6.2 KiB
Kolla Kubernetes Host Setup Guide
Dependencies
Component | Min Version | Max Version | Comment |
---|---|---|---|
Ansible | 2.00 | none | On deployment host |
Docker | 1.10 | none | On target nodes |
Docker Python | 1.6.0 | none | On target nodes |
Python Jinja2 | 2.8.0 | none | On deployment host |
Kubernetes | 1.3.0 | none | On all hosts |
Note
Kolla (which provides the templating) is sensitive about the Ansible version. Mainline currently requires 2.0.x or above.
Installing Docker
Since Docker is required to build images as well as be present on all deployed targets, the Kolla community recommends installing the official Docker, Inc. packaged version of Docker for maximum stability and compatibility with the following command:
Note
Docker 1.11.0 is not compatible with Kubernetes due to some issues in
Docker. The below command will install the latest docker and revert back
to 1.10.3. For different Debian or Ubuntu distributions, you may need to
use apt-cache madison docker-engine
to get the correct
version.
# Install Docker
curl -sSL https://get.docker.io | bash
Setup Docker
Docker needs to run with the root filesystem as shared in order for Neutron to function in 'thin' containers. The reason for that is mount propogation. Mounts need to be shared so the network namespaces are shared amoung the host and the Neutron containers.
For CentOS and other systemd distros, change MountFlags from "slave" to "shared" and restart Docker.
# CentOS (and other systemd distros)
cat > /etc/systemd/system/docker.service <<EOF
.include /usr/lib/systemd/system/docker.service
[Service]
MountFlags=shared
EOF
# Restart the Docker daemon
systemctl daemon-reload
systemctl start docker
For Ubuntu 14.04 LTS, add a command to /etc/rc.local to mark the root filesystem as shared upon startup.
# Ubuntu (and other non-systemd distros)
# Edit /etc/rc.local to add:
mount --make-shared /
# Ensure the mount is shared
sudo sh /etc/rc.local
Kubernetes Setup
A user can show up with an already running Kubernetes or follow the
minikube
for help on
getting Kubernetes setup. The minikube doc is the most well tested
method.
In addition there's the kubernetes-all-in-one
doc.
Installing Kolla and Kolla-Kubernetes
Follow the instructions for a full install if you
are not a developer. Choose a development install if
you will frequently pull or contribute patches. A development install
allows you to `git pull
within the
repository in order to use the latest code without having to re-install.
It also removes the need to copy files to system directories such as
/etc/kolla, and allows you to use git diff
` to see
all code or resource file changes that you or the system has made.
Generate Config File
This operation is soon to be split out from the Kolla repo.
Kolla-kubernetes depends on configuration files (and images) that are
generated from kolla. When fully installed, kolla default configuration
files (globals.yml) are expected in /etc/kolla
(globals.yml). Newly generated configuration files are placed in the
same directory. Kolla's generate_passwords.py
creates a
passwords.yml file which contains passwords and encryption keys.
Kolla's kolla-ansible genconfig
will generate the config
files for each kolla service container based on the contents of
globals.yml and passwords.yml
First, edit /etc/kolla/globals.yml
and add the
following:
# Kolla-kubernetes custom configuration
orchestration_engine: "KUBERNETES"
api_interface_address: "0.0.0.0"
memcached_servers: "memcached"
keystone_database_address: "mariadb"
keystone_admin_url: "http://keystone-admin:35357/v3"
keystone_internal_url: "http://keystone-public:5000/v3"
keystone_public_url: "http://keystone-public:5000/v3"
glance_registry_host: "glance"
Then, generate the config files for all the services:
cd kolla
./tools/kolla-ansible genconfig
Full Install
# Clone Kolla
git clone https://git.openstack.org/openstack/kolla
# Install Kolla
pushd kolla
sudo pip install .
sudo cp -r ./etc/kolla /etc
popd
# Clone Kolla-Kubernetes
git clone https://git.openstack.org/openstack/kolla-kubernetes
# Install Kolla-Kubernetes
pushd kolla-kubernetes
sudo pip install .
sudo cp -r ./etc/kolla-kubernetes /etc
popd
Development Install
# Clone Kolla
git clone https://git.openstack.org/openstack/kolla
# Install Kolla
pushd kolla
sudo pip install --editable .
sudo ln -sf `readlink -f ./etc/kolla` /etc/ # link from hard-coded kolla path
popd
# Clone Kolla-Kubernetes
git clone https://git.openstack.org/openstack/kolla-kubernetes
# Install Kolla-Kubernetes
pushd kolla-kubernetes
sudo pip install --editable .
popd
Note
- Ansible commands (e.g. kolla-ansible) targeting the local machine
require sudo because ansible creates /etc/.ansible_*
and
/etc/kolla/<service>
files which require root
permissions. - Executing local versions of kolla tools
./tools/kolla-ansible
instead of from the system path, will
locate resource files from relative locations instead of system
locations. - The development install will also work with Python virtual
environments.
Building Kolla Containers
Kolla-kubernetes uses Kolla's containers.
The Kolla documentation engine has a detailed overview of building the containers.
Build Kolla's containers locally:
kolla-build mariadb glance neutron nova openvswitch memcached \
kolla-toolbox keystone horizon