标签:int 环境变量 gen lib ini ast gate master emd
#(1)在跳板机上生成flanneld证书#cd /temp/ssl/
cat > flanneld-csr.json <<EOF
{
"CN": "flanneld",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Hangzhou",
"L": "Hangzhou",
"O": "k8s",
"OU": "System"
}
]
}
EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes flanneld-csr.json | cfssljson -bare flanneld
#(2)选择一台etcd集群节点机器, 向etcd注册flannel相关信息并验证
配置环境变量
export CLUSTER_CIDR="172.30.0.0/16"
export ETCD_ENDPOINTS="https://192.168.19.128:2379,https://192.168.19.129:2379,https://192.168.19.130:2379"
export FLANNEL_ETCD_PREFIX="/kubernetes/network"
向etcd注册flannel相关信息
etcdctl --endpoints=${ETCD_ENDPOINTS} --ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/flanneld.pem --key-file=/opt/kubernetes/ssl/flanneld-key.pem set ${FLANNEL_ETCD_PREFIX}/config ‘{"Network":"‘${CLUSTER_CIDR}‘", "SubnetLen": 24, "Backend": {"Type": "vxlan"}}‘
验证
etcdctl --endpoints=${ETCD_ENDPOINTS} --ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/flanneld.pem --key-file=/opt/kubernetes/ssl/flanneld-key.pem get ${FLANNEL_ETCD_PREFIX}/config
#(3)在跳板机上下载flanneld
cd /tools
wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
tar xf flannel-v0.10.0-linux-amd64.tar.gz
#(4)在跳板机上准备flanneld配置文件
#cat >/temp/ssl/flanneld<<EOF
FLANNEL_OPTIONS="-etcd-cafile=/opt/kubernetes/ssl/ca.pem -etcd-certfile=/opt/kubernetes/ssl/flanneld.pem -etcd-keyfile=/opt/kubernetes/ssl/flanneld-key.pem -etcd-endpoints=https://192.168.19.128:2379,https://192.168.19.129:2379,https://192.168.19.130:2379 -etcd-prefix=/kubernetes/network"
EOF
#(5)在跳板机上准备flanneld启动脚本
cat >/temp/ssl/flanneld.service<<EOF
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
[Install]
WantedBy=multi-user.target
#(6)在跳板机上准备docker启动脚本文件
cat > /temp/ssl/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd \$DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP \$MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOF
#(7)在跳板机上把flanneld证书和私钥文件, flanneld配置文件, flanneld启动脚本文件, docker的启动配置文件发送给master和node节点
ansible k8s -m copy -a ‘src=/temp/ssl/flanneld-key.pem,dest=/opt/kubernetes/ssl/flanneld-key.pem‘
ansible k8s -m copy -a ‘src=/temp/ssl/flanneld.pem,dest=/opt/kubernetes/ssl/flanneld.pem‘
ansible k8s -m copy -a ‘src=/temp/ssl/flanneld dest=/opt/kubernetes/cfg/flanneld‘
ansible k8s -m copy -a ‘src=/temp/ssl/flanneld.service dest=/usr/lib/systemd/system/flanneld.service‘
ansible k8s -m copy -a ‘src=/temp/ssl/docker.service dest=/usr/lib/systemd/system/docker.service‘
ansible k8s -m copy -a ‘src=/tools/flanneld dest=/opt/kubernetes/bin/flanneld‘
ansible k8s -m copy -a ‘src=/tools/mk-docker-opts.sh dest=/opt/kubernetes/bin/mk-docker-opts.sh‘
#(8)在master和node节点重启flanend和docker服务
systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld
systemctl restart docker
#(9)验证
获取flannel在每个节点的网段信息
export CLUSTER_CIDR="172.30.0.0/16"
export ETCD_ENDPOINTS="https://192.168.19.128:2379,https://192.168.19.129:2379,https://192.168.19.130:2379"
export FLANNEL_ETCD_PREFIX="/kubernetes/network"
etcdctl --endpoints=${ETCD_ENDPOINTS} --ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/flanneld.pem --key-file=/opt/kubernetes/ssl/flanneld-key.pem ls ${FLANNEL_ETCD_PREFIX}/subnets
在master和node节点上查看路由表: 在每个节点上都能看到其他节点的路由
master节点和node节点, docker0的ip地址使用的是flannel网段地址范围, 也是pod容器的网关
master节点和node节点之间的flannel网段之间都能ping通, 说明flannel网络部署完成
标签:int 环境变量 gen lib ini ast gate master emd
原文地址:https://blog.51cto.com/1000682/2357989