（二）k8s之etcd集群
阿新 • • 發佈：2019-03-03
advertise bar 3.2 etcd 創建 ted .gz name des #（1）創建etcd證書請求
# cat etcd-csr.json { "CN": "etcd", "hosts": [ "127.0.0.1", "192.168.19.128", "192.168.19.129", "192.168.19.130" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Hangzhou", "L": "Hangzhou", "O": "k8s", "OU": "System" } ] }
#（2）生成etcd證書和私鑰
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd#（3）把etcd證書和私鑰scp到etcd節點上
scp etcd*.pem master01:/opt/kubernetes/ssl
scp etcd*.pem master02:/opt/kubernetes/ssl
scp etcd*.pem node01:/opt/kubernetes/ssl #（4）下載etcd包, 分發到etcd集群節點上
cd /tools
wget https://github.com/coreos/etcd/releases/download/v3.3.2/etcd-v3.3.2-linux-amd64.tar.gz
tar xf etcd-v3.3.2-linux-amd64.tar.gz
cd etcd-v3.3.2-linux-amd64
scp etcd* master01:/opt/kubernetes/bin/
scp etcd* master02:/opt/kubernetes/bin/
scp etcd* node01:/opt/kubernetes/bin/#（5）準備etcd配置文件
master01的配置文件
# cat /opt/kubernetes/cfg/etcd #[Member] ETCD_NAME="etcd01" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.19.128:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.19.128:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.19.128:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.19.128:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.19.128:2380,etcd02=https://192.168.19.129:2380,etcd03=https://192.168.19.130:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new
master02的配置文件
# cat /opt/kubernetes/cfg/etcd
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.19.129:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.19.129:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.19.129:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.19.129:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.19.128:2380,etcd02=https://192.168.19.129:2380,etcd03=https://192.168.19.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="newnode01的配置文件
# cat /opt/kubernetes/cfg/etcd
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.19.130:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.19.130:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.19.130:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.19.130:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.19.128:2380,etcd02=https://192.168.19.129:2380,etcd03=https://192.168.19.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new#（6）準備etcd的服務啟動腳本, 三臺etcd集群的啟動腳本文件一致
# cat /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=-/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/ca.pem --peer-trusted-ca-file=/opt/kubernetes/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target#（7）開機啟動和設置環境變量
systemctl enable etcd
systemctl start etcd
echo "export PATH=$PATH:/opt/kubernetes/bin" >>/etc/profile
source /etc/profile #（8）驗證etcd集群
cd /opt/kubernetes/ssl/
etcdctl --ca-file=ca.pem --cert-file=etcd.pem --key-file=etcd-key.pem --endpoints="https://192.168.19.128:2379,https://192.168.19.129:2379,https://192.168.19.130:2379" cluster-health
（二）k8s之etcd集群