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Kubernetes configs for canonical websites

This repository contains the configuration files the Kubernetes deployments for some of our websites.

We are using jinja2 as a template system for our configurations. All the template values for our projects can be found under the sites folder.

Structure

We deploy our services into one of two namespaces:

  • staging: Services for our staging servers (there's usually one per production website)
  • production: Services for our production servers

Template system

All configurations for our projects can be found under the sites folder. Using the konf.py script, we generate the following Kubernetes objects:

  • service
  • deployment
  • ingress

E.g.:

./konf.py staging sites/canonical.com.yaml

Environment variables

These are added in this format:

env:
  - name: API_KEY
    value: someapikey

And for kubernetes secrets:

env:
  - name: API_KEY
    secretKeyRef:
      key: api-key
      name: name-of-api-key

Note that there is no valueFrom key, as is the case in kubernetes deployment configuration.

Deploying

Using create-project

When creating a new project, you can either copy an existing projects values file and modify the file as you want. Here is a document explaining all the possibles values:

Or use ./create-project. To auto-generate the files for a new project. Run ./create-project project.name and the tool will create the config files for you.

For example: ./create-project new-site.com

Will create:

  • /sites/new-site.com.yaml

To deploy a new service

E.g. to deploy the snapcraft.io service to staging from scratch:

# E.g. To deploy the snapcraft.io services to staging
./konf.py staging sites/snapcraft.io.yaml | kubectl apply --filename -

E.g. to deploy a specific docker image

# E.g. To deploy the snapcraft.io services to staging
./konf.py staging sites/snapcraft.io.yaml --tag a264efb326485 | kubectl apply --filename -

To update an existing service

Or to update an existing snapcraft.io service without changing the deployed image:

# E.g. for snapcraft.io
TAG_TO_DEPLOY=$(kubectl get deployment snapcraft-io --namespace staging -o jsonpath="{.spec.template.spec.containers[*].image}" | grep -P -o '(?<=:)[^:]*$')

./konf.py staging sites/snapcraft.io.yaml --tag $TAG_TO_DEPLOY | kubectl apply --filename -