etcd+calico集群的部署

>> from zhuhaiqing.info

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