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Setting up a development environment with devstack

This page describes how to setup a working development environment that can be used in deploying manila on latest releases of Ubuntu, Fedora or CentOS. These instructions assume you are already familiar with git.

We recommend using devstack to develop and test code changes to manila or to simply evaluate the manila project. Devstack is a shell script to build complete OpenStack development environments on a virtual machine. If you are not familar with devstack, these pages can give you context:

Be aware that manila is not enabled in devstack by default; you will need to add a few lines to the devstack local.conf file to let devstack deploy and configure manila on your virtual machine.

Getting devstack

Start by cloning the devstack repository:

git clone https://git.openstack.org/openstack-dev/devstack

Change to devstack directory:

cd devstack/

You're now on master branch of devstack, switch to the branch you want to test or develop against.

Sample local.conf files that get you started

Now that you have cloned the devstack repository, you need to configure devstack before deploying it. This is done with a local.conf file. For manila, the local.conf file can also determine which back end(s) are set up.

Caution

When using devstack with the below configurations, be aware that you will be setting up fake storage. The LVM, Generic, ZFSOnLinux drivers have not been developed for production use. They exist to provide a vanilla development and testing environment for manila contributors.

DHSS=False (driver_handles_share_servers=False) mode:

This is the easier mode for new contributors. Manila share back-end drivers that operate in driver_handles_share_servers=False mode do not allow creating shares on private project networks. On the resulting stack, all manila shares created by you are exported on the host network and hence are accessible to any compute resource (e.g.: virtual machine, baremetal, container) that is able to reach the devstack host.

LVM driver <samples/lvm_local.conf>
ZFSOnLinux driver <samples/zfsonlinux_local.conf>
CEPHFS driver <samples/cephfs_local.conf>

DHSS=True (driver_handles_share_servers=True) mode:

You may use the following setups if you are familiar with manila, and would like to test with the project (tenant) isolation that manila provides on the network and data path. Manila share back-end drivers that operate in driver_handles_share_servers=True mode create shares on isolated project networks if told to do so. On the resulting stack, when creating a share, you must specify a share network to export the share to, and the share will be accessible to any compute resource (e.g.: Virtual machine, baremetal, containers) that is able to reach the share network you indicated.

Typically, new contributors take a while to understand OpenStack networking, and we recommend that you familiarize yourself with the DHSS=False mode setup before attempting DHSS=True.

Generic driver <samples/generic_local.conf>
Container driver <samples/container_local.conf>

Building your devstack

Copy the appropriate sample local.conf file into the devstack folder on your virtual machine, make sure to name it local.conf
Make sure to read inline comments and customize values where necessary
If you would like to run minimal services in your stack, or allow devstack to bootstrap tempest testing framework for you, see more-customization
Finally, run the stack.sh script from within the devstack directory. We recommend that your run this inside a screen or tmux session because it could take a while:
```
./stack.sh
```
After the script completes, you should have manila services running. You can verify that the services are running with the following commands:
```
$ systemctl status devstack@m-sch
$ systemctl status devstack@m-shr
$ systemctl status devstack@m-dat
```
By default, devstack sets up manila-api behind apache. The service name is httpd on Red Hat based systems and apache2 on Debian based systems.
You may also use your "demo" credentials to invoke the command line clients:
```
$ source DEVSTACK_DIR/openrc admin demo
$ manila service-list
```

The logs are accessible through journalctl. The following commands let you query logs. You may use the -f option to tail these logs:

$ journalctl -a -o short-precise --unit devstack@m-sch
$ journalctl -a -o short-precise --unit devstack@m-shr
$ journalctl -a -o short-precise --unit devstack@m-dat

If running behind apache, the manila-api logs will be in /var/log/httpd/manila_api.log (Red Hat) or in /var/log/apache2/manila_api.log (Debian).

More devstack customizations

Testing branches and changes submitted for review

To test a patch in review:

enable_plugin manila git://git.openstack.org/openstack/manila <ref>

If the ref is from review.openstack.org, it is structured as:

refs/changes/<last two digits of review number>/<review number>/<patchset number>

For example, if you want to test patchset 4 of https://review.openstack.org/#/c/614170/, you can provide this in your local.conf:

enable_plugin manila git://git.openstack.org/openstack/manila refs/changes/70/614170/4

ref can also simply be a stable branch name, for example:

enable_plugin manila git://git.openstack.org/openstack/manila stable/rocky

Limiting the services enabled in your stack

Manila needs only a message queue (rabbitmq) and a database (mysql, postgresql) to operate. Additionally, keystone service provides project administration if necessary, all other OpenStack services are not necessary to set up a basic test system.¹ ²

You can add the following to your local.conf to deploy your stack in a minimal fashion. This saves you a lot of time and resources, but could limit your testing:

ENABLED_SERVICES=key,mysql,rabbit,tempest,manila,m-api,m-sch,m-shr,m-dat

Optionally, you can deploy with Manila, Nova, Neutron, Glance and Tempest:

ENABLED_SERVICES=key,mysql,rabbit,tempest,g-api,g-reg
ENABLED_SERVICES+=n-api,n-cpu,n-cond,n-sch,n-crt,n-cauth,n-obj,placement-api,placement-client
ENABLED_SERVICES+=q-svc,q-dhcp,q-meta,q-l3,q-agt
ENABLED_SERVICES+=tempest

Bootstrapping Tempest

Add the following options in your local.conf to set up tempest:

ENABLE_ISOLATED_METADATA=True
TEMPEST_USE_TEST_ACCOUNTS=True
TEMPEST_ALLOW_TENANT_ISOLATION=False
TEMPEST_CONCURRENCY=8

The Generic driver cannot be run without deploying Cinder, Nova, Glance and Neutron.↩︎
You must enable Horizon to use manila-ui. Horizon will not work well when Nova, Cinder, Glance and Neutron are not enabled.↩︎

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