85 lines
2.6 KiB
Markdown
85 lines
2.6 KiB
Markdown
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## 对应关系总结
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| Linux 命令 | kubectl logs 等效命令 |
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|---------------:|---------------------|
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| cat logfile | `kubectl logs <pod-name>` |
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| tail -n 10 | `kubectl logs --tail=10 <pod-name>` |
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| tail -f | `kubectl logs -f <pod-name>` |
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| head -n 10 | `kubectl logs --tail=1000 <pod-name> \| head -n 10` |
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| grep "error" | `kubectl logs <pod-name> \| grep "error"` |
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> 说明：`head` 在 kubectl 中没有直接等价参数，常用方法是获取较多末尾行再用 `head` 截取，或在集群外使用日志聚合/查询工具。
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## 查看 Pod 日志（示例：pod=test-flymoon-admin-deployment-964fb6b74-ns4br，namespace=`test-lessie`）
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显示所有日志内容（等同于 cat）
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```bash
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kubectl logs test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看最后 10 行（等同于 tail -n 10）
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```bash
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kubectl logs --tail=10 test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看最后 50 行
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```bash
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kubectl logs --tail=50 test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看前 10 行（等同于 head -n 10）
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```bash
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kubectl logs --tail=1000 test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie | head -n 10
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```
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实时跟踪日志（等同于 tail -f）
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```bash
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kubectl logs -f test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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从最后 10 行开始实时跟踪
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```bash
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kubectl logs -f --tail=10 test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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实时跟踪并显示时间戳
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```bash
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kubectl logs -f --timestamps test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看最近 1 小时的日志
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```bash
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kubectl logs --since=1h test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看最近 10 分钟的日志
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```bash
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kubectl logs --since=10m test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看指定时间以来的日志（使用 RFC3339 时间格式）
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```bash
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kubectl logs --since=2024-01-15T10:00:00Z test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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查看之前实例的日志（Pod 重启后）
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```bash
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kubectl logs --previous test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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只查看特定容器的日志（Pod 有多个容器时）
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```bash
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kubectl logs -c <container-name> test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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带时间戳显示
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```bash
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kubectl logs --timestamps test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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限制日志字节数
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```bash
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kubectl logs --limit-bytes=10240 test-flymoon-admin-deployment-964fb6b74-ns4br -n test-lessie
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```
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