Docker跨宿主机容器通信-通过网络跨宿主机互联
作者：尹正杰
版权声明：原创作品，谢绝转载！否则将追究法律责任。
一.docker网络类型
Docker的网络有四种类型,分别为host模式,none模式,container模式,bridge模式。
host模式:
创建容器时,可以使用"-net=host"指定。
启动的容器如果指定了网络类型为host模式，那么新创建的容器不会创建自己的虚拟网卡,而是直接使用宿主机的网卡和IP地址,因此容器里面查看到的IP信息就是宿主机的信息，访问容器的时候直接使用"宿主机IP:容器端口"即可,不过容器的其它资源们比如文件系统，系统进程等还是和宿主机保持隔离。
此模式的网络性能最高,但是各容器之间端口不能相同(因为该模式直接使用的是宿主机的网络)，适用于运行容器端口比较固定的业务，比如Mysql,Redis等。
none模式:
创建容器时，可以使用"-net=none"指定。
在使用none模式后,docker容器不会进行任何网络配置，其没有网卡，没有IP也没有路由，因此默认无法与外界通信，需要手动添加配置IP等，所以极少使用。
container模式:
创建容器时,可以使用"-net=container:容器名称或容器ID"指定。
使用此模式创建的容器需指定和一个已经存在的容器共享一个网络,而不是和宿主机共享网络，换句话说，就是两个容器公用同一个IP地址。
新创建的容器不会创建自己的网卡也不会配置自己的IP,而是和一个已经存在的被指定的容器IP和端口范围,因此这个容器的端口不能和被指定的端口冲突,除了网络之外的文件系统，进程信息等仍然保持相互隔离，两个容器的进程可以通过lo网卡设备通信。
bridge模式:
docker的默认模式即不指定任何模式就是bridge模式，也是使用比较多的模式，此模式创建的容器会为每一个容器分配自己的网络IP等信息，并将容器连接到一个虚拟网桥与外界通信。
博主推荐阅读:
https://www.cnblogs.com/yinzhengjie/p/11517865.html
1>.不指定容器的网络模式默认就是bridge模式
[root@docker101.yinzhengjie.org.cn ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff inet 172.200.3.101/21 brd 172.200.7.255 scope global bond0 valid_lft forever preferred_lft forever 7: bond1: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff inet 192.200.3.101/21 brd 192.200.7.255 scope global bond1 valid_lft forever preferred_lft forever 8: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:81:7d:84:58 brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container run -it --name nginx-web01-net-bridge -d nginx:v0.1-20200201 0b55d9badcb01e113b19fa4b3b1fa399d1705ce467d19dc87d1a3ce9b76d814a [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0b55d9badcb0 nginx:v0.1-20200201 "nginx" 3 seconds ago Up 3 seconds 80/tcp, 443/tcp nginx-web01-net-bridge [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff inet 172.200.3.101/21 brd 172.200.7.255 scope global bond0 valid_lft forever preferred_lft forever 7: bond1: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff inet 192.200.3.101/21 brd 192.200.7.255 scope global bond1 valid_lft forever preferred_lft forever 8: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:81:7d:84:58 brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever 34: veth72e6ea8@if33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default link/ether 82:5a:ca:c9:1f:59 brd ff:ff:ff:ff:ff:ff link-netnsid 0 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff inet 172.200.3.101/21 brd 172.200.7.255 scope global bond0 valid_lft forever preferred_lft forever 7: bond1: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff inet 192.200.3.101/21 brd 192.200.7.255 scope global bond1 valid_lft forever preferred_lft forever 8: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:81:7d:84:58 brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever 34: veth72e6ea8@if33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default link/ether 82:5a:ca:c9:1f:59 brd ff:ff:ff:ff:ff:ff link-netnsid 0 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0b55d9badcb0 nginx:v0.1-20200201 "nginx" 3 seconds ago Up 3 seconds 80/tcp, 443/tcp nginx-web01-net-bridge [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container rm -fv `docker container ps -a -q` 0b55d9badcb0 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff 5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond1 state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff 6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:9a brd ff:ff:ff:ff:ff:ff inet 172.200.3.101/21 brd 172.200.7.255 scope global bond0 valid_lft forever preferred_lft forever 7: bond1: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:0c:29:fa:bd:a4 brd ff:ff:ff:ff:ff:ff inet 192.200.3.101/21 brd 192.200.7.255 scope global bond1 valid_lft forever preferred_lft forever 8: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:81:7d:84:58 brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft fore
2>.创建容器时显式指定网络模式为host
[root@docker102.yinzhengjie.org.cn ~]# docker container rm -fv `docker container ps -a -q` #为了试验方便，我们将其它容器删除掉 11bc2df8a985 9c4086710d57 [root@docker102.yinzhengjie.org.cn ~]#
[root@docker102.yinzhengjie.org.cn ~]# ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 *:22 *:* LISTEN 0 128 :::22 :::* [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container run -it --name redis-net-host1 --net=host -d redis:latest f53da097d378134762858c8663bd7263df91e63a01f26e5585f45348e93f3ef6 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 511 *:6379 *:* LISTEN 0 128 *:22 *:* LISTEN 0 511 :::6379 :::* LISTEN 0 128 :::22 :::* [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES f53da097d378 redis:latest "docker-entrypoint.s…" 16 seconds ago Up 15 seconds redis-net-host1 [root@docker102.yinzhengjie.org.cn ~]#
[root@docker102.yinzhengjie.org.cn ~]# ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 511 *:6379 *:* LISTEN 0 128 *:22 *:* LISTEN 0 511 :::6379 :::* LISTEN 0 128 :::22 :::* [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES f53da097d378 redis:latest "docker-entrypoint.s…" 16 seconds ago Up 15 seconds redis-net-host1 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container run -it --name redis-net-host2 --net=host -d redis:latest 78b42aaa9b8520680d243de85f8efc2d8c4a85ec0947a952223958d2c6886aab [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 78b42aaa9b85 redis:latest "docker-entrypoint.s…" 3 seconds ago Exited (1) 3 seconds ago redis-net-host2 f53da097d378 redis:latest "docker-entrypoint.s…" About a minute ago Up About a minute redis-net-host1 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 511 *:6379 *:* LISTEN 0 128 *:22 *:* LISTEN 0 511 :::6379 :::* LISTEN 0 128 :::22 :::* [root@docker102.yinzhengjie.org.cn ~]#
[root@docker102.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 78b42aaa9b85 redis:latest "docker-entrypoint.s…" 3 seconds ago Exited (1) 3 seconds ago redis-net-host2 f53da097d378 redis:latest "docker-entrypoint.s…" About a minute ago Up About a minute redis-net-host1 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 511 *:6379 *:* LISTEN 0 128 *:22 *:* LISTEN 0 511 :::6379 :::* LISTEN 0 128 :::22 :::* [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container logs redis-net-host2 1:C 01 Feb 2020 10:29:26.160 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 1:C 01 Feb 2020 10:29:26.160 # Redis version=5.0.7, bits=64, commit=00000000, modified=0, pid=1, just started 1:C 01 Feb 2020 10:29:26.160 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf 1:M 01 Feb 2020 10:29:26.160 # Could not create server TCP listening socket *:6379: bind: Address already in use [root@docker102.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# yum -y install epel-release Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.tuna.tsinghua.edu.cn * updates: mirror.bit.edu.cn Resolving Dependencies --> Running transaction check ---> Package epel-release.noarch 0:7-11 will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================================================================================================== Package Arch Version Repository Size ============================================================================================================================================================================================================================================================================== Installing: epel-release noarch 7-11 extras 15 k Transaction Summary ============================================================================================================================================================================================================================================================================== Install 1 Package Total download size: 15 k Installed size: 24 k Downloading packages: epel-release-7-11.noarch.rpm | 15 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : epel-release-7-11.noarch 1/1 Verifying : epel-release-7-11.noarch 1/1 Installed: epel-release.noarch 0:7-11 Complete! [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# yum -y install redis Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile epel/x86_64/metalink | 8.7 kB 00:00:00 * base: mirrors.tuna.tsinghua.edu.cn * epel: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.tuna.tsinghua.edu.cn * updates: mirror.bit.edu.cn epel | 5.4 kB 00:00:00 (1/3): epel/x86_64/group_gz | 90 kB 00:00:00 (2/3): epel/x86_64/updateinfo | 1.0 MB 00:00:00 (3/3): epel/x86_64/primary_db | 6.9 MB 00:00:11 Resolving Dependencies --> Running transaction check ---> Package redis.x86_64 0:3.2.12-2.el7 will be installed --> Processing Dependency: libjemalloc.so.1()(64bit) for package: redis-3.2.12-2.el7.x86_64 --> Running transaction check ---> Package jemalloc.x86_64 0:3.6.0-1.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================================================================================================== Package Arch Version Repository Size ============================================================================================================================================================================================================================================================================== Installing: redis x86_64 3.2.12-2.el7 epel 544 k Installing for dependencies: jemalloc x86_64 3.6.0-1.el7 epel 105 k Transaction Summary ============================================================================================================================================================================================================================================================================== Install 1 Package (+1 Dependent package) Total download size: 648 k Installed size: 1.7 M Downloading packages: warning: /var/cache/yum/x86_64/7/epel/packages/jemalloc-3.6.0-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY ] 0.0 B/s | 0 B --:--:-- ETA Public key for jemalloc-3.6.0-1.el7.x86_64.rpm is not installed (1/2): jemalloc-3.6.0-1.el7.x86_64.rpm | 105 kB 00:00:00 (2/2): redis-3.2.12-2.el7.x86_64.rpm | 544 kB 00:00:00 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Total 936 kB/s | 648 kB 00:00:00 Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 Importing GPG key 0x352C64E5: Userid : "Fedora EPEL (7) <epel@fedoraproject.org>" Fingerprint: 91e9 7d7c 4a5e 96f1 7f3e 888f 6a2f aea2 352c 64e5 Package : epel-release-7-11.noarch (@extras) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : jemalloc-3.6.0-1.el7.x86_64 1/2 Installing : redis-3.2.12-2.el7.x86_64 2/2 Verifying : redis-3.2.12-2.el7.x86_64 1/2 Verifying : jemalloc-3.6.0-1.el7.x86_64 2/2 Installed: redis.x86_64 0:3.2.12-2.el7 Dependency Installed: jemalloc.x86_64 0:3.6.0-1.el7 Complete! [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# redis-cli -h docker102.yinzhengjie.org.cn docker102.yinzhengjie.org.cn:6379> info # Server redis_version:5.0.7 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:b671f408463590b9 redis_mode:standalone os:Linux 3.10.0-957.el7.x86_64 x86_64 arch_bits:64 multiplexing_api:epoll atomicvar_api:atomic-builtin gcc_version:8.3.0 process_id:1 run_id:77cfc6e3c18987d1752a9dfcb48cecd537a979b0 tcp_port:6379 uptime_in_seconds:1170 uptime_in_days:0 hz:10 configured_hz:10 lru_clock:3495764 executable:/data/redis-server config_file: # Clients connected_clients:1 client_recent_max_input_buffer:2 client_recent_max_output_buffer:0 blocked_clients:0 # Memory used_memory:854160 used_memory_human:834.14K used_memory_rss:11182080 used_memory_rss_human:10.66M used_memory_peak:854160 used_memory_peak_human:834.14K used_memory_peak_perc:100.12% used_memory_overhead:841982 used_memory_startup:792288 used_memory_dataset:12178 used_memory_dataset_perc:19.68% allocator_allocated:1355032 allocator_active:1609728 allocator_resident:8474624 total_system_memory:4123009024 total_system_memory_human:3.84G used_memory_lua:37888 used_memory_lua_human:37.00K used_memory_scripts:0 used_memory_scripts_human:0B number_of_cached_scripts:0 maxmemory:0 maxmemory_human:0B maxmemory_policy:noeviction allocator_frag_ratio:1.19 allocator_frag_bytes:254696 allocator_rss_ratio:5.26 allocator_rss_bytes:6864896 rss_overhead_ratio:1.32 rss_overhead_bytes:2707456 mem_fragmentation_ratio:13.77 mem_fragmentation_bytes:10369920 mem_not_counted_for_evict:0 mem_replication_backlog:0 mem_clients_slaves:0 mem_clients_normal:49694 mem_aof_buffer:0 mem_allocator:jemalloc-5.1.0 active_defrag_running:0 lazyfree_pending_objects:0 # Persistence loading:0 rdb_changes_since_last_save:0 rdb_bgsave_in_progress:0 rdb_last_save_time:1580552898 rdb_last_bgsave_status:ok rdb_last_bgsave_time_sec:-1 rdb_current_bgsave_time_sec:-1 rdb_last_cow_size:0 aof_enabled:0 aof_rewrite_in_progress:0 aof_rewrite_scheduled:0 aof_last_rewrite_time_sec:-1 aof_current_rewrite_time_sec:-1 aof_last_bgrewrite_status:ok aof_last_write_status:ok aof_last_cow_size:0 # Stats total_connections_received:1 total_commands_processed:1 instantaneous_ops_per_sec:0 total_net_input_bytes:31 total_net_output_bytes:11468 instantaneous_input_kbps:0.00 instantaneous_output_kbps:0.00 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 expired_stale_perc:0.00 expired_time_cap_reached_count:0 evicted_keys:0 keyspace_hits:0 keyspace_misses:0 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:0 migrate_cached_sockets:0 slave_expires_tracked_keys:0 active_defrag_hits:0 active_defrag_misses:0 active_defrag_key_hits:0 active_defrag_key_misses:0 # Replication role:master connected_slaves:0 master_replid:9d2adf0cdd5cad67d6173cf06ca8bed2b9dc4237 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:0 second_repl_offset:-1 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 # CPU used_cpu_sys:0.748182 used_cpu_user:0.957966 used_cpu_sys_children:0.001870 used_cpu_user_children:0.000882 # Cluster cluster_enabled:0 # Keyspace docker102.yinzhengjie.org.cn:6379> docker102.yinzhengjie.org.cn:6379> quit [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
3>.创建容器时显式指定网络模式为none(使用场景相对较少)
[root@docker101.yinzhengjie.org.cn ~]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE nginx v0.1-20200201 1a8b4f68e96a 3 hours ago 449MB centos-haproxy v1.8.20 1858fe05d96f 8 days ago 606MB registry latest 708bc6af7e5e 8 days ago 25.8MB tomcat-app01 v0.1 bf45c22f2d5b 9 days ago 983MB tomcat-base 8.5.50 9ff79f369094 10 days ago 968MB jdk-base 1.8.0_231 0f63a97ddc85 10 days ago 953MB centos-base 7.6.1810 b4931fd9ace2 10 days ago 551MB centos centos7.6.1810 f1cb7c7d58b7 10 months ago 202MB lorel/docker-stress-ng latest 1ae56ccafe55 3 years ago 8.1MB [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container run --name nginx-net-none --net=none -v /yinzhengjie:/yinzhengjie -d nginx:v0.1-20200201 3efb710ed1868dd514758bee0b2864957f914741f445ba47102845897535fe3c [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3efb710ed186 nginx:v0.1-20200201 "nginx" 3 seconds ago Up 3 seconds nginx-net-none [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it nginx-net-none bash [root@3efb710ed186 /]# [root@3efb710ed186 /]# ifconfig -a lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 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 [root@3efb710ed186 /]# [root@3efb710ed186 /]# ll /yinzhengjie/ total 0 drwxr-xr-x 4 root root 34 Jan 29 16:48 data drwxr-xr-x 3 root root 24 Jan 21 23:27 softwares [root@3efb710ed186 /]# [root@3efb710ed186 /]# exit exit [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# ll /yinzhengjie/ total 0 drwxr-xr-x 4 root root 34 Jan 30 00:48 data drwxr-xr-x 3 root root 24 Jan 22 07:27 softwares [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
4>.创建容器时显式指定网络模式为一个已经存在的容器的网络空间(即两个容器共用同一块网卡设备)
[root@docker101.yinzhengjie.org.cn ~]# docker container rm -fv `docker container ps -a -q` 90ddc49aa5e8 972600e88309 [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container run -it --name nginx-net-bridge --net=bridge -v /yinzhengjie:/yinzhengjie -d tomcat-base:8.5.50 232919619cc7eaf19bc6ed064087ca0d6933816c345a2b47c1f8ebcc0aa88814 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 232919619cc7 tomcat-base:8.5.50 "/bin/bash" 3 seconds ago Up 2 seconds nginx-net-bridge [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it nginx-net-bridge bash [root@232919619cc7 /]# [root@232919619cc7 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet) 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 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 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 [root@232919619cc7 /]# [root@232919619cc7 /]# ll /yinzhengjie/ total 0 drwxr-xr-x 4 root root 34 Jan 30 00:48 data drwxr-xr-x 3 root root 24 Jan 22 07:27 softwares [root@232919619cc7 /]# [root@232919619cc7 /]# exit exit [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# docker container run -it --name nginx-net-bridge2 --net=container:nginx-net-bridge -d nginx:v0.1-20200201 d0d41584cd60a5990c59380d0013db80f6fea202e449035646ee3c65906c8a05 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES d0d41584cd60 nginx:v0.1-20200201 "nginx" 3 seconds ago Up 2 seconds nginx-net-bridge2 232919619cc7 tomcat-base:8.5.50 "/bin/bash" 31 seconds ago Up 30 seconds nginx-net-bridge [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it nginx-net-bridge2 bash [root@232919619cc7 /]# [root@232919619cc7 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet) 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 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 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 [root@232919619cc7 /]# [root@232919619cc7 /]# ll /yinzhengjie ls: cannot access /yinzhengjie: No such file or directory [root@232919619cc7 /]# [root@232919619cc7 /]# exit exit [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
5>.查看宿主机默认网络模式的信息概要
[root@docker101.yinzhengjie.org.cn ~]# docker network ls NETWORK ID NAME DRIVER SCOPE 34054a7dc2e6 bridge bridge local e537f0ed209d host host local 408c4e463c01 none null local [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# docker network inspect bridge [ { "Name": "bridge", "Id": "34054a7dc2e6fd90f7b3038a93130db1e629398659ea84ed9b1dd2d566ba212e", "Created": "2020-02-01T15:21:36.488094467+08:00", "Scope": "local", "Driver": "bridge", "EnableIPv6": false, "IPAM": { "Driver": "default", "Options": null, "Config": [ { "Subnet": "172.17.0.0/16", "Gateway": "172.17.0.1" } ] }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": { "Network": "" }, "ConfigOnly": false, "Containers": { "232919619cc7eaf19bc6ed064087ca0d6933816c345a2b47c1f8ebcc0aa88814": { "Name": "nginx-net-bridge", "EndpointID": "f12d868d0dc6b4277bccb19dd1c44a33690d9f738eea6bc3d5dcf482c8ebf3da", "MacAddress": "02:42:ac:11:00:02", "IPv4Address": "172.17.0.2/16", "IPv6Address": "" } }, "Options": { "com.docker.network.bridge.default_bridge": "true", "com.docker.network.bridge.enable_icc": "true", "com.docker.network.bridge.enable_ip_masquerade": "true", "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0", "com.docker.network.bridge.name": "docker0", "com.docker.network.driver.mtu": "1500" }, "Labels": {} } ] [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# docker network inspect host [ { "Name": "host", "Id": "e537f0ed209d7594743c7d35a221bd09bbb6999f35fee80b44f3fa8188e0ffda", "Created": "2020-01-21T16:25:36.207042152+08:00", "Scope": "local", "Driver": "host", "EnableIPv6": false, "IPAM": { "Driver": "default", "Options": null, "Config": [] }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": { "Network": "" }, "ConfigOnly": false, "Containers": {}, "Options": {}, "Labels": {} } ] [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# docker network inspect none [ { "Name": "none", "Id": "408c4e463c01f8662a1f82ffde60b2a97b2aaf317779ce661197a1b10362da00", "Created": "2020-01-21T16:25:36.199531528+08:00", "Scope": "local", "Driver": "null", "EnableIPv6": false, "IPAM": { "Driver": "default", "Options": null, "Config": [] }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": { "Network": "" }, "ConfigOnly": false, "Containers": {}, "Options": {}, "Labels": {} } ] [root@docker101.yinzhengjie.org.cn ~]#
二.docker跨主机互联简单实现
跨主机互联是说A宿主机的容器可以访问B宿主机上的容器,但是前提是保证各宿主机之间的网络是可以相互通信的，然后各容器才可以通过各自的宿主机访问到对方的容器。
实现原理是在各宿主机上做相应的网络路由就可以实现A宿主机和容器访问B主机的目的，复杂的网络或者大型的网络可以通过Google开源的K8S进行互联。
Docker的默认网段都是172.17.0.0/24，而且每个宿主机都是一样的,因此要做路由的前提就是个主机网络不能一致。为了避免对实验的影响，建议大家选两个"干净"的docker环境节点，或者删除之前在试验节点创建的所有容器，在个节点上执行"docker container rm -f `docker container ps -a -q`"
1>.修改docker101.yinzhengjie.org.cn节点的默认网段
[root@docker101.yinzhengjie.org.cn ~]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:81:7d:84:58 txqueuelen 0 (Ethernet) RX packets 13994 bytes 609179 (594.9 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 16608 bytes 78555306 (74.9 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# grep ExecStart /lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# vim /lib/systemd/system/docker.service [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# grep ExecStart /lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --bip=10.100.0.254/16 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# systemctl daemon-reload [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# systemctl restart docker.service [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 10.100.0.254 netmask 255.255.0.0 broadcast 10.100.255.255 ether 02:42:81:7d:84:58 txqueuelen 0 (Ethernet) RX packets 13994 bytes 609179 (594.9 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 16608 bytes 78555306 (74.9 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@docker101.yinzhengjie.org.cn ~]#
2>.修改docker102.yinzhengjie.org.cn节点的默认网段
[root@docker102.yinzhengjie.org.cn ~]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:6b:e0:f6:2e txqueuelen 0 (Ethernet) 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 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# grep ExecStart /lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --insecure-registry docker103.yinzhengjie.org.cn --insecure-registry docker104.yinzhengjie.org.cn [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# vim /lib/systemd/system/docker.service [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# grep ExecStart /lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --insecure-registry docker103.yinzhengjie.org.cn --insecure-registry docker104.yinzhengjie.org.cn --bip=10.200.0.254/16 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# systemctl daemon-reload [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# systemctl restart docker.service [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 10.200.0.254 netmask 255.255.0.0 broadcast 10.200.255.255 ether 02:42:6b:e0:f6:2e txqueuelen 0 (Ethernet) 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 [root@docker102.yinzhengjie.org.cn ~]#
3>.docker101.yinzhengjie.org.cn节点上运行一个容器并查看网关信息
[root@docker101.yinzhengjie.org.cn ~]# docker image pull centos:centos7.6.1810 centos7.6.1810: Pulling from library/centos ac9208207ada: Pull complete Digest: sha256:62d9e1c2daa91166139b51577fe4f4f6b4cc41a3a2c7fc36bd895e2a17a3e4e6 Status: Downloaded newer image for centos:centos7.6.1810 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container run -it --name centos01 -d centos:centos7.6.1810 6f147e263a544757b0c443ca7f801edb2de968c808a30d612adbfe09260ea2bf [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it 6f147e263a544757b0c443ca7f801edb2de968c808a30d612adbfe09260ea2bf bash [root@6f147e263a54 /]# [root@6f147e263a54 /]# yum -y install net-tools [root@6f147e263a54 /]# [root@6f147e263a54 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.100.0.1 netmask 255.255.0.0 broadcast 10.100.255.255 ether 02:42:0a:64:00:01 txqueuelen 0 (Ethernet) RX packets 2779 bytes 13327375 (12.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2545 bytes 140646 (137.3 KiB) 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 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 [root@6f147e263a54 /]# [root@6f147e263a54 /]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.100.0.254 0.0.0.0 UG 0 0 0 eth0 10.100.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 [root@6f147e263a54 /]# [root@6f147e263a54 /]# exit exit [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]#
4>.docker102.yinzhengjie.org.cn节点上运行一个容器并查看网关信息
[root@docker102.yinzhengjie.org.cn ~]# docker image pull centos:centos7.6.1810 centos7.6.1810: Pulling from library/centos ac9208207ada: Pull complete Digest: sha256:62d9e1c2daa91166139b51577fe4f4f6b4cc41a3a2c7fc36bd895e2a17a3e4e6 Status: Downloaded newer image for centos:centos7.6.1810 docker.io/library/centos:centos7.6.1810 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container run -it --name centos02 -d centos:centos7.6.1810 f7329ef9419289c4d9599c557f04518f383ced60c01e3a3749d6a18ef32244bb [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# docker container exec -it f7329ef9419289c4d9599c557f04518f383ced60c01e3a3749d6a18ef32244bb bash [root@f7329ef94192 /]# [root@f7329ef94192 /]# yum -y install net-tools [root@f7329ef94192 /]# [root@f7329ef94192 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.200.0.1 netmask 255.255.0.0 broadcast 10.200.255.255 ether 02:42:0a:c8:00:01 txqueuelen 0 (Ethernet) RX packets 2429 bytes 13308486 (12.6 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2345 bytes 129858 (126.8 KiB) 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 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 [root@f7329ef94192 /]# [root@f7329ef94192 /]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.200.0.254 0.0.0.0 UG 0 0 0 eth0 10.200.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 [root@f7329ef94192 /]# [root@f7329ef94192 /]# exit exit [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]#
5>.docker101.yinzhengjie.org.cn节点上添加静态路径
[root@docker101.yinzhengjie.org.cn ~]# iptables -vnL Chain INPUT (policy ACCEPT 61 packets, 5225 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED 0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0 Chain OUTPUT (policy ACCEPT 42 packets, 6673 bytes) pkts bytes target prot opt in out source destination Chain DOCKER (1 references) pkts bytes target prot opt in out source destination Chain DOCKER-ISOLATION-STAGE-1 (1 references) pkts bytes target prot opt in out source destination 0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-ISOLATION-STAGE-2 (1 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-USER (1 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# iptables -A FORWARD -s 172.200.0.0/21 -j ACCEPT [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# iptables -vnL Chain INPUT (policy ACCEPT 17 packets, 1132 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED 0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * * 172.200.0.0/21 0.0.0.0/0 Chain OUTPUT (policy ACCEPT 11 packets, 1308 bytes) pkts bytes target prot opt in out source destination Chain DOCKER (1 references) pkts bytes target prot opt in out source destination Chain DOCKER-ISOLATION-STAGE-1 (1 references) pkts bytes target prot opt in out source destination 0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-ISOLATION-STAGE-2 (1 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-USER (1 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 [root@docker101.yinzhengjie.org.cn ~]#
[root@docker101.yinzhengjie.org.cn ~]# hostname -i 172.200.3.101 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.200.7.254 0.0.0.0 UG 0 0 0 bond0 10.100.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 1007 0 0 bond1 172.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond0 192.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond1 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# route add -net 10.200.0.0/16 gw 172.200.3.102 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.200.7.254 0.0.0.0 UG 0 0 0 bond0 10.100.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 10.200.0.0 172.200.3.102 255.255.0.0 UG 0 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 1007 0 0 bond1 172.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond0 192.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond1 [root@docker101.yinzhengjie.org.cn ~]#
6>.docker102.yinzhengjie.org.cn节点上添加静态路径
[root@docker102.yinzhengjie.org.cn ~]# iptables -vnL Chain INPUT (policy ACCEPT 60 packets, 5185 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED 0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0 Chain OUTPUT (policy ACCEPT 42 packets, 6481 bytes) pkts bytes target prot opt in out source destination Chain DOCKER (1 references) pkts bytes target prot opt in out source destination Chain DOCKER-ISOLATION-STAGE-1 (1 references) pkts bytes target prot opt in out source destination 0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-ISOLATION-STAGE-2 (1 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-USER (1 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# iptables -A FORWARD -s 172.200.0.0/21 -j ACCEPT [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# iptables -vnL Chain INPUT (policy ACCEPT 8 packets, 528 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED 0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * * 172.200.0.0/21 0.0.0.0/0 Chain OUTPUT (policy ACCEPT 5 packets, 716 bytes) pkts bytes target prot opt in out source destination Chain DOCKER (1 references) pkts bytes target prot opt in out source destination Chain DOCKER-ISOLATION-STAGE-1 (1 references) pkts bytes target prot opt in out source destination 0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-ISOLATION-STAGE-2 (1 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 Chain DOCKER-USER (1 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 [root@docker102.yinzhengjie.org.cn ~]#
[root@docker102.yinzhengjie.org.cn ~]# hostname -i 172.200.3.102 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.200.7.254 0.0.0.0 UG 0 0 0 bond0 10.200.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 1007 0 0 bond1 172.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond0 192.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond1 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# route add -net 10.100.0.0/16 gw 172.200.3.101 [root@docker102.yinzhengjie.org.cn ~]# [root@docker102.yinzhengjie.org.cn ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.200.7.254 0.0.0.0 UG 0 0 0 bond0 10.100.0.0 172.200.3.101 255.255.0.0 UG 0 0 0 bond0 10.200.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 1007 0 0 bond1 172.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond0 192.200.0.0 0.0.0.0 255.255.248.0 U 0 0 0 bond1 [root@docker102.yinzhengjie.org.cn ~]#
7>.两个节点相互ping测试
[root@docker101.yinzhengjie.org.cn ~]# docker container ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6f147e263a54 centos:centos7.6.1810 "/bin/bash" About an hour ago Up 8 minutes centos01 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it centos01 bash [root@6f147e263a54 /]# [root@6f147e263a54 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.100.0.1 netmask 255.255.0.0 broadcast 10.100.255.255 ether 02:42:0a:64:00:01 txqueuelen 0 (Ethernet) RX packets 11 bytes 1050 (1.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 11 bytes 910 (910.0 B) 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 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 [root@6f147e263a54 /]# [root@6f147e263a54 /]# ping 10.200.0.1 PING 10.200.0.1 (10.200.0.1) 56(84) bytes of data. 64 bytes from 10.200.0.1: icmp_seq=1 ttl=62 time=0.481 ms 64 bytes from 10.200.0.1: icmp_seq=2 ttl=62 time=0.729 ms 64 bytes from 10.200.0.1: icmp_seq=3 ttl=62 time=1.71 ms 64 bytes from 10.200.0.1: icmp_seq=4 ttl=62 time=0.583 ms 64 bytes from 10.200.0.1: icmp_seq=5 ttl=62 time=1.04 ms 64 bytes from 10.200.0.1: icmp_seq=6 ttl=62 time=1.66 ms
8>.在任意一个容器中使用tcpdump工具进行抓包
[root@docker101.yinzhengjie.org.cn ~]# docker container ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6f147e263a54 centos:centos7.6.1810 "/bin/bash" About an hour ago Up 19 minutes centos01 [root@docker101.yinzhengjie.org.cn ~]# [root@docker101.yinzhengjie.org.cn ~]# docker container exec -it centos01 bash [root@6f147e263a54 /]# [root@6f147e263a54 /]# yum -y install tcpdump [root@6f147e263a54 /]# [root@6f147e263a54 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.100.0.1 netmask 255.255.0.0 broadcast 10.100.255.255 ether 02:42:0a:64:00:01 txqueuelen 0 (Ethernet) RX packets 288 bytes 27244 (26.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 288 bytes 27104 (26.4 KiB) 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 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 [root@6f147e263a54 /]# [root@6f147e263a54 /]# tcpdump -i eth0 -vnn icmp
