Monthly Archives: June 2022

mapping dns via argocd applicationset and external-dns

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When using ArgoCD and an ApplicationSet to deploy external-dns to all clusters, as part of a grouping of addons common to all clusters, it can be useful to configure the DNS filter using variables:

        helm:
          releaseName: "external-dns"
          parameters:
          - name: external-dns.domainFilters
            value: "{ {{name}}.k.home.net }"
          - name: external-dns.txtOwnerId
            value: '{{name}}'
          - name: external-dns.rfc2136.zone
            value: '{{name}}.k.home.net'

This will place the cluster name as part of the dns name used by external-dns, resulting in the following type of FQDNs used by clusters:

app.dev.k.home.net
app.test.k.home.net
app.prod.k.home.net

Though, for my core cluster with components used by all clusters, I like to leave out the cluster name so all core components are at the k.<domain> level:

argocd.k.home.net
harbor.k.home.net
keycloak.k.home.net

git-based homedir folder structure (and git repos) using lessons learned

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After reinstalling everything including my main linux workbench system it became the right time to finally get my home directory into git.  Taking all lessons learned up till this point it seemed a good idea to cleanup my git repo strategy as well.  The revised strategy:

[Git repos]

Personal:
- workbench-<user>

Team (i for infrastructure):
- i-ansible
- i-jenkins (needed ?)
- i-kubernetes (needed?)
- i-terraform
- i-tanzu

Project related: (source code)
- p-lido (use tagging dev/test/prod)
    doc
    src

Jenkins project pipelines:
- j-lifecycle-cluster-decommission
- j-lifecycle-cluster-deploy
- j-lifecycle-cluster-update
- j-lido-dev
- j-lido-test
- j-lido-prod

Cluster app deployments:
- k-core
- k-dev
- k-exp
- k-prod

[Folder structure]

i-ansible (git repo)
  doc
  bin
  plays ( ~/a )

i-jenkins (git repo) (needed ?)
  doc
  bin
  pipelines ( ~/j )

i-kubernetes (git repo) (needed ?)
  doc
  bin
  manage ( ~/k )
  templates

i-terraform (git repo)
  doc
  bin
  plans (~/p)
    k-dev

i-tanzu (git repo)
  doc
  bin
  application.yaml (-> appofapps)
  apps (~/t)
    appofapps/ (inc all clusters)
    k-dev/cluster.yaml

src
  <gitrepo>/<user> (~/mysrc) (these are each git repos)
  <gitrepo>/<team> (~/s) (these are each git repos)
    j-lifecycle-cluster-decommission
    j-lifecycle-cluster-deploy
    - deploy cluster
    - create git repo
    - create adgroups
    - register with argocd global
    j-lifecycle-cluster-update
    j-lido-dev
    j-lido-test
    j-lido-prod
    k-dev
      application.yaml (-> appofapps)
      apps
        appofapps/ (inc all apps)
    k-exp
      application.yaml (-> appofapps)
      apps
        appofapps/ (inc all apps)
    k-prod
      application.yaml (-> appofapps)
      apps
        appofapps/ (inc all apps)

workbench-<user> (git repo)
  doc
  bin