26.4. 検出された条件のカスタマイズ
Node Problem Detector 設定マップを編集し、Node Problem Detector をログの文字列を監視するように設定できます。
Node Problem Detector 設定マップのサンプル
apiVersion: v1 kind: ConfigMap metadata: name: node-problem-detector data: docker-monitor.json: | 1 { "plugin": "journald", 2 "pluginConfig": { "source": "docker" }, "logPath": "/host/log/journal", 3 "lookback": "5m", "bufferSize": 10, "source": "docker-monitor", "conditions": [], "rules": [ 4 { "type": "temporary", 5 "reason": "CorruptDockerImage", 6 "pattern": "Error trying v2 registry: failed to register layer: rename /var/lib/docker/image/(.+) /var/lib/docker/image/(.+): directory not empty.*" 7 } ] } kernel-monitor.json: | 8 { "plugin": "journald", 9 "pluginConfig": { "source": "kernel" }, "logPath": "/host/log/journal", 10 "lookback": "5m", "bufferSize": 10, "source": "kernel-monitor", "conditions": [ 11 { "type": "KernelDeadlock", 12 "reason": "KernelHasNoDeadlock", 13 "message": "kernel has no deadlock" 14 } ], "rules": [ { "type": "temporary", "reason": "OOMKilling", "pattern": "Kill process \\d+ (.+) score \\d+ or sacrifice child\\nKilled process \\d+ (.+) total-vm:\\d+kB, anon-rss:\\d+kB, file-rss:\\d+kB" }, { "type": "temporary", "reason": "TaskHung", "pattern": "task \\S+:\\w+ blocked for more than \\w+ seconds\\." }, { "type": "temporary", "reason": "UnregisterNetDevice", "pattern": "unregister_netdevice: waiting for \\w+ to become free. Usage count = \\d+" }, { "type": "temporary", "reason": "KernelOops", "pattern": "BUG: unable to handle kernel NULL pointer dereference at .*" }, { "type": "temporary", "reason": "KernelOops", "pattern": "divide error: 0000 \\[#\\d+\\] SMP" }, { "type": "permanent", "condition": "KernelDeadlock", "reason": "AUFSUmountHung", "pattern": "task umount\\.aufs:\\w+ blocked for more than \\w+ seconds\\." }, { "type": "permanent", "condition": "KernelDeadlock", "reason": "DockerHung", "pattern": "task docker:\\w+ blocked for more than \\w+ seconds\\." } ] }
Node Problem Detector を設定するには、問題の状態およびイベントを追加するか、またはこれらを削除します。
テキストエディターで Node Problem Detector 設定マップを編集します。
$ oc edit configmap -n openshift-node-problem-detector node-problem-detector
ノードの状態またはイベントを必要に応じて削除、追加、または編集します。
{ "type": <`temporary` or `permanent`>, "reason": <free-form text describing the error>, "pattern": <log message to watch for> },以下に例を示します。
{ "type": "temporary", "reason": "UnregisterNetDevice", "pattern": "unregister_netdevice: waiting for \\w+ to become free. Usage count = \\d+" },変更を適用するために実行中の Pod を再起動します。Pod を再起動するために、すべての既存 Pod を削除できます。
# oc delete pods -n openshift-node-problem-detector -l name=node-problem-detector
Node Problem Detector 出力を標準出力 (stdout) および標準エラー出力 (stderr) に表示するには、以下を Node Problem Detector の DaemonSet に追加します。
spec: template: spec: containers: - name: node-problem-detector command: - node-problem-detector - --alsologtostderr=true 1 - --log_dir="/tmp" 2 - --system-log-monitors=/etc/npd/kernel-monitor.json,/etc/npd/docker-monitor.json 3
