kubernetes 二进制部署之网络部署（Flannel）

tips：安装 Falnnel 之需要安装 Etcd ，Falnnel 要用 Etcd 存储自身一个子网信息。

1、安装前准备：

安装包地址：https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz

先将定义的子网段写入到etcd集群里面：

ETCDCTL_API=2 /opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.17.138:2379,https://192.168.17.143:2379,https://192.168.17.144:2379" set /coreos.com/network/config  '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

 执行如下命令查看是否写入成功

ETCDCTL_API=2 /opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.17.138:2379,https://192.168.17.143:2379,https://192.168.17.144:2379" get /coreos.com/network/config

2、Flannel

2.1、下载安装

wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz

 tar -zxvf flannel-v0.10.0-linux-amd64.tar.gz

2.2 创建安装目录

mkdir /opt/falnnel/{bin,cfg} -p

 将移动可执行文件、脚本粘贴到到安装目录下

mv flanneld mk-docker-opts.sh /opt/falnnel/bin

2.3 配置进行时~

vi /opt/falnnel/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.17.138:2379,https://192.168.17.143:2379,https://192.168.17.144:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"

2.4 添加服务

vi /usr/lib/systemd/system/flanneld.service

[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/falnnel/cfg/flanneld
ExecStart=/opt/falnnel/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/opt/falnnel/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

2.5 将docker网络引用Flannel

vi  /usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
EnvironmentFile=/run/flannel/subnet.env
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target

2.5 重启、加入开机自启，并验证

systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld
systemctl restart docker