release: add kube-prometheus-stack migration script

Author: anders-elastisys

migration/v0.50/apply/10-kube-prometheus-stack.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ROOT="$(readlink -f "$(dirname "${0}")/../../../")"
+
+source "${ROOT}/scripts/migration/lib.sh"
+
+run() {
+  case "${1:-}" in
+  execute)
+    chart_version=$(yq '.version' "${ROOT}/helmfile.d/upstream/prometheus-community/kube-prometheus-stack/Chart.yaml")
+    clusters=("${CK8S_CLUSTER}")
+    if [[ "${CK8S_CLUSTER}" == "both" ]]; then
+      clusters=("wc" "sc")
+    fi
+
+    for cluster in "${clusters[@]}"; do
+      current_version=$(helm_do "${cluster}" get metadata -n monitoring kube-prometheus-stack -ojson | jq -r '.version')
+
+      log_info "Upgrading kube-prometheus-stack on ${cluster}: ${current_version} -> ${chart_version}"
+
+      log_info "  - Checking if kube-prometheus-stack CRDs need to be upgraded on ${cluster}"
+      if [[ "${current_version}" != "${chart_version}" ]]; then
+        log_info "  - Replace kube-prometheus-stack CRDs on ${cluster}"
+        kubectl_do "${cluster}" apply --server-side --force-conflicts -f "${ROOT}/helmfile.d/upstream/prometheus-community/kube-prometheus-stack/charts/crds/crds"
+      else
+        log_info "  - CRDs up-to-date on ${cluster}, skipping"
+      fi
+
+      log_info "  - Upgrade kube-prometheus-stack on ${cluster}"
+      helmfile_upgrade "${cluster}" app=prometheus
+    done
+    ;;
+  rollback)
+    log_warn "rollback not implemented"
+    ;;
+  *)
+    log_fatal "usage: \"${0}\" <execute|rollback>"
+    ;;
+  esac
+}
+
+run "${@}"

migration/v0.50/apply/80-apply.sh

@@ -9,6 +9,7 @@ source "${ROOT}/scripts/migration/lib.sh"
 # Example: "app!=something"
 declare -a skipped
 skipped=(
+  app=prometheus
 )
 declare -a skipped_sc
 skipped_sc=(