安装calico

时间：2018-06-12 18:32:42 阅读：3183 评论：0 收藏：0 [点我收藏+]

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先安装docker以及etcd集群

https://www.cnblogs.com/cjsblogs/p/8717304.html

https://www.cnblogs.com/cjsblogs/p/8716976.html

注意：
(1) 这里要说明下，因为后期需要固定nginx-ingress的容器IP地址。实验在创建calico网络之后会有个BUG，即2.6.2之后版本在创建指定IP的容器的时候会报错，所以calico的版本必须为<=2.6.2。
(2) 因为需要针对nginx-ingress容器单独做端口打通，所以需要在calico的calico.env和calico-node.service添加参数CALICO_LIBNETWORK_LABEL_ENDPOINTS=true，允许calico策略读取docker容器的label标签。
(3)calico版本需要选择v1.6.2, 如v1.6.4会有bug,不建议使用,其余版本需要测试

先安装docker以及etcd集群

将etcd集群的/opt/ssl/*.pem全部拷贝到对应的docker宿主机的/opt/ssl下

daemon.json添加etcd相关配置

    "cluster-store": "etcd://172.16.150.25:2379",
    "cluster-store-opts": {
    "kv.cacertfile": "/opt/ssl/ca.pem",
    "kv.certfile": "/opt/ssl/etcd.pem",
    "kv.keyfile": "/opt/ssl/etcd-key.pem"
  }
}

重启docker

systemctl daemon-reload && systemctl restart docker

搭建配置calico
配置准备:创建calico目录(以下路径均为自定义方便管理，在配置的时候跟官网有些区别，注意修改配置文件)

mkdir -p /opt/platform/calico/certs /opt/platform/calico/log

创建证书:由于搭建etcd集群中已经创建了etcd的证书，calico只需要复用即可

cp -a /opt/ssl/*.pem /opt/platform/calico/certs/

安装配置calico
安装calicoctl

wget -O /opt/platform/calico/calicoctl https://github.com/projectcalico/calicoctl/releases/download/v1.6.2/calicoctl
chmod +x /opt/platform/calico/calicoctl

下载calicoctl镜像,如果下载不了,需要FQ

docker pull quay.io/calico/node:v2.6.2

配置calico系统服务

vim /lib/systemd/system/calico-node.service
[Unit]
Description=calico-node
After=docker.service
Requires=docker.service
[Service]
EnvironmentFile=/opt/platform/calico/calico.env
ExecStartPre=-/usr/bin/docker rm -f calico-node
ExecStart=/usr/bin/docker run --net=host --privileged --name=calico-node -e NODENAME=${CALICO_NODENAME} -e IP=${CALICO_IP} -e IP6=${CALICO_IP6} -e CALICO_NETWORKING_BACKEND=${CALICO_NETWORKING_BACKEND} -e AS=${CALICO_AS} -e NO_DEFAULT_POOLS=${CALICO_NO_DEFAULT_POOLS} -e CALICO_LIBNETWORK_ENABLED=${CALICO_LIBNETWORK_ENABLED} -e ETCD_ENDPOINTS=${ETCD_ENDPOINTS} -e ETCD_CA_CERT_FILE=${ETCD_CA_CERT_FILE} -e ETCD_CERT_FILE=${ETCD_CERT_FILE} -e ETCD_KEY_FILE=${ETCD_KEY_FILE} -v /opt/platform/calico/certs:/etc/calico/certs -v /opt/platform/calico/log:/var/log/calico -v /run/docker/plugins:/run/docker/plugins -v /lib/modules:/lib/modules -v /var/run/calico:/var/run/calico -v /var/run/docker.sock:/var/run/docker.sock quay.io/calico/node:v2.6.2
ExecStop=-/usr/bin/docker stop calico-node
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target

这里需要注意的是，官方的service配置中没有certs及docker.sock的映射路径，会导致calico找不到证书及无法启动容器

配置环境变量

vim /opt/platform/calico/calico.env
ETCD_ENDPOINTS="https://172.16.150.25:2379,https://172.16.150.26:2379,https://172.16.150.27:2379"
ETCD_CA_CERT_FILE="/etc/calico/certs/ca.pem"
ETCD_CERT_FILE="/etc/calico/certs/etcd.pem"
ETCD_KEY_FILE="/etc/calico/certs/etcd-key.pem"
CALICO_NODENAME=""
CALICO_NO_DEFAULT_POOLS=""
CALICO_IP=""
CALICO_IP6=""
CALICO_AS=""
CALICO_LIBNETWORK_ENABLED=true
CALICO_NETWORKING_BACKEND=bird

这里需要注意的是，此配置为容器内部读取的变量，所以证书路径为容器路径，而不是宿主机路径。

配置calicoctl的etcd存储

mkdir -p /etc/calico/
vim /etc/calico/calicoctl.cfg
apiVersion: v1
kind: calicoApiConfig
metadata:
spec:
  etcdEndpoints: https://172.16.150.25:2379,https://172.16.150.26:2379,https://172.16.150.27:2379
  etcdKeyFile: /opt/platform/calico/certs/etcd-key.pem
  etcdCertFile: /opt/platform/calico/certs/etcd.pem
  etcdCACertFile: /opt/platform/calico/certs/ca.pem

这里需要注意的是，这是配置calicoctl调用etcd接口的环境变量，所以证书路径为宿主机路径。calicoctl 默认读/etc/calico/下的calicoctl.cfg

启动calico

systemctl daemon-reload && systemctl enable calico-node && systemctl start calico-node

以上配置均需要在每个node节点上操作

创建calico网络

docker network create --driver calico --ipam-driver calico-ipam --subnet=10.233.0.0/16 calico
docker network ls #查看docker所有网络

--driver calico：网络使用calico驱动
--ipam-driver calico-ipam：指定使用calico的IPAM驱动管理IP
--subnet：如果需要指定容器IP的话，需要指定calico网络的IP段calico是global网络，etcd会将calico-net1同步到所有主机

创建calico网络IP池

calicoctl apply -f ipPool.yaml
apiVersion: v1
kind: ipPool
metadata:
 cidr: 10.233.0.0/16
spec:
  ipip:
    enabled: true
    mode: always
  nat-outgoing: true
  disabled: false

查看calico IPAM配置

ln -s /opt/platform/calico/calicoctl /usr/local/sbin/calicoctl  #创建命令快捷方式

calicoctl get ipPool

cidr：IP地址段，docker默认为192.168.0.0/16
ipip：IP 地址封装，能实现不同网段的宿主机同docker网络通信，mode有always和cross-subnet 2种模式，实测cross-subnet模式下容器之间无法ping通，github上有类似的问题，貌似是BUG。