A blue-green deployment plugin for tsuru client
Python 2.7
tsuru plugin-install bluegreen https://raw.githubusercontent.com/emerleite/tsuru-bluegreen/master/src/bluegreen.py
Tsuru bluegreen uses convention over configuration. It assumes your application backend is named using blue and green sufixes, as explained bellow:
Create a tsuru-bluegreen.ini in your application root with the following configuration:
[Application]
name: <your_app>
[NewRelic]
api_key: <newrelic_api_key>
app_id: <newrelic_app_id>
[WebHook]
endpoint: http://example.com
payload_extras: key1=value1&key2=value2
[Hooks]
before_pre: <command to run before 'pre' action>
after_pre: <command to run after a successful 'pre' action>
before_swap: <command to run before 'swap' action>
after_swap: <command to run after a successful 'swap' action>
Based on the name configuration value, you must have to have two tsuru applications and git remotes named: your_app**-blue** and your_app**-green**.
Notify New Relic about your deployment after swap. See NewRelic docs.
POST to a WebHook after deployment swap. The payload is the defined payload_extras plus tag=<tag_value>.
Hooks are optional. They are ran before or after the corresponding actions, and everything sent to stdout and stderr is ignored. If a before hook fails (return value isn't zero), the action (pre/swap) is cancelled. If you want to run the pre/swap action independently of the before hook execution, you need to make sure it always returns 0.
Hooks must run inside a shell. If you want to run a curl command, for instance, you should do it inside a shell script:
$ cat script.sh
#! /bin/sh
curl http://example.com
$ cat tsuru-bluegreen.ini
[Application]
name: test
[Hooks]
before_pre: ./script.sh
$ tsuru bluegreen pre -t some-tag
In this case, if curl command fails, the pre action will be cancelled.
$ tsuru app-list
+---------------+-------------------------+---------------------------------------------------+--------+
| Application | Units State Summary | Address | Ready? |
+---------------+-------------------------+---------------------------------------------------+--------+
| sample-blue | 4 of 4 units in-service | sample.example.com, sample-blue.cloud.example.com | Yes |
| sample-green | 0 of 0 units in-service | sample-green.cloud.globoi.com | Yes |
+---------------+-------------------------+---------------------------------------------------+--------+
$ git remote
sample-blue
sample-green
tsuru bluegreen --help
usage: tsuru bluegreen action [options]
Tsuru blue-green deployment (pre and live).
positional arguments:
action pre or swap
optional arguments:
-h, --help show this help message and exit
-t [TAG], --tag [TAG] Tag to be deployed (default: master)
$ pip install -r test_requirements.txt
$ nosetests test/*.py
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