dotfiles/.local/bin/scripts/stack-template

#!/bin/sh -e
if test $# -lt 1; then
  echo "You should be in the root apps folder."
  echo "Usage: $0 <app> [subdomain] [repo] [namespace]"
  exit 1
fi

app=$1
subdomain=${2:-$app}
repo=${3:-$app}
namespace=${4:-stackspout}

cat <<EOF >>"$subdomain-kustomization.yaml"
---
apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
kind: Kustomization
metadata:
  name: add-${subdomain}
  namespace: flux-system
spec:
  interval: 10m
  prune: true
  path: ./apps/${subdomain}
  sourceRef:
    kind: GitRepository
    name: ${namespace}
EOF

if test "$(basename "$PWD")" != "${subdomain}"
then mkdir -p "${subdomain}"
     cd "${subdomain}"
fi

# Values

cat <<EOF >>"$app-kustomization.yaml"
---
apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
kind: Kustomization
metadata:
  name: ${app}
  namespace: flux-system
spec:
  interval: 5m
  retryInterval: 2m
  timeout: 10m
  wait: true
  prune: true
  path: ./apps/${subdomain}/${app}
  sourceRef:
    kind: GitRepository
    name: ${namespace}
  dependsOn:
    - name: flux
    - name: local-path-provisioner
    - name: ${app}-secrets
    - name: nginx
    - name: single-sign-on
  postBuild:
    substituteFrom:
      - kind: Secret
        name: stackspin-cluster-variables
      - kind: ConfigMap
        name: stackspin-${app}-kustomization-variables
      - kind: Secret
        name: stackspin-${app}-variables
      # OIDC
      - kind: Secret
        name: stackspin-${app}-oauth-variables
      - kind: ConfigMap
        name: stackspin-single-sign-on-kustomization-variables
EOF

if mkdir "$app"
then
cat <<EOF >"$app/$app-oauth-client.yaml"
apiVersion: hydra.ory.sh/v1alpha1
kind: OAuth2Client
metadata:
  name: $app-oauth-client
  # Has to live in the same namespace as the stackspin-$app-oauth-variables secret
  namespace: flux-system
spec:
  # TODO copied from wekan: https://github.com/wekan/wekan/wiki/Keycloak
  grantTypes:
    - authorization_code
    - refresh_token
    - client_credentials
    - implicit
  responseTypes:
    - id_token
    - code
  scope: "openid profile email stackspin_roles"
  secretName: stackspin-$app-oauth-variables
  #redirectUris:
  #  - https://\${${app}_domain}/oauth/openid/
  #tokenEndpointAuthMethod: client_secret_post
EOF
cat <<EOF >"$app/$app-release.yaml"
apiVersion: helm.toolkit.fluxcd.io/v2beta1
kind: HelmRelease
metadata:
  name: $app
  namespace: $namespace
spec:
  releaseName: $app
  chart:
    spec:
      chart: $app
      version: 1.0 # TODO
      sourceRef:
        kind: HelmRepository
        name: $repo
        namespace: flux-system
  interval: 5m
  valuesFrom:
    - kind: ConfigMap
      name: stackspin-$app-values
      optional: false
    # Allow overriding values by ConfigMap or Secret
    - kind: ConfigMap
      name: stackspin-$app-override
      optional: true
    - kind: Secret
      name: stackspin-$app-override
      optional: true
EOF
cat <<EOF >"$app/$app-values-configmap.yaml"
apiVersion: v1
kind: ConfigMap
metadata:
  name: stackspin-$app-values
  namespace: $namespace
data:
  values.yaml: |
    # TODO verify structure matches chart
    commonLabels:
      stackspin.net/backupSet: "${app}"
    podLabels:
      stackspin.net/backupSet: "${app}"
    # TODO Configure PVC for data & database including backup labels
    podAnnotations:
      backup.velero.io/backup-volumes: "data"
    persistence:
      enabled: true
      existingClaim: "${app}-data"

    ingress:
      enabled: true
      # Elaborate style
      annotations:
        kubernetes.io/tls-acme: "true"
      hosts:
        - host: "\${${app}_domain}"
          paths:
             - path: /
               pathType: Prefix
      tls:
        - secretName: $app-tls
          hosts:
            - "\${${app}_domain}"
      # Bitnami style
      hostname: "\${${app}_domain}"
      tls: true
      certManager: true
    # TODO Adjust $app Mailing config
    #    mailer:
    #      enabled: "\${outgoing_mail_enabled}"
    #      host: "\${outgoing_mail_smtp_host}"
    #      port: "\${outgoing_mail_smtp_port}"
    #      username: "\${outgoing_mail_smtp_user}"
    #      password: "\${outgoing_mail_smtp_password}"
    #      fromemail: "\${outgoing_mail_from_address}"
    # TODO Adjust $app OpenID Connect Single Sign-On Configuration
    #    - name: Stackspin
    #      key: "\${client_id}"
    #      secret: "\${client_secret}"
    #      issuer: "https://\${hydra_domain}"
    #      autoDiscoverUrl: 'https://\${hydra_domain}/.well-known/openid-configuration'
EOF
cat <<EOF >"$app/$app-pvc.yaml"
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: $app-data
  namespace: $namespace
  labels:
    stackspin.net/backupSet: "$app"
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 2Gi
  storageClassName: local-path
EOF
fi

# Secrets

cat <<EOF >>"$app-secrets-kustomization.yaml"
---
apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
kind: Kustomization
metadata:
  name: ${app}-secrets
  namespace: flux-system
spec:
  interval: 5m
  timeout: 4m
  wait: true
  prune: true
  path: ./apps/${subdomain}/${app}-secrets
  sourceRef:
    kind: GitRepository
    name: ${namespace}
  dependsOn:
    - name: flux
    - name: secrets-controller
  postBuild:
    substituteFrom:
      - kind: Secret
        name: stackspin-cluster-variables
EOF
if mkdir "$app-secrets"
then
cat <<EOF >"$app-secrets/$app-kustomization-variables.yaml"
apiVersion: v1
kind: ConfigMap
metadata:
  name: stackspin-$app-kustomization-variables
  namespace: flux-system
data:
  ${app}_domain: ${subdomain}.\${domain}
EOF
cat <<EOF >>"$app-secrets/$app-variables.yaml"
---
apiVersion: secretgenerator.mittwald.de/v1alpha1
kind: StringSecret
metadata:
  name: stackspin-$app-variables
  namespace: flux-system
spec:
  fields:
  - fieldname: password
EOF
cat <<EOF >"$app-secrets/$app-oauth-secret.yaml"
---
apiVersion: secretgenerator.mittwald.de/v1alpha1
kind: StringSecret
metadata:
  name: stackspin-$app-oauth-variables
  namespace: flux-system
spec:
  data:
    client_id: $app
  fields:
  - fieldName: client_secret
    length: "32"
EOF
fi

../generate-kustomizations.sh .
echo "TODO: Obtain chart version, check configmap, adjust secrets" >&2
exec $SHELL