26.4. 自定义依赖条件
您可以通过编辑 Node Problem Detector 配置映射来配置 Node Problem Detector 来监控任何日志字符串。
节点问题检测程序配置映射示例
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\\." } ] }
要配置节点问题检测程序，添加或删除问题条件和事件。
使用文本编辑器编辑 Node Problem Detector 配置映射。
$ oc edit configmap -n openshift-node-problem-detector node-problem-detector
根据需要删除、添加或编辑任何节点状况或事件。
{ "type": <`temporary` or `permanent`>, "reason": <free-form text describing the error>, "pattern": <log message to watch for> },例如：
{ "type": "temporary", "reason": "UnregisterNetDevice", "pattern": "unregister_netdevice: waiting for \\w+ to become free. Usage count = \\d+" },重启正在运行的 pod 以应用更改。要重启 pod，您可以删除所有现有的 pod：
# oc delete pods -n openshift-node-problem-detector -l name=node-problem-detector
要将节点问题检测程序输出显示到标准输出(stdout)和标准错误(stderr)，请在 Node Problem Detector 的 DaemonSet 中添加以下内容：
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
