83 lines
3 KiB
Bash
83 lines
3 KiB
Bash
#!/bin/bash
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# Tier-1 dispatch for metrics_server component operations.
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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cd "$SCRIPT_DIR"
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[ -f "${SCRIPT_DIR}/env-metrics_server" ] && source "${SCRIPT_DIR}/env-metrics_server"
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METRICS_SERVER_NAME="${METRICS_SERVER_NAME:-metrics-server}"
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METRICS_SERVER_NAMESPACE="${METRICS_SERVER_NAMESPACE:-kube-system}"
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METRICS_SERVER_PORT="${METRICS_SERVER_PORT:-4443}"
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CMD_TSK="${CMD_TSK:-${1:-install}}"
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source "${SCRIPT_DIR}/metrics_server-lib.sh"
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_resolve_kubeconfig() {
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if [ -n "${KUBECONFIG:-}" ] && [ -f "$KUBECONFIG" ]; then
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return
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fi
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for candidate in /var/lib/k0s/pki/admin.conf /etc/kubernetes/admin.conf /root/.kube/config; do
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if [ -f "$candidate" ]; then
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export KUBECONFIG="$candidate"
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return
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fi
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done
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echo "ERROR: kubeconfig not found — set KUBECONFIG explicitly" >&2; exit 1
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}
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_do_install() {
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for manifest in serviceaccount.yaml clusterrole.yaml clusterrolebinding.yaml rolebinding.yaml \
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deployment.yaml service.yaml apiservice.yaml; do
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local path="$SCRIPT_DIR/manifests/${manifest}"
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[ -f "$path" ] && _kubectl apply -f "$path"
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done
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echo "Waiting for ${METRICS_SERVER_NAME} pod to be ready..."
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_wait_for_pod 180
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echo "${METRICS_SERVER_NAME} installed in namespace ${METRICS_SERVER_NAMESPACE}"
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}
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_do_update() {
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_kubectl apply -f "$SCRIPT_DIR/manifests/deployment.yaml"
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_kubectl rollout restart "deployment/${METRICS_SERVER_NAME}" --namespace "$METRICS_SERVER_NAMESPACE"
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_wait_for_pod 180
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echo "${METRICS_SERVER_NAME} updated"
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}
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_do_delete() {
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for manifest in apiservice.yaml deployment.yaml service.yaml clusterrolebinding.yaml \
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clusterrole.yaml rolebinding.yaml serviceaccount.yaml; do
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local path="$SCRIPT_DIR/manifests/${manifest}"
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[ -f "$path" ] && _kubectl delete -f "$path" --ignore-not-found
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done
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echo "${METRICS_SERVER_NAME} deleted from namespace ${METRICS_SERVER_NAMESPACE}"
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}
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_do_restart() {
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_kubectl rollout restart "deployment/${METRICS_SERVER_NAME}" --namespace "$METRICS_SERVER_NAMESPACE"
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_wait_for_pod 180
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echo "${METRICS_SERVER_NAME} restarted"
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}
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_do_health() {
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_kubectl wait pod \
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--namespace "$METRICS_SERVER_NAMESPACE" \
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--selector "app=metrics-server" \
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--for=condition=Ready \
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--timeout="10s" >/dev/null 2>&1 \
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&& echo "HEALTHY: ${METRICS_SERVER_NAME} pod ready" \
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|| { echo "UNHEALTHY: ${METRICS_SERVER_NAME} pod not ready" >&2; exit 1; }
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}
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_resolve_kubeconfig
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case "$CMD_TSK" in
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install) [ -f "$SCRIPT_DIR/run-init.sh" ] && exec bash "$SCRIPT_DIR/run-init.sh"; _do_install ;;
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update) [ -f "$SCRIPT_DIR/run-update.sh" ] && exec bash "$SCRIPT_DIR/run-update.sh"; _do_update ;;
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delete) [ -f "$SCRIPT_DIR/run-delete.sh" ] && exec bash "$SCRIPT_DIR/run-delete.sh"; _do_delete ;;
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restart) [ -f "$SCRIPT_DIR/run-restart.sh" ] && exec bash "$SCRIPT_DIR/run-restart.sh"; _do_restart ;;
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health) _do_health ;;
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*) echo "ERROR: unknown CMD_TSK='${CMD_TSK}'. Valid: install|update|delete|restart|health" >&2; exit 1 ;;
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esac
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