部署ETCD集群

环境介绍

10.0.0.179  etcd01

10,0,0,180  etcd02

10,0,0.181  etcd03

1.安装cfssl证书生成工具

yum install -y wget

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64 
mv cfssl_linux-amd64 /usr/local/bin/cfssl 
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson 
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

2.生成ca 配置

cat >ca-config.json<<EOF{

"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "87600h"
}
}
}
}
EOF

3.部署etcd 证书生成 etcd-ca-key.pem  etcd-ca.pem  etcd-key.pem  etcd.pem

cat >etcd-ca-csr.json<<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF

cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare etcd-ca

cat >etcd-csr.json<<EOF
{
"CN": "etcd",
"hosts": [
"127.0.0.1",
"10.0.0.179",
"10.0.0.180",
"10.0.0.181"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF

cfssl gencert -ca=etcd-ca.pem -ca-key=etcd-ca-key.pem -config=ca-config.json 
-profile=kubernetes etcd-csr.json | cfssljson -bare etcd

4.建立etcd目录和加入变量
下载二进制包 ：wget https://github.com/coreos/etcd/releases/download/v3.2.18/etcd-v3.2.18-linux-amd64.tar.gz
mv etcd etcdctl 移动到/opt/kubernetes/bin下面 
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/opt/kubernetes/bin 加入环境变量

5.创建etcd配置文件
cat > /usr/lib/systemd/system/etcd.service <<EOF

[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=-/opt/kubernetes/cfg/etcd
ExecStart=/opt/kubernetes/bin/etcd 
--name=${ETCD_NAME} 
--data-dir=${ETCD_DATA_DIR} 
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} 
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} 
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} 
--initial-cluster=${ETCD_INITIAL_CLUSTER} 
--initial-cluster-token=${ETCD_INITIAL_CLUSTER} 
--initial-cluster-state=new 
--cert-file=/opt/kubernetes/ssl/etcd.pem 
--key-file=/opt/kubernetes/ssl/etcd-key.pem 
--peer-cert-file=/opt/kubernetes/ssl/etcd.pem 
--peer-key-file=/opt/kubernetes/ssl/etcd-key.pem 
--trusted-ca-file=/opt/kubernetes/ssl/etcd-ca.pem 
--peer-trusted-ca-file=/opt/kubernetes/ssl/etcd-ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target

启动配置

cat > /opt/kubernetes/cfg/etcd <<EOF

#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.180:2380" 
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.180:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.180:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.180:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://10.0.0.179:2380,etcd02=https://10.0.0.180:2380,etcd03=https://10.0.0.181:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new

6检查集群状态

etcdctl --ca-file=etcd-ca.pem --cert-file=etcd.pem --key-file=etcd-key.pem --endpoints="https://10.0.0.179:2379,https://10.0.0.180:2379,https://10.0.0.181:2379" cluster-health