User:Thcipriani/Deployment pipeline/Tutorial
There are many moving pieces in the deployment pipeline. To better understand how those pieces fit together, let's work through a concrete example.
This example uses the HelloWorldOid repository. HelloWorldOid uses FIGlet and cowsay to say "Hello World!" to folks over HTTP.
Goal
Deploy a simple update for HelloWorldOid.
Steps
Update helloworldoid
The process of deployment starts with an idea for a change. I feel like HelloWorldOid could use some pop. Some pizzazz. That'll get the VC money to start rolling in, for sure! To that end, I propose we add a date to the output of HelloWorldOid — this way we'll know:
- The world is a welcoming place
- The world is a welcoming place full of cows
- The time at which the world was so welcoming and cow filled
I made the following patchset and submitted a change to gerrit:
From: Tyler Cipriani <tcipriani@wikimedia.org>
Date: Thu, 25 Jul 2019 10:20:03 -0600
Subject: [PATCH] Add Timestamp to output
To help better preserve the memory of the beautiful moment when the world was greeted and all was well.
---
lib/server.js | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/server.js b/lib/server.js
index 99fecd9..5549430 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -38,12 +38,14 @@ function serve(message, port = 8001) {
+ var timestamp_text = '\n\nTimestamp: ' + new Date().toISOString();
+
res.end(cowsay.say({
text : text,
r : true,
- }));
+ }) + timestamp_text);
--
2.20.1
After pushing this diff up to Gerrit (because blubber-doc/example/helloworldoid is setup in the integration/config repo to use the service-pipeline) CI builds and runs the image described by the test Blubber variant, and reports the result in Gerrit:
Since all tests pass, I'll vote CR+2 on the patchset and the deployment pipeline will:
- Build my
productionvariant - Deploy my production image to an integration environment
- Run any integration tests defined by
helm test - If my integration tests pass:
- My production image is pushed to
docker-registry.wikimedia.org - The pipeline comments on my patch with a pointer to the new image and tags it made:
- My production image is pushed to
Update the deployment chart
Using the information from PipelineBot, I can update the HelloWorldOid to bump the image version in all environments to the new image.
From 0c5eda0f9cd19d5a14526335123a31963d090f91 Mon Sep 17 00:00:00 2001
From: Tyler Cipriani <tcipriani@wikimedia.org>
Date: Fri, 26 Jul 2019 15:09:38 -0600
Subject: [PATCH] helloworldoid: bump production image
Change-Id: I0d2e93d983b204534b5e7ba3273ff29c0a026991
---
helmfile.d/services/codfw/helloworldoid/values.yaml | 2 +-
helmfile.d/services/eqiad/helloworldoid/values.yaml | 2 +-
helmfile.d/services/staging/helloworldoid/values.yaml | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/helmfile.d/services/codfw/helloworldoid/values.yaml b/helmfile.d/services/codfw/helloworldoid/values.yaml
index bdfc6ed..6bb005f 100644
--- a/helmfile.d/services/codfw/helloworldoid/values.yaml
+++ b/helmfile.d/services/codfw/helloworldoid/values.yaml
@@ -30,7 +30,7 @@ main_app:
- version: 2019-07-23-155043-production
+ version: 2019-07-25-125909-production
diff --git a/helmfile.d/services/eqiad/helloworldoid/values.yaml b/helmfile.d/services/eqiad/helloworldoid/values.yaml
index bdfc6ed..6bb005f 100644
--- a/helmfile.d/services/eqiad/helloworldoid/values.yaml
+++ b/helmfile.d/services/eqiad/helloworldoid/values.yaml
@@ -30,7 +30,7 @@ main_app:
- version: 2019-07-23-155043-production
+ version: 2019-07-25-125909-production
diff --git a/helmfile.d/services/staging/helloworldoid/values.yaml b/helmfile.d/services/staging/helloworldoid/values.yaml
index eda1542..5e532a4 100644
--- a/helmfile.d/services/staging/helloworldoid/values.yaml
+++ b/helmfile.d/services/staging/helloworldoid/values.yaml
@@ -30,7 +30,7 @@ main_app:
- version: 2019-07-23-155043-production
+ version: 2019-07-25-125909-production
--
2.20.1
After merging this simple change, I'm ready to deploy!
Run a deployment
Deployment is accomplished via helmfile and is a few short commands:
you@your-laptop:~ $ ssh deployment.eqiad.wmnet
you@deploy1001:~ $ cd /srv/deployment-charts/helmfile.d/services/staging/helloworldoid
you@deploy1001:helloworldoid $ source .hfenv
you@deploy1001:helloworldoid $ helmfile apply
And that's it!
Results
The results speak for themselves: we have a much more satisfying and remarkable user experience with so little effort:
__________________________________________________________________________________________________________________________
/ ('-. .-. ('-. (`\ .-') /` _ .-') _ .-') _ ,---. \
| ( OO ) / _( OO) `.( OO ),' ( \( -O ) ( ( OO) ) | | |
| ,--. ,--.(,------.,--. ,--. .-'),-----. ,--./ .--. .-'),-----. ,------. ,--. \ .'_ | | |
| | | | | | .---'| |.-') | |.-') ( OO' .-. ' | | | ( OO' .-. '| /`. ' | |.-') ,`'--..._)| | |
| | .| | | | | | OO ) | | OO )/ | | | | | | | |, / | | | || / | | | | OO )| | \ '| | |
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| | | | | | `---.| | | | `' '-' '.-. | ,'. | `' '-' '| |\ \ | | | '--' /.--. |
| `--' `--' `------'`------' `------' `-----' ',/ '--' '--' `-----' `--' '--' `------' `-------' '--' |
\ Hi, I’d like to add you to my professional network on LinkedIn. /
--------------------------------------------------------------------------------------------------------------------------
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Timestamp: 2019-07-26T21:24:01.353Z