image.png

evth-pair

启动的容器是带网卡的，并且是成对的 evth-pair 就是一队虚拟设备接口，成对出现，一端连接协议，一端彼此相连 Openstac、Docker容器之间的连接，ovs的连接，都是用的 evth-pair 技术

image.png

测试连通性

  1. [root@localhost ~]# docker exec -it tomcat02 ping 172.17.0.2
  2. PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.
  3. 64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.374 ms
  4. 64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.092 ms
  6. #容器和容器之间是可以通信的

image.png

—link

单项绑定网络，本质就是写个host指向

  1. [root@localhost ~]# docker run -d -P --name tomcat03 --link tomcat02 tomcat
  2. WARNING: IPv4 forwarding is disabled. Networking will not work.
  3. c7c93fa009c3833788a0b98045c68be2fa37b0e543adbd7f4bcc3a1291dcf2c0
  4. [root@localhost ~]# docker exec -it tomcat03 ping tomcat02
  5. PING tomcat02 (172.17.0.3) 56(84) bytes of data.
  6. 64 bytes from tomcat02 (172.17.0.3): icmp_seq=1 ttl=64 time=0.291 ms
  7. 64 bytes from tomcat02 (172.17.0.3): icmp_seq=2 ttl=64 time=0.116 ms
  8. 64 bytes from tomcat02 (172.17.0.3): icmp_seq=3 ttl=64 time=0.123 ms
  9. 64 bytes from tomcat02 (172.17.0.3): icmp_seq=4 ttl=64 time=0.126 ms

自定义网络

image.png

网络模式： bridge：桥接docker none：不配置网络 host：和宿主机共享 container：容器网络互连（用的少，局限性大）

自定义网络好处： 可以直接维护对应的网络表不需要再一个个link，平时强烈推荐使用

  1. [root@localhost ~]# docker network create --driver bridge --subnet 192.168.1.0/24 --gateway 192.168.1.1 diynet
  2. 9a1ff71f54dc9ae2d53db1aea234b6eb1c519afea23650fe8e30a5316a38f25c
  3. [root@localhost ~]# docker network ls
  4. NETWORK ID     NAME      DRIVER    SCOPE
  5. 6474be779eb7   bridge    bridge    local
  6. 9a1ff71f54dc   diynet    bridge    local
  7. 93cf61d9aac6   host      host      local
  8. ea6557cc9465   none      null      local
  10. [root@localhost ~]# docker network inspect diynet
  11. [
  12.     {
  13.         "Name": "diynet",
  14.         "Id": "9a1ff71f54dc9ae2d53db1aea234b6eb1c519afea23650fe8e30a5316a38f25c",
  15.         "Created": "2021-07-27T21:38:38.270250531+08:00",
  16.         "Scope": "local",
  17.         "Driver": "bridge",
  18.         "EnableIPv6": false,
  19.         "IPAM": {
  20.             "Driver": "default",
  21.             "Options": {},
  22.             "Config": [
  23.                 {
  24.                     "Subnet": "192.168.1.0/24",
  25.                     "Gateway": "192.168.1.1"
  26.                 }
  27.             ]
  28.         },
  29.         "Internal": false,
  30.         "Attachable": false,
  31.         "Ingress": false,
  32.         "ConfigFrom": {
  33.             "Network": ""
  34.         },
  35.         "ConfigOnly": false,
  36.         "Containers": {},
  37.         "Options": {},
  38.         "Labels": {}
  39.     }
  40. ]
  42. # 指定自定义网络创建
  43. [root@localhost ~]# docker run -d -P --name tomcat01 --net diynet tomcat
  44. WARNING: IPv4 forwarding is disabled. Networking will not work.
  45. a55408b856e231251a797cc714f9bc6c6945d03b4b507e2fe5392953d9078d64
  46. [root@localhost ~]# docker run -d -P --name tomcat02 --net diynet tomcat
  47. WARNING: IPv4 forwarding is disabled. Networking will not work.
  48. b36969db2005b9be92b6d1a7dee86bac689713dd98410606c851c8f5a178c9fc
  50. # 再次查看diynet详情
  51. [root@localhost ~]# docker network inspect diynet
  52. [
  53.     {
  54.         "Name": "diynet",
  55.         "Id": "9a1ff71f54dc9ae2d53db1aea234b6eb1c519afea23650fe8e30a5316a38f25c",
  56.         "Created": "2021-07-27T21:38:38.270250531+08:00",
  57.         "Scope": "local",
  58.         "Driver": "bridge",
  59.         "EnableIPv6": false,
  60.         "IPAM": {
  61.             "Driver": "default",
  62.             "Options": {},
  63.             "Config": [
  64.                 {
  65.                     "Subnet": "192.168.1.0/24",
  66.                     "Gateway": "192.168.1.1"
  67.                 }
  68.             ]
  69.         },
  70.         "Internal": false,
  71.         "Attachable": false,
  72.         "Ingress": false,
  73.         "ConfigFrom": {
  74.             "Network": ""
  75.         },
  76.         "ConfigOnly": false,
  77.         "Containers": {
  78.             "a55408b856e231251a797cc714f9bc6c6945d03b4b507e2fe5392953d9078d64": {
  79.                 "Name": "tomcat01",
  80.                 "EndpointID": "e3219aac6eae7461c74b6aefdee19a0ba6c05395af1f6f1e00e66f55b791e208",
  81.                 "MacAddress": "02:42:c0:a8:01:02",
  82.                 "IPv4Address": "192.168.1.2/24",
  83.                 "IPv6Address": ""
  84.             },
  85.             "b36969db2005b9be92b6d1a7dee86bac689713dd98410606c851c8f5a178c9fc": {
  86.                 "Name": "tomcat02",
  87.                 "EndpointID": "fa7351d0f4bb725385247bff70820dad417e3292bd774be58ab9ff4fdb79633f",
  88.                 "MacAddress": "02:42:c0:a8:01:03",
  89.                 "IPv4Address": "192.168.1.3/24",
  90.                 "IPv6Address": ""
  91.             }
  92.         },
  93.         "Options": {},
  94.         "Labels": {}
  95.     }
  96. ]
  98. # 测试结果
  99. [root@localhost ~]# docker exec -it tomcat01 ping 192.168.1.3
  100. PING 192.168.1.3 (192.168.1.3) 56(84) bytes of data.
  101. 64 bytes from 192.168.1.3: icmp_seq=1 ttl=64 time=0.185 ms
  102. 64 bytes from 192.168.1.3: icmp_seq=2 ttl=64 time=0.121 ms
  103. 64 bytes from 192.168.1.3: icmp_seq=2 ttl=64 time=0.131 ms
  105. [root@localhost ~]# docker exec -it tomcat01 ping tomcat02
  106. PING tomcat02 (192.168.1.3) 56(84) bytes of data.
  107. 64 bytes from tomcat02.diynet (192.168.1.3): icmp_seq=1 ttl=64 time=0.130 ms
  108. 64 bytes from tomcat02.diynet (192.168.1.3): icmp_seq=2 ttl=64 time=0.148 ms
  109. 64 bytes from tomcat02.diynet (192.168.1.3): icmp_seq=3 ttl=64 time=0.082 ms

网络连通

image.png
image.png

实际上打通就是将另一个容器的ip放到了自定义网络下 也就是一个容器两个ip段

  1. [root@localhost ~]# docker run -d -P --name tomcat-net01 --net diynet tomcat
  2. WARNING: IPv4 forwarding is disabled. Networking will not work.
  3. d9ed9f6cbab8688c4cc9583d7cd7534e2b1b99aa0c4cc2af2c136896cab77308
  4. [root@localhost ~]# docker run -d -P --name tomcat-net02 --net diynet tomcat
  5. WARNING: IPv4 forwarding is disabled. Networking will not work.
  6. 4495e3e542d95d81f0a986a8908138904246b162829f1672b4aa42f6a5ebde66
  7. [root@localhost ~]# docker run -d -P --name tomcat01 tomcat
  8. WARNING: IPv4 forwarding is disabled. Networking will not work.
  9. 3feb35fd38e67bb350e52a4b7d35cc6fa871a7e23542b2504505072027503374
  10. [root@localhost ~]# docker run -d -P --name tomcat02 tomcat
  11. WARNING: IPv4 forwarding is disabled. Networking will not work.
  12. cf7adcd0e974cbf5cbc9d117f6b7dbfccf9a52ef02a32f3679950b28f89f8516
  14. # connect打通容器和自定义网络
  15. [root@localhost ~]# docker network connect diynet tomcat01
  16. [root@localhost ~]# docker network connect diynet tomcat02
  17. # 查看效果
  18. [root@localhost ~]# docker network inspect diynet 
  19. [
  20.     {
  21.         "Name": "diynet",
  22.         "Id": "9a1ff71f54dc9ae2d53db1aea234b6eb1c519afea23650fe8e30a5316a38f25c",
  23.         "Created": "2021-07-27T21:38:38.270250531+08:00",
  24.         "Scope": "local",
  25.         "Driver": "bridge",
  26.         "EnableIPv6": false,
  27.         "IPAM": {
  28.             "Driver": "default",
  29.             "Options": {},
  30.             "Config": [
  31.                 {
  32.                     "Subnet": "192.168.1.0/24",
  33.                     "Gateway": "192.168.1.1"
  34.                 }
  35.             ]
  36.         },
  37.         "Internal": false,
  38.         "Attachable": false,
  39.         "Ingress": false,
  40.         "ConfigFrom": {
  41.             "Network": ""
  42.         },
  43.         "ConfigOnly": false,
  44.         "Containers": {
  45.             "3feb35fd38e67bb350e52a4b7d35cc6fa871a7e23542b2504505072027503374": {
  46.                 "Name": "tomcat01",
  47.                 "EndpointID": "8800598e6f75e197295663d51d808abdff7f61a4f9c2d6b6818e40d0dc6278fb",
  48.                 "MacAddress": "02:42:c0:a8:01:04",
  49.                 "IPv4Address": "192.168.1.4/24",
  50.                 "IPv6Address": ""
  51.             },
  52.             "4495e3e542d95d81f0a986a8908138904246b162829f1672b4aa42f6a5ebde66": {
  53.                 "Name": "tomcat-net02",
  54.                 "EndpointID": "5e492c846949d0772b23c835f964e8e9974531d467a3f9c1250278d7b36febbf",
  55.                 "MacAddress": "02:42:c0:a8:01:03",
  56.                 "IPv4Address": "192.168.1.3/24",
  57.                 "IPv6Address": ""
  58.             },
  59.             "cf7adcd0e974cbf5cbc9d117f6b7dbfccf9a52ef02a32f3679950b28f89f8516": {
  60.                 "Name": "tomcat02",
  61.                 "EndpointID": "fa4270d46f4a22abe1663859714b349caf314026e844881843fb1cec5c3e6db4",
  62.                 "MacAddress": "02:42:c0:a8:01:05",
  63.                 "IPv4Address": "192.168.1.5/24",
  64.                 "IPv6Address": ""
  65.             },
  66.             "d9ed9f6cbab8688c4cc9583d7cd7534e2b1b99aa0c4cc2af2c136896cab77308": {
  67.                 "Name": "tomcat-net01",
  68.                 "EndpointID": "35d242d10811dad92f8b1207045bb18627ffba9ecc004706ae2eea0bb009a5af",
  69.                 "MacAddress": "02:42:c0:a8:01:02",
  70.                 "IPv4Address": "192.168.1.2/24",
  71.                 "IPv6Address": ""
  72.             }
  73.         },
  74.         "Options": {},
  75.         "Labels": {}
  76.     }
  77. ]
  79. # 测试
  80. [root@localhost ~]# docker exec -it tomcat01 ping tomcat-net01
  81. PING tomcat-net01 (192.168.1.2) 56(84) bytes of data.
  82. 64 bytes from tomcat-net01.diynet (192.168.1.2): icmp_seq=1 ttl=64 time=0.347 ms
  83. 64 bytes from tomcat-net01.diynet (192.168.1.2): icmp_seq=2 ttl=64 time=0.692 ms
  84. 64 bytes from tomcat-net01.diynet (192.168.1.2): icmp_seq=3 ttl=64 time=0.118 ms
  85. [root@localhost ~]# docker exec -it tomcat01 ping tomcat-net02
  86. PING tomcat-net02 (192.168.1.3) 56(84) bytes of data.
  87. 64 bytes from tomcat-net02.diynet (192.168.1.3): icmp_seq=1 ttl=64 time=0.189 ms
  88. 64 bytes from tomcat-net02.diynet (192.168.1.3): icmp_seq=2 ttl=64 time=0.126 ms

集群部署

  1. # 通过shell脚本来创建六个redis配置
  2. for port in $(seq 1 6);
  3. do
  4. mkdir -p /mydata/redis/node-${port}/conf
  5. touch /mydata/redis/node-${port}/conf/redis.conf
  6. cat << eof >/mydata/redis/node-${port}/conf/redis.conf
  7. port 6379
  8. bind 0.0.0.0
  9. cluster-enabled yes
  10. cluster-node-timout 5000
  11. cluster-announce-ip 172.38.0.1${port}
  12. cluster-announce-bus-port 16379
  13. appendonly yes
  14. eof
  15. done
  17. # shell脚本启动
  18. for port in $(seq 1 6);
  19. do
  20. docker run -p 637${port}:6379 -p 1637${port}:16379 --name redis-${port} \
  21. -v /mydata/redis/node-${port}/data:/data \
  22. -v /mydata/redis/node-${port}/conf/redis.conf:/etc/redis/redis.conf \
  23. -d --net redis --ip 172.38.0.1${port} redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf;
  24. done
  26. # 创建集群
  27. redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 172.38.0.16:6379 --cluster-replicas 1
  29. # 进入集群
  30. docker exec -it redis-1 /bin/sh
  31. redis-cli -c
  32. cluster info
  33. cluster nodes
  34. # set 值，查看哪个节点处理了
  35. set a b
  37. # 关闭当前运行的master节点，再查看集群
  38. docker stop redis-3
  39. redis-cli -c
  40. get a