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Project description
This CLI provides an opinionated, high-level wrapper for the “Autobahn” deployment API:
It only provides high-level commands
Only support what CI/CD pipelines need
Low-level access to Kubernetes provided by zkubectl
It uses Mustache for templating
Familiar to Zalando users: we already use it in Senza
Language-agnostic: users could switch to other tools without changing their manifests
Steps required by CI/CD Pipeline
Apply stateful resources
Cloud Formation templates
Kubernetes manifests
Should be possible for a whole directory
Create Kubernetes deployment
Switch “traffic” / scale deployments pod by pod
Needs to check pod “readyness”
Delete old deployments
Scale deployment (manually triggered)
Why another CLI?
The CI/CD pipeline could also call the “Autobahn” deployment API directly, but:
CI/CD pipeline (Jenkinsfile) would contain a lot of code and logic to interact with Autobahn API directly
Hard to test interaction with Autobahn API without running CI/CD (Jenkins)
No standard templating for Kubernetes manifests — first approach relied on another 3rd party tool (sigil)
Switching to another CI/CD would require reimplementing logic from Jenkinsfile
Usage
All commands interacting with the “Autobahn” deployment API either need the --execute flag (for immediate approval and execution) or additional calls to approve and execute.
$ sudo pip3 install -U zalando-deploy-cli
$ zdeploy configure \
--deploy-api=https://deploy-api.example.org \
--aws-account=aws:7.. \
--aws-region=eu-central-1 \
--kubernetes-cluster=aws:7..:kube-1
$ zdeploy apply ./apply/my-service.yaml --execute \
application=kio version=cd53 release=12
$ zdeploy create-deployment deployment.yaml kio cd53 12 --execute
$ zdeploy wait-for-deployment kio cd53 12
$ zdeploy switch-deployment kio cd53 12 2/10 --execute
$ zdeploy wait-for-deployment kio cd53 12
$ zdeploy switch-deployment kio cd53 12 3/10 --execute
$ # ..
$ zdeploy switch-deployment kio cd53 12 10/10 --execute
$ zdeploy delete-old-deployments kio cd53 12 --execute
$ zdeploy scale-deployment kio cd53 12 15 --execute # manual scaling
You can also just use the Mustache template interpolation manually:
$ zdeploy render-template my-manifest.yaml foo=bar var2=123
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