Hydrate Kubernetes module

[tonirvega]

Motivation

We need to implement a new module in order to render an umbrella or simple chart to a wet repository target.

Requirements

• The module can render a private helm chart
  • Test with azure ACR: https://learn.microsoft.com/en-us/azure/container-registry/container-registry-helm-repos

Main interface

• Run function:

  • params
  • affectedPaths
  • repository-dir
  • pr_number || repository_caller
  • for each app/sys-service affected folder, the render function will be executed
  • RenderApp n times
  • Create branch if not exists with format <cluster>-<tenant>-<env>-<repository_caller|pr_number>
  • Create Pr
    • With labels <cluster> <tenant> <env> <service-a> <service-b>...
    • Add reviewers

• RenderApp function:

  • params
  • basePath -> apps
  • cluster
  • tenant
  • env
  • repository-dir
  • checkout deployment branch
  • checkout pr/master
  • produce previous_images.yaml
  • produce new_images.yaml
  • helmfile template
  • separate files with format ..yml
  • verify namespace

• CreatePr -> signed commits

  • This function comes from another specific module for Github integrations

• RenderSysService

  • params
  • basePath -> sys_services
  • cluster
  • app
  • repository-dir
  • checkout deployment branch
  • checkout pr/master
  • helmfile template
  • separate files with format ..yml
  • verify namespace

• The auth secret must be a property of the struct

Final render structure

• deployment branch

.
├── <apps>/
│   └── <cluster>/
│       └── <tenant>/
│               └── <env>/
│                   ├── Artifact.a.yaml
│                   └── ... 
└── <sys_services>/
    └── <cluster>/
        └── <app>/
            ├── Artifact.a.yaml
            └── ... 

[tonirvega]

# corpme-ovac-dev.yaml
---
name: ovac
chart:
  name: my-umbrella
  version: 1.0.0
repository: "azure.com/charts"
platform: "corpme-pro-aks"
type: kubernetes
source: Remote
valueFiles:
  - github.com/mycode-repo-a
  - github.com/mycode-repo-b
  - github.com/mycode-repo-c
  - github.com/mycode-repo-d
---

.github/
  deployments/
    corpme-pro-aks/
      tenant/
        ovac/
          dev/
            values.yaml

# state-ovac
cluster/
  tenant/
    env/
      values.yaml 

# state-aks
  cluster/
    namespaces/
    networkpolicies/
    app/
      values.yaml