k8s-1(etcd安装)

1、环境准备

准备三台服务器
CentOS 7.4
master    192.168.56.11
node01    192.168.56.12
node02    192.168.56.13

etcd 二进制包下载地址

https://github.com/etcd-io/etcd/releases

上传etcd二进制文件

[root@linux-node1 k8s]# pwd
/root/k8s
[root@linux-node1 k8s]# ll *.gz
-rw-r--r--. 1 root root  11353259 Jan  9 16:57 etcd-v3.3.10-linux-amd64.tar.gz
-rw-r--r--. 1 root root   9706487 Jan  9 18:15 flannel-v0.10.0-linux-amd64.tar.gz
-rw-r--r--. 1 root root 422748874 Jan  9 17:00 kubernetes-server-linux-amd64.tar.gz
[root@linux-node1 k8s]# tar xf etcd-v3.3.10-linux-amd64.tar.gz 
[root@linux-node1 k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/　

2、脚本

安装cfssl脚本

[root@linux-node1 k8s]# cat cfssl.sh 
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo

etcd证书脚本

[root@linux-node1 etcd-cert]# cat etcd-cert.sh 
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

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

#-----------------------

# 改成etcd集群ip
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.56.11",
    "192.168.56.12",
    "192.168.56.13"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

etcd自启动脚本

[root@linux-node1 k8s]# cat etcd.sh 
#!/bin/bash
# example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380

ETCD_NAME=$1
ETCD_IP=$2
ETCD_CLUSTER=$3

WORK_DIR=/opt/etcd

cat <<EOF >$WORK_DIR/cfg/etcd
#[Member]
ETCD_NAME="${ETCD_NAME}"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://${ETCD_IP}:2380,${ETCD_CLUSTER}"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

cat <<EOF >/usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=${WORK_DIR}/cfg/etcd
ExecStart=${WORK_DIR}/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_TOKEN} 
--initial-cluster-state=new 
--cert-file=${WORK_DIR}/ssl/server.pem 
--key-file=${WORK_DIR}/ssl/server-key.pem 
--peer-cert-file=${WORK_DIR}/ssl/server.pem 
--peer-key-file=${WORK_DIR}/ssl/server-key.pem 
--trusted-ca-file=${WORK_DIR}/ssl/ca.pem 
--peer-trusted-ca-file=${WORK_DIR}/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable etcd
systemctl restart etcd

 3、安装

准备：创建etcd 目录
mkdir /opt/etcd/{cfg,bin,ssl} -p

一、安装cfssl
[root@linux-node1 k8s]# pwd
/root/k8s
[root@linux-node1 k8s]# sh cfssl.sh 
二、生产etcd证书
[root@linux-node1 etcd-cert]# pwd
/root/k8s/etcd-cert
[root@linux-node1 etcd-cert]# sh etcd-cert.sh 
[root@linux-node1 etcd-cert]# ls
ca-config.json  ca.csr  ca-csr.json  ca-key.pem  ca.pem  etcd-cert.sh  server.csr  server-csr.json  server-key.pem  server.pem
三、拷贝证书
[root@linux-node1 etcd-cert]# cp *.pem /opt/etcd/ssl/
[root@linux-node1 etcd-cert]# ls /opt/etcd/ssl/
ca-key.pem  ca.pem  server-key.pem  server.pem
四、生成etcd启动文件
[root@linux-node1 k8s]# pwd
/root/k8s
[root@linux-node1 k8s]# sh  etcd.sh etcd01 192.168.56.11 etcd02=https://192.168.56.12:2380,etcd03=https://192.168.56.13:2380

4、拷贝配置文件

scp -r /opt/etcd root@192.168.56.13:/opt/
scp -r /opt/etcd root@192.168.56.12:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.56.12:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@192.168.56.13:/usr/lib/systemd/system/

[root@linux-node2 ssl]# cat /opt/etcd/cfg/etcd 
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.56.12:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.56.12:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.56.12:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.56.12:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.56.11:2380,etcd02=https://192.168.56.12:2380,etcd03=https://192.168.56.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@linux-node3 ssl]# cat /opt/etcd/cfg/etcd 
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.56.13:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.56.13:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.56.13:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.56.13:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.56.11:2380,etcd02=https://192.168.56.12:2380,etcd03=https://192.168.56.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

5、启动etcd

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd　

6、检查集群状态

[root@linux-node1 k8s]# cd /opt/etcd/ssl/
[root@linux-node1 ssl]#  /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379" cluster-health
member 16946dc3570ef393 is healthy: got healthy result from https://192.168.56.13:2379
member 2c14ec94752d5694 is healthy: got healthy result from https://192.168.56.12:2379
member bf624c9e82dced96 is healthy: got healthy result from https://192.168.56.11:2379
cluster is healthy