etcd+calico集群的部署
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etcd单机模式
设置环境变量
export HostIP="192.168.12.50"
执行如下命令，打开etcd的客户端连接端口4001和2379、etcd互联端口2380
如果是第一次执行此命令，docker会下载最新的etcd官方镜像
docker run -d -v /usr/share/ca-certificates/:/etc/ssl/certs -p 4001:4001 -p 2380:2380 -p 2379:2379 \
--name etcd quay.io/coreos/etcd \
-name etcd0 \
-advertise-client-urls http://${HostIP}:2379,http://${HostIP}:4001 \
-listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 \
-initial-advertise-peer-urls http://${HostIP}:2380 \
-listen-peer-urls http://0.0.0.0:2380 \
-initial-cluster-token etcd-cluster-1 \
-initial-cluster etcd0=http://${HostIP}:2380 \
-initial-cluster-state new
选择上面2个端口中的任意一个，检测一下节点情况：
curl -L http://127.0.0.1:2379/v2/members
多节点etcd集群
配置多节点etcd集群和单节点类似，最主要的区别是-initial-cluster参数，它表示了各个成员的互联地址（peer url）:
节点01执行如下命令：
docker run -d -p 4001:4001 -p 2380:2380 -p 2379:2379 \ --restart=always \ --name etcd quay.io/coreos/etcd \ -name etcd01 \ -advertise-client-urls http://192.168.73.140:2379,http://192.168.73.140:4001 \ -listen-client-urls http://0.0.0.0:2379 \ -initial-advertise-peer-urls http://192.168.73.140:2380 \ -listen-peer-urls http://0.0.0.0:2380 \ -initial-cluster-token etcd-cluster \ -initial-cluster "etcd01=http://192.168.73.140:2380,etcd02=http://192.168.73.137:2380" \ -initial-cluster-state new
节点02执行如下命令
docker run -d -p 4001:4001 -p 2380:2380 -p 2379:2379 \ --restart=always \ --name etcd quay.io/coreos/etcd \ -name etcd02 \ -advertise-client-urls http://192.168.73.137:2379,http://192.168.73.137:4001 \ -listen-client-urls http://0.0.0.0:2379 \ -initial-advertise-peer-urls http://192.168.73.137:2380 \ -listen-peer-urls http://0.0.0.0:2380 \ -initial-cluster-token etcd-cluster \ -initial-cluster "etcd01=http://192.168.73.140:2380,etcd02=http://192.168.73.137:2380" \ -initial-cluster-state new
检查集群连接情况，分别在各个节点执行如下命令：
curl -L http://127.0.0.1:2379/v2/members
如果正常，将看到2个节点的信息，且在各个节点看到的结果都应该是一样的：
{"members":[{"id":"2bd5fcc327f74dd5","name":"etcd01","peerURLs":["http://192.168.73.140:2380"],"clientURLs":["http://192.168.73.140:2379","http://192.168.73.140:4001"]},{"id":"c8a9cac165026b12","name":"etcd02","peerURLs":["http://192.168.73.137:2380"],"clientURLs":["http://192.168.73.137:2379","http://192.168.73.137:4001"]}]}
扩展etcd集群
在集群中的任何一台etcd节点上执行命令，将新节点注册到集群：
curl http://127.0.0.1:2379/v2/members -XPOST -H "Content-Type: application/json" -d '{"peerURLs": ["http://192.168.73.172:2380"]}'
在新节点上启动etcd容器，注意-initial-cluster-state参数为existing
docker run -d -p 4001:4001 -p 2380:2380 -p 2379:2379 \ --restart=always \ --name etcd quay.io/coreos/etcd \ -name etcd03 \ -advertise-client-urls http://192.168.73.150:2379,http://192.168.73.150:4001 \ -listen-client-urls http://0.0.0.0:2379 \ -initial-advertise-peer-urls http://192.168.73.150:2380 \ -listen-peer-urls http://0.0.0.0:2380 \ -initial-cluster-token etcd-cluster \ -initial-cluster "etcd01=http://192.168.73.140:2380,etcd02=http://192.168.73.137:2380,etcd03=http://192.168.73.150:2380" \ -initial-cluster-state existing
任意节点执行健康检查：
[root@docker01 ~]# etcdctl cluster-health member 2bd5fcc327f74dd5 is healthy: got healthy result from http://192.168.73.140:2379 member c8a9cac165026b12 is healthy: got healthy result from http://192.168.73.137:2379 cluster is healthy
calico部署
现在物理主机下载calicoctl，下载页面：
https://github.com/projectcalico/calico-containers/releases
并将下载的calicoctl复制到/usr/local/bin下面
在第一台etcd节点上执行如下命令：
[root@docker01 ~]# calicoctl node #如果是第一次执行该命令，会需要联网下载calico node镜像并启动 Running Docker container with the following command: docker run -d --restart=always --net=host --privileged --name=calico-node -e HOSTNAME=docker01 -e IP= -e IP6= -e CALICO_NETWORKING=true -e AS= -e NO_DEFAULT_POOLS= -e ETCD_AUTHORITY=127.0.0.1:2379 -e ETCD_SCHEME=http -v /var/log/calico:/var/log/calico -v /var/run/calico:/var/run/calico calico/node:v0.18.0 Calico node is running with id: 60b284221a94b418509f86d3c8d7073e11ab3c2a3ca17e4efd2568e97791ff33 Waiting for successful startup No IP provided. Using detected IP: 192.168.73.140 Calico node started successfully
在第二台etcd节点上执行：
[root@Docker01 ~]# calicoctl node --如果是第一次执行该命令，会需要联网下载calico node镜像 Running Docker container with the following command: docker run -d --restart=always --net=host --privileged --name=calico-node -e HOSTNAME=docker01 -e IP= -e IP6= -e CALICO_NETWORKING=true -e AS= -e NO_DEFAULT_POOLS= -e ETCD_AUTHORITY=127.0.0.1:2379 -e ETCD_SCHEME=http -v /var/log/calico:/var/log/calico -v /var/run/calico:/var/run/calico calico/node:v0.18.0 Calico node is running with id: 72e7213852e529a3588249d85f904e38a92d671add3cdfe5493687aab129f5e2 Waiting for successful startup No IP provided. Using detected IP: 192.168.73.137 Calico node started successfully
在任意一台calico节点上执行如下命令，配置地址资源池：
[root@Docker01 ~]# calicoctl pool remove 192.168.0.0/16 #删除默认资源池 [root@Docker01 ~]# calicoctl pool add 10.0.238.0/24 --nat-outgoing --ipip #添加新的IP资源池，支持跨子网的主机上的Docker间网络互通，需要添加--ipip参数；如果要Docker访问外网，需要添加--nat-outgoing参数 [root@docker01 ~]# calicoctl pool show #查看配置后的结果
在任意calico节点，检查Calico状态：
[root@docker01 ~]# calicoctl status calico-node container is running. Status: Up 3 hours Running felix version 1.4.0rc1 IPv4 BGP status IP: 192.168.73.140 AS Number: 64511 (inherited) +----------------+-------------------+-------+----------+-------------+ | Peer address | Peer type | State | Since | Info | +----------------+-------------------+-------+----------+-------------+ | 192.168.73.137 | node-to-node mesh | up | 09:18:51 | Established | +----------------+-------------------+-------+----------+-------------+ IPv6 BGP status No IPv6 address configured.
配置docker容器网络
分别在2个节点上启动业务一个容器，不加载网络驱动，后面网络让Calico来配置：
[root@docker01 ~]# docker run --name test01 -itd --log-driver none --net none daocloud.io/library/centos:6.6 /bin/bash [root@docker02 ~]# docker run --name test02 -itd --log-driver none --net none daocloud.io/library/centos:6.6 /bin/bash
在任意的calico节点创建Calico profile：
[root@docker01 ~]# calicoctl profile add starboss
通过Calico手动为容器指定ip，注意此ip需要符合calico pool的ip配置：
[root@docker01 ~]# calicoctl container add test01 10.0.238.10 IP 10.0.238.10 added to test01 [root@docker02 ~]# calicoctl container add test02 10.0.238.11 IP 10.0.238.10 added to test02
在各个calico节点上，分别将需要互相访问的节点加入同一个profile：
[root@docker01 ~]# calicoctl container test01 profile set starboss Profile(s) set to starboss. [root@docker02 ~]# calicoctl container test02 profile set starboss Profile(s) set to starboss.
在任意节点查看Calico节点的配置情况：
[root@docker01 ~]# calicoctl endpoint show --detailed +----------+-----------------+------------------------------------------------------------------+----------------------------------+-----------------+-------------------+----------+--------+ | Hostname | Orchestrator ID | Workload ID | Endpoint ID | Addresses | MAC | Profiles | State | +----------+-----------------+------------------------------------------------------------------+----------------------------------+-----------------+-------------------+----------+--------+ | docker01 | docker | 8f935b0441739f52334e9f16099a2b52e2c982e3aef3190e02dd7ce67e61a853 | 75b0e79a022211e6975c000c29308ed8 | 192.168.0.10/32 | 1e:14:2d:bf:51:f5 | starboss | active | | docker02 | docker | 3d0a8f39753537592f3e38d7604b0b6312039f3bf57cf13d91e953e7e058263e | 8efb263e022211e6a180000c295008af | 192.168.0.11/32 | ee:2b:c2:5e:b6:c5 | starboss | active | +----------+-----------------+------------------------------------------------------------------+----------------------------------+-----------------+-------------------+----------+--------+
测试，在一台物理主机中ping另外一台主机中的容器：
[root@docker01 ~]# docker exec test01 ping 192.168.0.11 PING 192.168.0.11 (192.168.0.11) 56(84) bytes of data. 64 bytes from 192.168.0.11: icmp_seq=1 ttl=62 time=0.557 ms 64 bytes from 192.168.0.11: icmp_seq=2 ttl=62 time=0.603 ms 64 bytes from 192.168.0.11: icmp_seq=3 ttl=62 time=0.656 ms 64 bytes from 192.168.0.11: icmp_seq=4 ttl=62 time=0.386 ms
