Let Argo CD manage its own deployment

bootstrap/argocd-project.yaml

@@ -0,0 +1,39 @@
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: argocd
+  namespace: argocd
+spec:
+  description: Argo CD self-management
+  sourceRepos:
+  - https://code.brunner.ninja/feedc0de/homelab-gitops.git
+  - https://argoproj.github.io/argo-helm
+  destinations:
+  - namespace: argocd
+    server: https://kubernetes.default.svc
+  clusterResourceWhitelist:
+  - group: apiextensions.k8s.io
+    kind: CustomResourceDefinition
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRole
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRoleBinding
+  namespaceResourceWhitelist:
+  - group: ""
+    kind: ConfigMap
+  - group: ""
+    kind: Service
+  - group: ""
+    kind: ServiceAccount
+  - group: apps
+    kind: Deployment
+  - group: apps
+    kind: StatefulSet
+  - group: networking.k8s.io
+    kind: Ingress
+  - group: networking.k8s.io
+    kind: NetworkPolicy
+  - group: rbac.authorization.k8s.io
+    kind: Role
+  - group: rbac.authorization.k8s.io
+    kind: RoleBinding

bootstrap/argocd.yaml

@@ -0,0 +1,23 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: argocd
+  namespace: argocd
+spec:
+  project: argocd
+  source:
+    repoURL: https://code.brunner.ninja/feedc0de/homelab-gitops.git
+    targetRevision: main
+    path: apps/argocd
+    helm:
+      releaseName: argocd
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: argocd
+  syncPolicy:
+    automated:
+      enabled: true
+      prune: false
+      selfHeal: true
+    syncOptions:
+    - ServerSideApply=true

bootstrap/install-argocd.sh

@@ -0,0 +1,74 @@
+#!/bin/sh
+set -eu
+
+expected_context=kubernetes-admin@kubernetes
+current_context=$(kubectl config current-context)
+if [ "${current_context}" != "${expected_context}" ]; then
+  echo "Refusing recovery through unexpected context: ${current_context}" >&2
+  exit 1
+fi
+
+script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+repository_dir=$(dirname -- "${script_dir}")
+app_dir="${repository_dir}/apps/argocd"
+
+for command in helm kubectl openssl base64 ruby; do
+  if ! command -v "${command}" >/dev/null 2>&1; then
+    echo "Required command not found: ${command}" >&2
+    exit 1
+  fi
+done
+
+kubectl create namespace argocd --dry-run=client --output=yaml \
+  | kubectl apply --filename=-
+
+if ! kubectl --namespace argocd get secret argocd-secret >/dev/null 2>&1; then
+  kubectl --namespace argocd create secret generic argocd-secret
+fi
+if [ -z "$(kubectl --namespace argocd get secret argocd-secret --output='jsonpath={.data.server\.secretkey}')" ]; then
+  secret_key=$(openssl rand -hex 32)
+  secret_key_base64=$(printf '%s' "${secret_key}" | base64 | tr -d '\n')
+  secret_patch=$(mktemp)
+  chmod 600 "${secret_patch}"
+  printf '{"data":{"server.secretkey":"%s"}}\n' "${secret_key_base64}" > "${secret_patch}"
+  kubectl --namespace argocd patch secret argocd-secret \
+    --type=merge --patch-file="${secret_patch}" >/dev/null
+  rm -f "${secret_patch}"
+  unset secret_key secret_key_base64
+fi
+kubectl --namespace argocd label secret argocd-secret \
+  app.kubernetes.io/name=argocd-secret \
+  app.kubernetes.io/part-of=argocd --overwrite >/dev/null
+
+if ! kubectl --namespace argocd get secret argocd-notifications-secret >/dev/null 2>&1; then
+  kubectl --namespace argocd create secret generic argocd-notifications-secret
+fi
+if ! kubectl --namespace argocd get secret argocd-redis >/dev/null 2>&1; then
+  redis_password=$(openssl rand -hex 32)
+  kubectl --namespace argocd create secret generic argocd-redis \
+    --from-literal="auth=${redis_password}"
+  unset redis_password
+fi
+if ! kubectl --namespace argocd get secret argocd-oidc >/dev/null 2>&1; then
+  echo "Missing argocd/argocd-oidc; restore or provision it before recovery." >&2
+  exit 1
+fi
+
+helm dependency update "${app_dir}"
+set -- "${app_dir}"/charts/argo-cd-*.tgz
+if [ "$#" -ne 1 ] || [ ! -f "$1" ]; then
+  echo "Expected exactly one downloaded argo-cd chart archive" >&2
+  exit 1
+fi
+chart_archive=$1
+
+child_values=$(mktemp)
+trap 'rm -f "${child_values}"' EXIT HUP INT TERM
+ruby -ryaml -e 'puts YAML.dump(YAML.load_file(ARGV.fetch(0)).fetch("argo-cd"))' \
+  "${app_dir}/values.yaml" > "${child_values}"
+
+helm upgrade --install argocd "${chart_archive}" \
+  --namespace argocd \
+  --values "${child_values}" \
+  --wait \
+  --timeout 10m

bootstrap/install.sh

@@ -35,3 +35,9 @@ kubectl --namespace argocd wait application/metallb \
 kubectl --namespace argocd wait application/metallb \
   --for=jsonpath='{.status.health.status}'=Healthy \
   --timeout=5m
+kubectl --namespace argocd wait application/argocd \
+  --for=jsonpath='{.status.sync.status}'=Synced \
+  --timeout=10m
+kubectl --namespace argocd wait application/argocd \
+  --for=jsonpath='{.status.health.status}'=Healthy \
+  --timeout=10m

bootstrap/kustomization.yaml

@@ -1,6 +1,8 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
+- argocd-project.yaml
+- argocd.yaml
 - project.yaml
 - platform-project.yaml
 - sealed-secrets.yaml