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: |
{
"plugin": "journald",
"pluginConfig": {
"source": "docker"
},
"logPath": "/host/log/journal",
"lookback": "5m",
"bufferSize": 10,
"source": "docker-monitor",
"conditions": [],
"rules": [
{
"type": "temporary",
"reason": "CorruptDockerImage",
"pattern": "Error trying v2 registry: failed to register layer: rename /var/lib/docker/image/(.+) /var/lib/docker/image/(.+): directory not empty.*"
}
]
}
kernel-monitor.json: |
{
"plugin": "journald",
"pluginConfig": {
"source": "kernel"
},
"logPath": "/host/log/journal",
"lookback": "5m",
"bufferSize": 10,
"source": "kernel-monitor",
"conditions": [
{
"type": "KernelDeadlock",
"reason": "KernelHasNoDeadlock",
"message": "kernel has no deadlock"
}
],
"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=true1 - --log_dir="/tmp"2 - --system-log-monitors=/etc/npd/kernel-monitor.json,/etc/npd/docker-monitor.json3