kubernetes 查看pod 对应的容器日志

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本文链接： https://blog.csdn.net/dengxiafubi/article/details/94170841

１．pod若处于运行状态，则通过kubectl logs 即可

[root@node-1 ~]# kubectl logs node-exporter-2f5ll -c node-exporter -n openstack
time="2019-06-26T01:00:30Z" level=info msg="Starting node_exporter (version=0.15.0, branch=HEAD, revision=6e2053c557f96efb63aef3691f15335a70baaffd)" source="node_exporter.go:43"
time="2019-06-26T01:00:30Z" level=info msg="Build context (go=go1.9.1, user=root@168089f37ad9, date=20171006-11:33:58)" source="node_exporter.go:44"
time="2019-06-26T01:00:30Z" level=info msg="Enabled collectors:" source="node_exporter.go:50"
time="2019-06-26T01:00:30Z" level=info msg=" - ipvs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - arp" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - xfs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - bcache" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - mountstats" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - stat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - timex" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - netdev" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - netstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - diskstats" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - zfs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - textfile" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - uname" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - hwmon" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - cpu" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - loadavg" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - meminfo" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - conntrack" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - edac" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - infiniband" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - filefd" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - time" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - mdadm" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - sockstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - filesystem" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - vmstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - entropy" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - wifi" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg="Listening on :9100" source="node_exporter.go:76"
time="2019-06-26T01:24:50Z" level=error msg="ERROR: xfs collector failed after 0.027436s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-63/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-27T11:00:12Z" level=error msg="ERROR: xfs collector failed after 0.418834s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-149/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T02:37:34Z" level=error msg="ERROR: xfs collector failed after 0.187959s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-27/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T06:41:01Z" level=error msg="ERROR: xfs collector failed after 0.039895s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-36/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T06:50:34Z" level=error msg="ERROR: xfs collector failed after 0.038196s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-206/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T07:18:53Z" level=error msg="ERROR: xfs collector failed after 0.036079s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-78/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T07:54:27Z" level=error msg="ERROR: xfs collector failed after 0.027663s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-190/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T11:34:29Z" level=error msg="ERROR: xfs collector failed after 0.027551s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-128/stats/stats: no such file or directory" source="collector.go:123"

２．若pod处于init状态，则需要通过docker ps查看

(1) 获取对应的pod name

[root@node-1 ~]# kubectl get pods -n openstack -o wide | grep node-exporter | grep node-1
node-exporter-2f5ll                              5/5       Running   0          3d        10.20.0.4      node-1

(2) 通过docker ps 获取该pod的中的CONTAINER ID

[root@node-1 ~]# docker ps | grep node-exporter-2f5ll
ba0c7a3d5c41        hub.easystack.io/production/ipmi-exporter@sha256:46319b571ca730b7df926dd630bff5060e587694a6321e360016c1785840d98b                                        "/ipmi_exporter"         3 days ago          Up 3 days                               k8s_ipmi-exporter_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0
039d4f45d537        hub.easystack.io/production/escloud-linux-source-event-monitor@sha256:d25907f8486f1914fa8f94a924c7723d09cd93b226bb4759d9e47b4322805b09                   "/tmp/eventmonitor..."   3 days ago          Up 3 days                               k8s_event-monitor_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0
5e250c413ba6        hub.easystack.io/production/escloud-linux-source-busybox@sha256:dd6e26d988996ca6ba42945dcf540dfeb15c71bd64ebe7c881db197452cb1486                         "/tmp/cronjob.sh"        3 days ago          Up 3 days                               k8s_node-script-collector_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0
9092785e81f0        hub.easystack.io/production/smartmon-collector@sha256:10849369c5567a44e19cffeeb6b12cdfa45c52448ee10d824863b9f0b8094bf1                                   "/opt/node-exporte..."   3 days ago          Up 3 days                               k8s_smartmon-collector_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0
ff245b8e8e08        hub.easystack.io/production/node-exporter@sha256:57d9b335b593e4d0da1477d7c5c05f23d9c3dc6023b3e733deb627076d4596ed                                        "/bin/node_exporte..."   3 days ago          Up 3 days                               k8s_node-exporter_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0
46ffa8f3d0c9        hub.easystack.io/captain/pause-amd64:3.0                                                                                                                 "/pause"                 3 days ago          Up 3 days                               k8s_POD_node-exporter-2f5ll_openstack_18ccaaf8-97ad-11e9-a253-fa163e801c84_0

(3) 通过docker log获取对应的日志信息

[root@node-1 ~]# docker logs ff245b8e8e08
time="2019-06-26T01:00:30Z" level=info msg="Starting node_exporter (version=0.15.0, branch=HEAD, revision=6e2053c557f96efb63aef3691f15335a70baaffd)" source="node_exporter.go:43"
time="2019-06-26T01:00:30Z" level=info msg="Build context (go=go1.9.1, user=root@168089f37ad9, date=20171006-11:33:58)" source="node_exporter.go:44"
time="2019-06-26T01:00:30Z" level=info msg="Enabled collectors:" source="node_exporter.go:50"
time="2019-06-26T01:00:30Z" level=info msg=" - ipvs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - arp" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - xfs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - bcache" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - mountstats" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - stat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - timex" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - netdev" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - netstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - diskstats" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - zfs" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - textfile" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - uname" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - hwmon" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - cpu" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - loadavg" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - meminfo" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - conntrack" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - edac" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - infiniband" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - filefd" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - time" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - mdadm" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - sockstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - filesystem" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - vmstat" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - entropy" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg=" - wifi" source="node_exporter.go:52"
time="2019-06-26T01:00:30Z" level=info msg="Listening on :9100" source="node_exporter.go:76"
time="2019-06-26T01:24:50Z" level=error msg="ERROR: xfs collector failed after 0.027436s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-63/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-27T11:00:12Z" level=error msg="ERROR: xfs collector failed after 0.418834s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-149/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T02:37:34Z" level=error msg="ERROR: xfs collector failed after 0.187959s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-27/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T06:41:01Z" level=error msg="ERROR: xfs collector failed after 0.039895s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-36/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T06:50:34Z" level=error msg="ERROR: xfs collector failed after 0.038196s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-206/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T07:18:53Z" level=error msg="ERROR: xfs collector failed after 0.036079s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-78/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T07:54:27Z" level=error msg="ERROR: xfs collector failed after 0.027663s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-190/stats/stats: no such file or directory" source="collector.go:123"
time="2019-06-28T11:34:29Z" level=error msg="ERROR: xfs collector failed after 0.027551s: failed to retrieve XFS stats: open /sys/fs/xfs/dm-128/stats/stats: no such file or directory" source="collector.go:123"

当然，以上示例是运行正常的容器日志