Linux 宿主機切換為docker容器網路
阿新 • • 發佈:2020-12-28
使用 docker inspect 命令檢視docker容器的元資料
[root@chenshifengdeLinuxServer ~]# docker inspect nginx [ { "Id": "658a885b6cf2061571f9ed0501ac3f78a57fa27e7415e867f378e51dba836b71", "Created": "2020-12-10T17:11:28.119940264Z", "Path": "/docker-entrypoint.sh", "Args": [ "nginx", "-g", "daemon off;" ], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 25102, "ExitCode": 0, "Error": "", "StartedAt": "2020-12-10T17:11:28.335837918Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:2562b6bef9769b637d47ec31284ac0f1a7facef498ab97753623b13c502cddce", "ResolvConfPath": "/var/lib/docker/containers/658a885b6cf2061571f9ed0501ac3f78a57fa27e7415e867f378e51dba836b71/resolv.conf", "HostnamePath": "/var/lib/docker/containers/658a885b6cf2061571f9ed0501ac3f78a57fa27e7415e867f378e51dba836b71/hostname", "HostsPath": "/var/lib/docker/containers/658a885b6cf2061571f9ed0501ac3f78a57fa27e7415e867f378e51dba836b71/hosts", "LogPath": "", "Name": "/nginx", "RestartCount": 0, "Driver": "overlay2", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "", "ExecIDs": null, "HostConfig": { "Binds": [ "/root/nginx/html:/usr/share/nginx/html" ], "ContainerIDFile": "", "LogConfig": { "Type": "journald", "Config": {} }, "NetworkMode": "default", "PortBindings": { "80/tcp": [ { "HostIp": "", "HostPort": "80" } ] }, "RestartPolicy": { "Name": "no", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "Dns": [], "DnsOptions": [], "DnsSearch": [], "ExtraHosts": null, "GroupAdd": null, "IpcMode": "", "Cgroup": "", "Links": null, "OomScoreAdj": 0, "PidMode": "", "Privileged": false, "PublishAllPorts": false, "ReadonlyRootfs": false, "SecurityOpt": null, "UTSMode": "", "UsernsMode": "", "ShmSize": 67108864, "Runtime": "docker-runc", "ConsoleSize": [ 0, 0 ], "Isolation": "", "CpuShares": 0, "Memory": 0, "NanoCpus": 0, "CgroupParent": "", "BlkioWeight": 0, "BlkioWeightDevice": null, "BlkioDeviceReadBps": null, "BlkioDeviceWriteBps": null, "BlkioDeviceReadIOps": null, "BlkioDeviceWriteIOps": null, "CpuPeriod": 0, "CpuQuota": 0, "CpuRealtimePeriod": 0, "CpuRealtimeRuntime": 0, "CpusetCpus": "", "CpusetMems": "", "Devices": [], "DiskQuota": 0, "KernelMemory": 0, "MemoryReservation": 0, "MemorySwap": 0, "MemorySwappiness": -1, "OomKillDisable": false, "PidsLimit": 0, "Ulimits": null, "CpuCount": 0, "CpuPercent": 0, "IOMaximumIOps": 0, "IOMaximumBandwidth": 0 }, "GraphDriver": { "Name": "overlay2", "Data": { "LowerDir": "/var/lib/docker/overlay2/a818c938a6f697f3faf90b9f4230247d9d816916d010e221129884ef14aea81f-init/diff:/var/lib/docker/overlay2/04a83ee244f02ebd992152c91ed5685b194a41f23f6175df47e1b3e72d7f9bf7/diff:/var/lib/docker/overlay2/10171c09dcf802d7d43c5b1fd6f60252d367fcdd745ceb2c45da4e104c101681/diff:/var/lib/docker/overlay2/edd89c4a5d470635c2e42301c01c025cf4f8883743ae093bad635d68741f3f69/diff:/var/lib/docker/overlay2/d5ec2c2adb123fcf2d682c1856d147a413d0bafdc6151b46ef74cd015784d8a2/diff:/var/lib/docker/overlay2/c7ad6967e5e5e3bd0b8404ebd3f035c8f74f87c5aa6358e208c255c3cde91ba7/diff", "MergedDir": "/var/lib/docker/overlay2/a818c938a6f697f3faf90b9f4230247d9d816916d010e221129884ef14aea81f/merged", "UpperDir": "/var/lib/docker/overlay2/a818c938a6f697f3faf90b9f4230247d9d816916d010e221129884ef14aea81f/diff", "WorkDir": "/var/lib/docker/overlay2/a818c938a6f697f3faf90b9f4230247d9d816916d010e221129884ef14aea81f/work" } }, "Mounts": [ { "Type": "bind", "Source": "/root/nginx/html", "Destination": "/usr/share/nginx/html", "Mode": "", "RW": true, "Propagation": "rprivate" } ], "Config": { "Hostname": "658a885b6cf2", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "80/tcp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "NGINX_VERSION=1.18.0", "NJS_VERSION=0.4.4", "PKG_RELEASE=2~buster" ], "Cmd": [ "nginx", "-g", "daemon off;" ], "Image": "nginx:1.18.0", "Volumes": null, "WorkingDir": "", "Entrypoint": [ "/docker-entrypoint.sh" ], "OnBuild": null, "Labels": { "maintainer": "NGINX Docker Maintainers <[email protected]>" }, "StopSignal": "SIGQUIT" }, "NetworkSettings": { "Bridge": "", "SandboxID": "8f69de828be9edda6d474c8342d8a343fd2d914507a7765c9b2d563e0ac757f8", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": { "80/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "80" } ] }, "SandboxKey": "/var/run/docker/netns/8f69de828be9", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "cce12c9d43fa3e6829b695808f8c304555638a64f2309c5c8c17d284cf815994", "Gateway": "172.18.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "172.18.0.2", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:ac:12:00:02", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "226951a6fb41ee81a97a905f8a3b9bd6b1dd54a549dd38c2b74db4bb44017770", "EndpointID": "cce12c9d43fa3e6829b695808f8c304555638a64f2309c5c8c17d284cf815994", "Gateway": "172.18.0.1", "IPAddress": "172.18.0.2", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:ac:12:00:02" } } } } ]
獲取PID為 "Pid": 25102,進入/proc/25102/ns目錄下
使用命令nsenter -t 25102 -n 切換為容器網路
[root@chenshifengdeLinuxServer ~]# nsenter -t 25102 -n [root@chenshifengdeLinuxServer ~]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.18.0.2 netmask 255.255.0.0 broadcast 0.0.0.0 inet6 fe80::42:acff:fe12:2 prefixlen 64 scopeid 0x20<link> ether 02:42:ac:12:00:02 txqueuelen 0 (Ethernet) RX packets 34095 bytes 3109711 (2.9 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 25625 bytes 16668777 (15.8 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
使用exit命令退出容器網路
[root@chenshifengdeLinuxServer ~]# exit 登出 [root@chenshifengdeLinuxServer ~]# ifconfig docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.18.0.1 netmask 255.255.0.0 broadcast 0.0.0.0 inet6 fe80::42:baff:fea1:5f8 prefixlen 64 scopeid 0x20<link> ether 02:42:ba:a1:05:f8 txqueuelen 0 (Ethernet) RX packets 32635 bytes 22231242 (21.2 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 41087 bytes 3746534 (3.5 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.213.9 netmask 255.255.240.0 broadcast 172.17.223.255 inet6 fe80::216:3eff:fe12:80fa prefixlen 64 scopeid 0x20<link> ether 00:16:3e:12:80:fa txqueuelen 1000 (Ethernet) RX packets 1557138 bytes 1241609285 (1.1 GiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 901143 bytes 161155319 (153.6 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 75 bytes 6018 (5.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 75 bytes 6018 (5.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 veth693751f: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::9c0c:beff:fe14:ded4 prefixlen 64 scopeid 0x20<link> ether 9e:0c:be:14:de:d4 txqueuelen 0 (Ethernet) RX packets 25625 bytes 16668777 (15.8 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 34095 bytes 3109711 (2.9 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vethba13b4b: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::ac08:d6ff:fe19:21f0 prefixlen 64 scopeid 0x20<link> ether ae:08:d6:19:21:f0 txqueuelen 0 (Ethernet) RX packets 6881 bytes 5984757 (5.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 7629 bytes 659725 (644.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@chenshifengdeLinuxServer ~]#