/Bridge configuration Secret
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Debugging Kubernetes network
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| core@pc-10368 ~ $ ifconfig cbr0 | |
| cbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 | |
| inet 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 | |
| inet6 fe80::d8c5:1fff:fe59:42ff prefixlen 64 scopeid 0x20<link> | |
| ether da:c5:1f:59:42:ff txqueuelen 0 (Ethernet) | |
| RX packets 71 bytes 5132 (5.0 KiB) | |
| RX errors 0 dropped 0 overruns 0 frame 0 | |
| TX packets 326 bytes 17297 (16.8 KiB) | |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
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| # /etc/systemd/system/docker.service | |
| [Unit] | |
| Description=Docker Application Container Engine | |
| Documentation=http://docs.docker.com | |
| After=docker.socket early-docker.target network.target setup-network-environment.service | |
| Requires=docker.socket early-docker.target setup-network-environment.service | |
| [Service] | |
| Environment=TMPDIR=/var/tmp | |
| MountFlags=slave | |
| LimitNOFILE=1048576 | |
| LimitNPROC=1048576 | |
| ExecStart=/usr/lib/coreos/dockerd --daemon --host=fd:// --bridge=cbr0 --iptables=false --ip-masq=false | |
| [Install] | |
| WantedBy=multi-user.target |
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| [ | |
| { | |
| "Id": "0f529141a9eaa03cdf6975f276a5e762192c11e54345138e85fc0a767887e7c2", | |
| "Created": "2015-09-19T13:45:39.919158297Z", | |
| "Path": "/pause", | |
| "Args": [], | |
| "State": { | |
| "Running": true, | |
| "Paused": false, | |
| "Restarting": false, | |
| "OOMKilled": false, | |
| "Dead": false, | |
| "Pid": 7590, | |
| "ExitCode": 0, | |
| "Error": "", | |
| "StartedAt": "2015-09-19T13:45:39.994509711Z", | |
| "FinishedAt": "0001-01-01T00:00:00Z" | |
| }, | |
| "Image": "2c40b0526b6358710fd09e7b8c022429268cc61703b4777e528ac9d469a07ca1", | |
| "NetworkSettings": { | |
| "Bridge": "cbr0", | |
| "EndpointID": "2e821b000c923e52acac71c6c9bde2f9b9fef494be1acc2388824550065227af", | |
| "Gateway": "192.168.1.1", | |
| "GlobalIPv6Address": "", | |
| "GlobalIPv6PrefixLen": 0, | |
| "HairpinMode": false, | |
| "IPAddress": "192.168.1.9", | |
| "IPPrefixLen": 24, | |
| "IPv6Gateway": "", | |
| "LinkLocalIPv6Address": "", | |
| "LinkLocalIPv6PrefixLen": 0, | |
| "MacAddress": "02:42:c0:a8:01:09", | |
| "NetworkID": "d2a943b06502cde2dc63542eb5762b7b3f1e85cf4a8fbac6c155d768eab67883", | |
| "PortMapping": null, | |
| "Ports": {}, | |
| "SandboxKey": "/var/run/docker/netns/0f529141a9ea", | |
| "SecondaryIPAddresses": null, | |
| "SecondaryIPv6Addresses": null | |
| }, | |
| "ResolvConfPath": "/var/lib/docker/containers/0f529141a9eaa03cdf6975f276a5e762192c11e54345138e85fc0a767887e7c2/resolv.conf", | |
| "HostnamePath": "/var/lib/docker/containers/0f529141a9eaa03cdf6975f276a5e762192c11e54345138e85fc0a767887e7c2/hostname", | |
| "HostsPath": "/var/lib/docker/containers/0f529141a9eaa03cdf6975f276a5e762192c11e54345138e85fc0a767887e7c2/hosts", | |
| "LogPath": "/var/lib/docker/containers/0f529141a9eaa03cdf6975f276a5e762192c11e54345138e85fc0a767887e7c2/0f529141a9eaa03cdf6975f276a5 | |
| e762192c11e54345138e85fc0a767887e7c2-json.log", | |
| "Name": "/k8s_POD.3ef3f8d9_test-v2-mrq5i_default_b6e1261c-5ed4-11e5-9986-f0def1460b1c_92661fed", | |
| "RestartCount": 0, | |
| "Driver": "overlay", | |
| "ExecDriver": "native-0.2", | |
| "MountLabel": "", | |
| "ProcessLabel": "", | |
| "Volumes": {}, | |
| "VolumesRW": {}, | |
| "AppArmorProfile": "", | |
| "ExecIDs": null, | |
| "HostConfig": { | |
| "Binds": null, | |
| "ContainerIDFile": "", | |
| "LxcConf": null, | |
| "Memory": 0, | |
| "MemorySwap": -1, | |
| "CpuShares": 2, | |
| "CpuPeriod": 0, | |
| "CpusetCpus": "", | |
| "CpusetMems": "", | |
| "CpuQuota": 0, | |
| "BlkioWeight": 0, | |
| "OomKillDisable": false, | |
| "Privileged": false, | |
| "PortBindings": null, | |
| "Links": null, | |
| "PublishAllPorts": false, | |
| "Dns": [ | |
| "129.132.98.12" | |
| ], | |
| "DnsSearch": [ | |
| "ethz.ch" | |
| ], | |
| "ExtraHosts": null, | |
| "VolumesFrom": null, | |
| "Devices": null, | |
| "NetworkMode": "bridge", | |
| "IpcMode": "", | |
| "PidMode": "", | |
| "UTSMode": "", | |
| "CapAdd": null, | |
| "CapDrop": null, | |
| "RestartPolicy": { | |
| "Name": "", | |
| "MaximumRetryCount": 0 | |
| }, | |
| "SecurityOpt": null, | |
| "ReadonlyRootfs": false, | |
| "Ulimits": null, | |
| "LogConfig": { | |
| "Type": "json-file", | |
| "Config": {} | |
| }, | |
| "CgroupParent": "" | |
| }, | |
| "Config": { | |
| "Hostname": "test-v2-mrq5i", | |
| "Domainname": "", | |
| "User": "", | |
| "AttachStdin": false, | |
| "AttachStdout": false, | |
| "AttachStderr": false, | |
| "PortSpecs": null, | |
| "ExposedPorts": null, | |
| "Tty": false, | |
| "OpenStdin": false, | |
| "StdinOnce": false, | |
| "Env": [ | |
| "KUBERNETES_PORT_443_TCP_ADDR=10.100.0.1", | |
| "KUBERNETES_SERVICE_HOST=10.100.0.1", | |
| "KUBERNETES_SERVICE_PORT=443", | |
| "KUBERNETES_PORT=tcp://10.100.0.1:443", | |
| "KUBERNETES_PORT_443_TCP=tcp://10.100.0.1:443", | |
| "KUBERNETES_PORT_443_TCP_PROTO=tcp", | |
| "KUBERNETES_PORT_443_TCP_PORT=443", | |
| "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" | |
| ], | |
| "Cmd": null, | |
| "Image": "gcr.io/google_containers/pause:0.8.0", | |
| "Volumes": null, | |
| "VolumeDriver": "", | |
| "WorkingDir": "", | |
| "Entrypoint": [ | |
| "/pause" | |
| ], | |
| "NetworkDisabled": false, | |
| "MacAddress": "", | |
| "OnBuild": null, | |
| "Labels": { | |
| "io.kubernetes.pod.name": "default/test-v2-mrq5i", | |
| "io.kubernetes.pod.terminationGracePeriod": "30" | |
| } | |
| } | |
| } | |
| ] |
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| core@pc-10368 ~ $ docker exec -ti 3b6 /bin/bash | |
| root@test-0ocfk:/# ping -c 1 192.168.1.1 | |
| PING 192.168.1.1 (192.168.1.1): 56 data bytes | |
| ping: sending packet: Network is unreachable | |
| root@test-0ocfk:/# ping -c 1 192.168.1.6 | |
| PING 192.168.1.6 (192.168.1.6): 56 data bytes | |
| ping: sending packet: Network is unreachable | |
| root@test-0ocfk:/# ping -c 1 www.google.com | |
| ping: unknown host | |
| root@test-0ocfk:/# ifconfig | |
| bash: ifconfig: command not found | |
| root@test-0ocfk:/# exit | |
| core@pc-10368 ~ $ |
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| core@pc-10368 ~ $ docker run -ti ubuntu | |
| root@5159bdfd3d36:/# ping -c 1 192.168.1.1 | |
| PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. | |
| 64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.053 ms | |
| --- 192.168.1.1 ping statistics --- | |
| 1 packets transmitted, 1 received, 0% packet loss, time 0ms | |
| rtt min/avg/max/mdev = 0.053/0.053/0.053/0.000 ms | |
| root@5159bdfd3d36:/# ifconfig | |
| eth0 Link encap:Ethernet HWaddr 02:42:c0:a8:01:08 | |
| inet addr:192.168.1.8 Bcast:0.0.0.0 Mask:255.255.255.0 | |
| inet6 addr: fe80::42:c0ff:fea8:108/64 Scope:Link | |
| UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 | |
| RX packets:27 errors:0 dropped:0 overruns:0 frame:0 | |
| TX packets:11 errors:0 dropped:0 overruns:0 carrier:0 | |
| collisions:0 txqueuelen:0 | |
| RX bytes:2300 (2.3 KB) TX bytes:898 (898.0 B) | |
| lo Link encap:Local Loopback | |
| inet addr:127.0.0.1 Mask:255.0.0.0 | |
| inet6 addr: ::1/128 Scope:Host | |
| UP LOOPBACK RUNNING MTU:65536 Metric:1 | |
| RX packets:0 errors:0 dropped:0 overruns:0 frame:0 | |
| TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 | |
| collisions:0 txqueuelen:0 | |
| RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) | |
| root@5159bdfd3d36:/# ping -c 1 www.google.com | |
| PING www.google.com (173.194.40.82) 56(84) bytes of data. | |
| 64 bytes from zrh04s06-in-f18.1e100.net (173.194.40.82): icmp_seq=1 ttl=52 time=1.09 ms | |
| --- www.google.com ping statistics --- | |
| 1 packets transmitted, 1 received, 0% packet loss, time 0ms | |
| rtt min/avg/max/mdev = 1.098/1.098/1.098/0.000 ms | |
| root@5159bdfd3d36:/# |
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