本文涉及到的主要命令如下：
docker container inspect：查看容器的详细信息docker container log：查看容器的日志docker container stats：查看容器的实时统计
查看容器的详细信息 Link to heading
docker container inspect或docker inspect命令会显示容器的详细信息，默认以JSON格式输出：
➜ ~ docker container inspect 3f3c3d02c947
[
{
"Id": "3f3c3d02c9474ad8d152548d9db81bcd86d956e9686828b537a9a9708b631af2",
"Created": "2020-06-01T22:58:05.916162Z",
"Path": "/tini",
"Args": [
"--",
"/usr/local/bin/docker-entrypoint.sh",
"eswrapper"
],
...
}
...
]
默认的输出信息很多，可以通过-f, --format格式化输出：
➜ ~ docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' 3f3c3d02c947
172.17.0.2
➜ ~ docker inspect --format='{{.NetworkSettings.Networks.bridge.IPAddress}}' 3f3c3d02c947
172.17.0.2
➜ ~ docker inspect --format='{{.LogPath}}' 3f3c3d02c947
/var/lib/docker/containers/3f3c3d02c9474ad8d152548d9db81bcd86d956e9686828b537a9a9708b631af2/3f3c3d02c9474ad8d152548d9db81bcd86d956e9686828b537a9a9708b631af2-json.log
如果只想查看某个子节点，比如NetworkSettings下的Ports，因为Ports本身是个对象，默认只会显示节点中值的集合，可以使用模版函数json，将对象以json格式输出：
➜ ~ docker inspect --format='{{json .NetworkSettings.Ports}}' 3f3c3d02c947
{"9200/tcp":[{"HostIp":"0.0.0.0","HostPort":"9200"}],"9300/tcp":[{"HostIp":"0.0.0.0","HostPort":"9300"}]}
查看容器的运行日志 Link to heading
docker container logs或docker logs可以查看容器的日志。
该命令仅适用于使用
json-file和journald作为日志驱动的容器。
常用的参数说明如下：
--tail: 显示最新的多少行日志，默认是所有-f, --follow: 动态显示更新的日志-t, --timestap: 显示每行日志的时间戳details: 显示额外的详细信息--since: 仅显示某个时间点（比如：2020-06-02T10:23:37）之后的日志，或者使用相对值（42m表示42分钟）--until: 仅显示某个时间点（比如：2020-06-02T10:23:37）之前的日志，或者使用相对值（42m表示42分钟）
➜ ~ docker logs 3f3c3d02c947
{"type": "server", "timestamp": "2020-06-01T22:58:11,829Z", "level": "INFO", "component": "o.e.e.NodeEnvironment", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "using [1] data paths, mounts [[/ (overlay)]], net usable_space [49.5gb], net total_space [58.4gb], types [overlay]" }
{"type": "server", "timestamp": "2020-06-01T22:58:11,837Z", "level": "INFO", "component": "o.e.e.NodeEnvironment", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "heap size [1gb], compressed ordinary object pointers [true]" }
...
➜ ~ docker logs -f --tail 3 3f3c3d02c947
{"type": "server", "timestamp": "2020-06-01T22:58:27,353Z", "level": "INFO", "component": "o.e.x.i.a.TransportPutLifecycleAction", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "adding index lifecycle policy [slm-history-ilm-policy]", "cluster.uuid": "q8H8WMzpS6qMLzP1IgTjGQ", "node.id": "sTkmBkS4QwG4h4IaWBMzQQ" }
{"type": "server", "timestamp": "2020-06-01T22:58:27,480Z", "level": "INFO", "component": "o.e.l.LicenseService", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "license [d7cc442a-9316-4f91-8547-5c75384da38b] mode [basic] - valid", "cluster.uuid": "q8H8WMzpS6qMLzP1IgTjGQ", "node.id": "sTkmBkS4QwG4h4IaWBMzQQ" }
{"type": "server", "timestamp": "2020-06-01T22:58:27,482Z", "level": "INFO", "component": "o.e.x.s.s.SecurityStatusChangeListener", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "Active license is now [BASIC]; Security is disabled", "cluster.uuid": "q8H8WMzpS6qMLzP1IgTjGQ", "node.id": "sTkmBkS4QwG4h4IaWBMzQQ" }
➜ ~ docker logs -t --since '2020-06-01T22:58:27.483306900Z' 3f3c3d02c947
2020-06-01T22:58:27.483306900Z {"type": "server", "timestamp": "2020-06-01T22:58:27,482Z", "level": "INFO", "component": "o.e.x.s.s.SecurityStatusChangeListener", "cluster.name": "docker-cluster", "node.name": "3f3c3d02c947", "message": "Active license is now [BASIC]; Security is disabled", "cluster.uuid": "q8H8WMzpS6qMLzP1IgTjGQ", "node.id": "sTkmBkS4QwG4h4IaWBMzQQ" }
查看容器的实时统计 Link to heading
可以使用docker container stats或docker stats查看容器的运行状态。
➜ ~ docker stats
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
19469f79b8a4 kafka_zookeeper_1 0.14% 78.54MiB / 3.848GiB 1.99% 5.63kB / 3.15kB 0B / 0B 23
e69d55f4eb91 kafka_kafka_1 0.00% 0B / 0B 0.00% 0B / 0B 0B / 0B 0
3f3c3d02c947 vigilant_merkle 0.49% 1.283GiB / 3.848GiB 33.34% 1.73kB / 0B 0B / 0B 55
默认返回所有运行的容器的实时状态，不停刷新。主要参数有：
--all, -a: 返回所有容器的状态，包括已停止的容器，但是停止的容器没有状态数据--no-stream: 仅返回第一次的结果，不会动态地实时刷新--no-trunc: 数据不截断
也可以指定具体的容器ID，多个容器ID以空格分隔：
➜ ~ docker stats --no-trunc --no-stream 3f3c3d02c947
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
3f3c3d02c9474ad8d152548d9db81bcd86d956e9686828b537a9a9708b631af2 vigilant_merkle 0.46% 1.283GiB / 3.848GiB 33.35% 2.01kB / 0B 0B / 0B 55