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8 years ago

Add a Kolla 'devstack' mode · 5cb37564

Paul Bourke authored 8 years ago

Add a new variable 'kolla_devmode', which when enabled, clones and
bindmounts service source code into the containers.

This commit adds the relevant changes for Heat, more services can be
added and built upon.

Usage:
* Set 'kolla_devmode: yes'

* Code is cloned to /opt/stack/{{ project_name }} on target
  node(s)

* Users can develop in these repos, and simply restart the container to
  pick up / test changes.

Debugging can be done from the host via 'remote_pdb'[0].

[0] https://pypi.python.org/pypi/remote-pdb

Implements: blueprint mount-sources
Change-Id: Ic0431b10d723bf84eeefc72039376fe0058dd902

5cb37564

Add a Kolla 'devstack' mode

Paul Bourke authored 8 years ago

Add a new variable 'kolla_devmode', which when enabled, clones and
bindmounts service source code into the containers.

This commit adds the relevant changes for Heat, more services can be
added and built upon.

Usage:
* Set 'kolla_devmode: yes'

* Code is cloned to /opt/stack/{{ project_name }} on target
  node(s)

* Users can develop in these repos, and simply restart the container to
  pick up / test changes.

Debugging can be done from the host via 'remote_pdb'[0].

[0] https://pypi.python.org/pypi/remote-pdb

Implements: blueprint mount-sources
Change-Id: Ic0431b10d723bf84eeefc72039376fe0058dd902

kolla-for-openstack-development.rst 1.67 KiB

Using Kolla For OpenStack Development

Kolla-ansible can be used to deploy containers in a way suitable for doing development on OpenStack services.

Note

This functionality is new in the Pike release.

Heat was the first service to be supported, and so the following will use submitting a patch to Heat using Kolla as an example.

Only source containers are supported.

Warning

Kolla dev mode is intended for OpenStack hacking/development only. Do not use this in production!

Enabling Kolla "dev mode"

To enable dev mode for all supported services, set in /etc/kolla/globals.yml:

kolla_dev_mode: true

To enable it just for heat, set:

heat_dev_mode: true

Usage

When enabled, the source repo for the service in question will be cloned under /opt/stack/ on the target node(s). This will be bind mounted into the container's virtualenv under the location expected by the service on startup.

After making code changes, simply restart the container to pick them up:

docker restart heat_api

Debugging

remote_pdb can be used to perform debugging with Kolla containers. First, make sure it is installed in the container in question:

docker exec -it -u root heat_api pip install remote_pdb

Then, set your breakpoint as follows:

from remote_pdb import RemotePdb
RemotePdb('127.0.0.1', 4444).set_trace()

Once you run the code(restart the container), pdb can be accessed using socat:

socat readline tcp:127.0.0.1:4444

For more information on remote_pdb, see https://pypi.python.org/pypi/remote-pdb.