怎么查看docker停止容器占用的内存信息
方法一：使用 docker system df 命令
docker system df 命令可以显示 Docker 使用的磁盘空间，包括镜像、容器和数据卷的占用情况。
运行命令：
1 | docker system df |
输出示例：
1 2 3 4 5 | TYPE TOTAL ACTIVE SIZE RECLAIMABLEImages 10 5 5.00GB 2.50GB (50%)Containers 20 10 1.00GB 500MB (50%)Local Volumes 5 3 500MB 200MB (40%)Build Cache 0 0 0B 0B |
方法二：使用 docker inspect 命令
docker inspect 命令可以查看容器的详细信息，包括其状态和资源使用情况。
获取所有停止的容器的 ID：
1 | docker ps -a -q --filter status=exited |
查看某个停止的容器的详细信息：
1 | docker inspect <container_id> |
解析输出：
在输出的 JSON 中，查找 SizeRw 和 SizeRootFs 字段，这些字段分别表示容器的可写层大小和根文件系统的总大小。
方法三：使用 docker system prune 命令
虽然 docker system prune 命令主要用于清理未使用的资源，但它也可以帮助你了解哪些资源可以被回收。
运行命令：
1 | docker system prune |
输出示例：
1 2 3 4 5 6 7 | WARNING! This will remove: - all stopped containers - all networks not used by at least one container - all dangling images - all build cacheAre you sure you want to continue? [y/N] yTotal reclaimed space: 2.50GB |
方法四：使用 du 命令
你也可以直接在宿主机上使用 du 命令来查看 Docker 目录的磁盘使用情况。
查找 Docker 存储目录：
默认情况下，Docker 存储目录位于 /var/lib/docker。
运行 du 命令：
1 | sudo du -h --max-depth=1 /var/lib/docker |
输出示例：
1 2 3 4 | 4.0K /var/lib/docker/containers1.0G /var/lib/docker/image500M /var/lib/docker/volumes5.0G /var/lib/docker |
综合示例
假设你有一个停止的容器 ID 为 abc123，你可以按照以下步骤查看其占用的内存：
获取容器的详细信息：
1 | docker inspect abc123 |
解析输出：
在输出的 JSON 中，查找 SizeRw 和 SizeRootFs 字段：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | { "Id": "abc123", "Created": "2023-10-01T12:34:56.789Z", "Path": "/bin/bash", "Args": [], "State": { "Status": "exited", "Running": false, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 0, "ExitCode": 0, "Error": "", "StartedAt": "2023-10-01T12:34:56.789Z", "FinishedAt": "2023-10-01T12:35:00.789Z" }, "Image": "sha256:1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "ResolvConfPath": "/var/lib/docker/containers/abc123/resolv.conf", "HostnamePath": "/var/lib/docker/containers/abc123/hostname", "HostsPath": "/var/lib/docker/containers/abc123/hosts", "LogPath": "/var/lib/docker/containers/abc123/abc123-json.log", "Name": "/my_container", "RestartCount": 0, "Driver": "overlay2", "Platform": "linux", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "", "ExecIDs": null, "HostConfig": { "Binds": null, "ContainerIDFile": "", "LogConfig": { "Type": "json-file", "Config": {} }, "NetworkMode": "default", "PortBindings": {}, "RestartPolicy": { "Name": "no", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "CgroupnsMode": "host", "Dns": [], "DnsOptions": [], "DnsSearch": [], "ExtraHosts": null, "GroupAdd": null, "IpcMode": "private", "Cgroup": "", "Links": null, "OomScoreAdj": 0, "PidMode": "", "Privileged": false, "PublishAllPorts": false, "ReadonlyRootfs": false, "SecurityOpt": null, "UTSMode": "", "UsernsMode": "", "ShmSize": 67108864, "Runtime": "runc", "ConsoleSize": [ 0, 0 ], "Isolation": "", "CpuShares": 0, "Memory": 0, "NanoCpus": 0, "CgroupParent": "", "BlkioWeight": 0, "BlkioWeightDevice": [], "BlkioDeviceReadBps": null, "BlkioDeviceWriteBps": null, "BlkioDeviceReadIOps": null, "BlkioDeviceWriteIOps": null, "CpuPeriod": 0, "CpuQuota": 0, "CpuRealtimePeriod": 0, "CpuRealtimeRuntime": 0, "CpusetCpus": "", "CpusetMems": "", "Devices": [], "DeviceCgroupRules": null, "DeviceRequests": null, "KernelMemory": 0, "KernelMemoryTCP": 0, "MemoryReservation": 0, "MemorySwap": 0, "MemorySwappiness": null, "OomKillDisable": false, "PidsLimit": null, "Ulimits": null, "CpuCount": 0, "CpuUsage": 0, "IOMaximumIOps": 0, "IOMaximumBandwidth": 0, "MaskedPaths": [ "/proc/asound", "/proc/acpi", "/proc/kcore", "/proc/keys", "/proc/latency_stats", "..." ], "ReadonlyPaths": [ "/proc/bus", "/proc/fs", "/proc/irq", "/proc/sys", "/proc/sysrq-trigger", "..." ] }, "GraphDriver": { "Data": { "LowerDir": "/var/lib/docker/overlay2/fc1234567890abcdef1234567890abcdef/diff", "MergedDir": "/var/lib/docker/overlay2/abc123/merged", "UpperDir": "/var/lib/docker/overlay2/abc123/diff", "WorkDir": "/var/lib/docker/overlay2/abc123/work" }, "Name": "overlay2" }, "Mounts": [], "Config": { "Hostname": "abc123", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ], "Cmd": [ "/bin/bash" ], "Image": "ubuntu:latest", "Volumes": null, "WorkingDir": "/", "Entrypoint": null, "OnBuild": null, "Labels": {} }, "NetworkSettings": { "Bridge": "", "SandboxID": "1234567890abcdef1234567890abcdef", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": {}, "SandboxKey": "/var/run/docker/netns/1234567890ab", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "", "Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "", "IPPrefixLen": 0, "IPv6Gateway": "", "MacAddress": "", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "1234567890abcdef1234567890abcdef", "EndpointID": "", "Gateway": "", "IPAddress": "", "IPPrefixLen": 0, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "", "DriverOpts": null } } }, "SizeRw": 10485760, # 可写层大小（10 MB） "SizeRootFs": 209715200 # 根文件系统总大小（200 MB）} |
总结
通过上述方法，你可以详细了解停止的 Docker 容器占用的内存和其他资源。
