.. attr:: providers.[openstack]
Specifying the ``openstack`` driver for a provider adds the
following keys to the :attr:`providers` configuration.
.. note:: For documentation purposes the option names are prefixed
``providers.[openstack]`` to disambiguate from other
drivers, but ``[openstack]`` is not required in the
configuration (e.g. below ``providers.[openstack].cloud``
refers to the ``cloud`` key in the ``providers`` section
when the ``openstack`` driver is selected).
An OpenStack provider's resources are partitioned into groups
called "pools" (see :attr:`providers.[openstack].pools` for details),
and within a pool, the node types which are to be made available
are listed (see :attr:`providers.[openstack].pools.labels` for
details).
Within each OpenStack provider the available Nodepool image types
are defined (see :attr:`providers.[openstack].diskimages`).
.. code-block:: yaml
providers:
- name: provider1
driver: openstack
cloud: example
region-name: 'region1'
rate: 1.0
boot-timeout: 120
launch-timeout: 900
launch-retries: 3
image-name-format: '{image_name}-{timestamp}'
hostname-format: '{label.name}-{provider.name}-{node.id}'
post-upload-hook: /usr/bin/custom-hook
diskimages:
- name: trusty
meta:
key: value
key2: value
- name: precise
- name: devstack-trusty
pools:
- name: main
max-servers: 96
availability-zones:
- az1
networks:
- some-network-name
security-groups:
- zuul-security-group
labels:
- name: trusty
min-ram: 8192
diskimage: trusty
console-log: True
- name: precise
min-ram: 8192
diskimage: precise
- name: devstack-trusty
min-ram: 8192
diskimage: devstack-trusty
- name: provider2
driver: openstack
cloud: example2
region-name: 'region1'
rate: 1.0
image-name-format: '{image_name}-{timestamp}'
hostname-format: '{label.name}-{provider.name}-{node.id}'
diskimages:
- name: precise
meta:
key: value
key2: value
pools:
- name: main
max-servers: 96
labels:
- name: trusty
min-ram: 8192
diskimage: trusty
- name: precise
min-ram: 8192
diskimage: precise
- name: devstack-trusty
min-ram: 8192
diskimage: devstack-trusty
.. attr:: cloud
:type: string
:required:
Name of a cloud configured in ``clouds.yaml``.
The instances spawned by nodepool will inherit the default
security group of the project specified in the cloud definition
in `clouds.yaml` (if other values not specified). This means
that when working with Zuul, for example, SSH traffic (TCP/22)
must be allowed in the project's default security group for Zuul
to be able to reach instances.
More information about the contents of `clouds.yaml` can be
found in `the openstacksdk documentation
<https://docs.openstack.org/openstacksdk/>`_.
.. attr:: boot-timeout
:type: int seconds
:default: 60
Once an instance is active, how long to try connecting to the
image via SSH. If the timeout is exceeded, the node launch is
aborted and the instance deleted.
.. attr:: launch-timeout
:type: int seconds
:default: 3600
The time to wait from issuing the command to create a new instance
until that instance is reported as "active". If the timeout is
exceeded, the node launch is aborted and the instance deleted.
.. attr:: nodepool-id
:type: string
:default: None
*Deprecated*
A unique string to identify which nodepool instances is using a
provider. This is useful if you want to configure production
and development instances of nodepool but share the same
provider.
.. attr:: launch-retries
:type: int
:default: 3
The number of times to retry launching a server before
considering the job failed.
.. attr:: region-name
:type: string
The region name if the provider cloud has multiple regions.
.. attr:: hostname-format
:type: string
:default: {label.name}-{provider.name}-{node.id}
Hostname template to use for the spawned instance.
.. attr:: image-name-format
:type: string
:default: {image_name}-{timestamp}
Format for image names that are uploaded to providers.
.. attr:: post-upload-hook
:type: string
:default: None
Filename of an optional script that can be called after an image has
been uploaded to a provider but before it is taken into use. This is
useful to perform last minute validation tests before an image is
really used for build nodes. The script will be called as follows:
``<SCRIPT> <PROVIDER> <EXTERNAL_IMAGE_ID> <LOCAL_IMAGE_FILENAME>``
If the script returns with result code 0 it is treated as successful
otherwise it is treated as failed and the image gets deleted.
.. attr:: rate
:type: int seconds
:default: 1
In seconds, amount to wait between operations on the provider.
.. attr:: clean-floating-ips
:type: bool
:default: True
If it is set to True, nodepool will assume it is the only user of
the OpenStack project and will attempt to clean unattached
floating ips that may have leaked around restarts.
.. attr:: port-cleanup-interval
:type: int seconds
:default: 600
If greater than 0, nodepool will assume it is the only user of the
OpenStack project and will attempt to clean ports in `DOWN` state after
the cleanup interval has elapsed. This value can be reduced if the
instance spawn time on the provider is reliably quicker.
.. attr:: diskimages
:type: list
Each entry in a provider's `diskimages` section must correspond
to an entry in :attr:`diskimages`. Such an entry indicates that
the corresponding diskimage should be uploaded for use in this
provider. Additionally, any nodes that are created using the
uploaded image will have the associated attributes (such as
flavor or metadata).
If an image is removed from this section, any previously uploaded
images will be deleted from the provider.
.. code-block:: yaml
diskimages:
- name: precise
pause: False
meta:
key: value
key2: value
- name: windows
connection-type: winrm
connection-port: 5986
Each entry is a dictionary with the following keys
.. attr:: name
:type: string
:required:
Identifier to refer this image from
:attr:`providers.[openstack].pools.labels` and
:attr:`diskimages` sections.
.. attr:: pause
:type: bool
:default: False
When set to True, nodepool-builder will not upload the image
to the provider.
.. attr:: config-drive
:type: bool
:default: unset
Whether config drive should be used for the image. Defaults to
unset which will use the cloud's default behavior.
.. attr:: meta
:type: dict
Arbitrary key/value metadata to store for this server using
the Nova metadata service. A maximum of five entries is
allowed, and both keys and values must be 255 characters or
less.
.. attr:: connection-type
:type: string
The connection type that a consumer should use when connecting
to the node. For most diskimages this is not
necessary. However when creating Windows images this could be
``winrm`` to enable access via ansible.
.. attr:: connection-port
:type: int
:default: 22 / 5986
The port that a consumer should use when connecting to the
node. For most diskimages this is not necessary. This defaults
to 22 for ssh and 5986 for winrm.
.. attr:: cloud-images
:type: list
Each entry in this section must refer to an entry in the
:attr:`labels` section.
.. code-block:: yaml
cloud-images:
- name: trusty-external
config-drive: False
- name: windows-external
connection-type: winrm
connection-port: 5986
Each entry is a dictionary with the following keys
.. attr:: name
:type: string
:required:
Identifier to refer this cloud-image from :attr:`labels`
section. Since this name appears elsewhere in the nodepool
configuration file, you may want to use your own descriptive
name here and use one of ``image-id`` or ``image-name`` to
specify the cloud image so that if the image name or id
changes on the cloud, the impact to your Nodepool
configuration will be minimal. However, if neither of those
attributes are provided, this is also assumed to be the image
name or ID in the cloud.
.. attr:: config-drive
:type: bool
:default: unset
Whether config drive should be used for the cloud
image. Defaults to unset which will use the cloud's default
behavior.
.. attr:: image-id
:type: str
If this is provided, it is used to select the image from the
cloud provider by ID, rather than name. Mutually exclusive
with :attr:`providers.[openstack].cloud-images.image-name`
.. attr:: image-name
:type: str
If this is provided, it is used to select the image from the
cloud provider by this name or ID. Mutually exclusive with
:attr:`providers.[openstack].cloud-images.image-id`
.. attr:: username
:type: str
The username that a consumer should use when connecting to the
node.
.. attr:: python-path
:type: str
:default: auto
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: connection-type
:type: str
The connection type that a consumer should use when connecting
to the node. For most diskimages this is not
necessary. However when creating Windows images this could be
'winrm' to enable access via ansible.
.. attr:: connection-port
:type: int
:default: 22/ 5986
The port that a consumer should use when connecting to the
node. For most diskimages this is not necessary. This defaults
to 22 for ssh and 5986 for winrm.
.. attr:: pools
:type: list
A pool defines a group of resources from an OpenStack
provider. Each pool has a maximum number of nodes which can be
launched from it, along with a number of cloud-related attributes
used when launching nodes.
.. code-block:: yaml
pools:
- name: main
max-servers: 96
availability-zones:
- az1
networks:
- some-network-name
security-groups:
- zuul-security-group
auto-floating-ip: False
host-key-checking: True
node-attributes:
key1: value1
key2: value2
labels:
- name: trusty
min-ram: 8192
diskimage: trusty
console-log: True
- name: precise
min-ram: 8192
diskimage: precise
- name: devstack-trusty
min-ram: 8192
diskimage: devstack-trusty
Each entry is a dictionary with the following keys
.. attr:: name
:type: string
:required:
Pool name
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: max-cores
:type: int
Maximum number of cores usable from this pool. This can be used
to limit usage of the tenant. If not defined nodepool can use
all cores up to the quota of the tenant.
.. attr:: max-servers
:type: int
Maximum number of servers spawnable from this pool. This can
be used to limit the number of servers. If not defined
nodepool can create as many servers the tenant allows.
.. attr:: max-ram
:type: int
Maximum ram usable from this pool. This can be used to limit
the amount of ram allocated by nodepool. If not defined
nodepool can use as much ram as the tenant allows.
.. attr:: ignore-provider-quota
:type: bool
:default: False
Ignore the provider quota for this pool. Instead, only check
against the configured max values for this pool and the
current usage based on stored data. This may be useful in
circumstances where the provider is incorrectly calculating
quota.
.. attr:: availability-zones
:type: list
A list of availability zones to use.
If this setting is omitted, nodepool will fetch the list of
all availability zones from nova. To restrict nodepool to a
subset of availability zones, supply a list of availability
zone names in this setting.
Nodepool chooses an availability zone from the list at random
when creating nodes but ensures that all nodes for a given
request are placed in the same availability zone.
.. attr:: networks
:type: list
Specify custom Neutron networks that get attached to each
node. Specify the name or id of the network as a string.
.. attr:: security-groups
:type: list
Specify custom Neutron security groups that get attached to
each node. Specify the name or id of the security_group as a
string.
.. attr:: auto-floating-ip
:type: bool
:default: True
Specify custom behavior of allocating floating ip for each
node. When set to False, ``nodepool-launcher`` will not apply
floating ip for nodes. When zuul instances and nodes are
deployed in the same internal private network, set the option
to False to save floating ip for cloud provider.
.. attr:: host-key-checking
:type: bool
:default: True
Specify custom behavior of validation of SSH host keys. When
set to False, nodepool-launcher will not ssh-keyscan nodes
after they are booted. This might be needed if
nodepool-launcher and the nodes it launches are on different
networks. The default value is True.
.. attr:: labels
:type: list
Each entry in a pool`s `labels` section indicates that the
corresponding label is available for use in this pool. When
creating nodes for a label, the flavor-related attributes in that
label's section will be used.
.. code-block:: yaml
labels:
- name: precise
min-ram: 8192
flavor-name: 'something to match'
console-log: True
- name: trusty
min-ram: 8192
networks:
- public
- private
Each entry is a dictionary with the following keys
.. attr:: name
:type: str
:required:
Identifier to refer this image; from :attr:`labels` and
:attr:`diskimages` sections.
.. attr:: diskimage
:type: str
:required:
Refers to provider's diskimages, see
:attr:`providers.[openstack].diskimages`. Mutually exclusive
with :attr:`providers.[openstack].pools.labels.cloud-image`
.. attr:: cloud-image
:type: str
:required:
Refers to the name of an externally managed image in the
cloud that already exists on the provider. The value of
``cloud-image`` should match the ``name`` of a previously
configured entry from the ``cloud-images`` section of the
provider. See :attr:`providers.[openstack].cloud-images`.
Mutually exclusive with
:attr:`providers.[openstack].pools.labels.diskimage`
.. attr:: flavor-name
:type: str
Name or id of the flavor to use. If
:attr:`providers.[openstack].pools.labels.min-ram` is
omitted, it must be an exact match. If
:attr:`providers.[openstack].pools.labels.min-ram` is given,
``flavor-name`` will be used to find flavor names that meet
:attr:`providers.[openstack].pools.labels.min-ram` and also
contain ``flavor-name``.
One of :attr:`providers.[openstack].pools.labels.min-ram` or
:attr:`providers.[openstack].pools.labels.flavor-name` must
be specified.
.. attr:: min-ram
:type: int
Determine the flavor to use (e.g. ``m1.medium``,
``m1.large``, etc). The smallest flavor that meets the
``min-ram`` requirements will be chosen.
One of :attr:`providers.[openstack].pools.labels.min-ram` or
:attr:`providers.[openstack].pools.labels.flavor-name` must
be specified.
.. attr:: boot-from-volume
:type: bool
:default: False
If given, the label for use in this pool will create a
volume from the image and boot the node from it.
.. attr:: host-key-checking
:type: bool
:default: True
Specify custom behavior of validation of SSH host keys. When set to
False, nodepool-launcher will not ssh-keyscan nodes after they are
booted. This might be needed if nodepool-launcher and the nodes it
launches are on different networks. The default value is True.
.. note:: This value will override the value for
:attr:`providers.[openstack].pools.host-key-checking`.
.. attr:: networks
:type: list
Specify custom Neutron networks that get attached to each
node. Specify the name or id of the network as a string.
.. note:: This value will override the value for
:attr:`providers.[openstack].pools.networks`.
.. attr:: key-name
:type: string
If given, is the name of a keypair that will be used when
booting each server.
.. attr:: console-log
:type: bool
:default: False
On the failure of the ssh ready check, download the server
console log to aid in debugging the problem.
.. attr:: volume-size
:type: int gigabytes
:default: 50
When booting an image from volume, how big should the
created volume be.
.. attr:: instance-properties
:type: dict
:default: None
A dictionary of key/value properties to set when booting
each server. These properties become available via the
``meta-data`` on the active server (e.g. within
``config-drive:openstack/latest/meta_data.json``)
.. attr:: userdata
:type: str
:default: None
A string of userdata for a node. Example usage is to install
cloud-init package on image which will apply the userdata.
Additional info about options in cloud-config:
https://cloudinit.readthedocs.io/en/latest/topics/examples.html

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.. _static-driver:
.. default-domain:: zuul
Static Driver
-------------
Selecting the static driver adds the following options to the
:attr:`providers` section of the configuration.
.. attr-overview::
:prefix: providers.[static]
:maxdepth: 3
.. attr:: providers.[static]
:type: list
The static provider driver is used to define static nodes.
.. note:: For documentation purposes the option names are prefixed
``providers.[static]`` to disambiguate from other
drivers, but ``[static]`` is not required in the
configuration (e.g. below ``providers.[static].pools``
refers to the ``pools`` key in the ``providers`` section
when the ``static`` driver is selected).
Example:
.. code-block:: yaml
providers:
- name: static-rack
driver: static
pools:
- name: main
nodes:
- name: trusty.example.com
labels: trusty-static
timeout: 13
connection-port: 22022
host-key: fake-key
username: zuul
max-parallel-jobs: 1
.. attr:: pools
:type: list
A pool defines a group of statically declared nodes.
.. note::
When providing different labels, it is better to have one pool per
label to avoid requests being queued when one label is at capacity.
Each entry is a dictionary with entries as follows
.. attr:: name
:type: str
:required:
Pool name
.. attr:: node-attributes
:type: dict
A dictionary of key-value pairs that will be stored with the node data
in ZooKeeper. The keys and values can be any arbitrary string.
.. attr:: nodes
:type: list
:required:
Each entry indicates a static node and it's attributes.
.. attr:: name
:type: str
:required:
The hostname or ip address of the static node. This must be
unique across all nodes defined within the configuration file.
.. attr:: labels
:type: list
:required:
The list of labels associated with the node.
.. attr:: host-key-checking
:type: bool
:default: True
Specify custom behavior of validation of host connection.
When set to False, nodepool-launcher will not scan the nodes
before they are registered. This might be needed if
nodepool-launcher and the static nodes are on isolated
networks. The default value is True.
.. attr:: timeout
:type: int
:default: 5
The timeout in second before the ssh ping is considered failed.
.. attr:: connection-type
:type: string
:default: ssh
The connection type that a consumer should use when connecting
to the node.
.. value:: winrm
.. value:: ssh
.. attr:: connection-port
:type: int
:default: 22 / 5986
The port that a consumer should use when connecting to the node.
For most nodes this is not necessary. This defaults to 22 when
``connection-type`` is 'ssh' and 5986 when it is 'winrm'.
.. attr:: host-key
:type: str
The ssh host key of the node.
.. attr:: username
:type: str
:default: zuul
The username nodepool will use to validate it can connect to the
node.
.. attr:: python-path
:type: str
:default: /usr/bin/python2
The path of the default python interpreter. Used by Zuul to set
``ansible_python_interpreter``. The special value ``auto`` will
direct Zuul to use inbuilt Ansible logic to select the
interpreter on Ansible >=2.8, and default to
``/usr/bin/python2`` for earlier versions.
.. attr:: max-parallel-jobs
:type: int
:default: 1
The number of jobs that can run in parallel on this node.