https://github.com/kuuji/gitops

https://github.com/kuuji/gitops

Last synced: 6 days ago
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• Host: GitHub
• URL: https://github.com/kuuji/gitops
• Owner: kuuji
• Created: 2021-12-18T22:09:37.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2022-02-06T01:42:25.000Z (almost 3 years ago)
• Last Synced: 2024-11-07T14:29:54.452Z (about 2 months ago)
• Size: 160 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Argocd

## gitops repo structure

```

clusters

    {cluster_name}

        system 

        ops

        game

        etc.

shared

    system

        istio

        cert-manager

    ops

        nginx

            nginx-header_helm.yaml

    game

    etc.

```

`clusters/{cluster_name}/system` contains the system components that are not shared. For example argocd only exists on the argocd cluster

gha-controller only exists on the ci cluster

etc.

`shared/system/` contains applicationSets, those resources generate Application for every cluster according to some parameters (cluster/git files/list/more complex if we want to). It doesn't have to be on all clusters, but if it's more than 1 it's useful to have an applicationSet for it. 

These are the things we always install and have very little variation between clusters. For example istio, cert-manager, etc.

We should aim to have as much as possible here.

`shared/ops/nginx/nginx_helm.yaml` is an applicationSet that takes a remote helm chart and installs it in a list of cluster. values can be templated directly in the applicationSet. This design while being the most straightforward does not allow to permanently override values for a given cluster. It's good for things that have very little variation between clusters.

`shared/ops/nginx/nginx_helm_umbrella.yaml` is an applicationSet that looks for a helm chart in `clusters/{cluster_name}/ops/nginx`

This folders contains:

- A Chart.yaml file with a dependency to a chart that installs nginx-header

- A values.yaml file that has values specific to the cluster

terraform

- create cluster

- create cluster dependencies

    - acm

    - iam role

- install argo via helm provider

- install alb ingress

- bootstrap argo

  - create an argo application that looks at the clusters/argo folder in gitops

  - clusters/argo folder contains bootstrap.yaml <- from now on we manage argo via argo

  - clusters/argo/system/argocd contains all argocd required config

  - clusters/argo/root.yaml creates an application that looks at shared/

  - shared/system/istio contains everything to bootstrap istio on any cluster