操作步驟

1. 通過SSH依次登錄到etcd所在的Master節點，確認當前etcd版本是v3.3.8。

2. 執行下面的Shell腳本，腳本將會下載etcd-v3.4.3 binary并且啟動新版本。

   說明

   • 請對節點進行逐個升級，確保升級節點Ready后再升級其他節點的etcd。

   • 因為etcd具有高可用性，所以升級不會導致業務訪問etcd異常。

   #!/usr/bin/env bash
   etcdbin=http://aliacs-k8s-cn-hangzhou.oss.aliyuncs.com/etcd/etcd-v3.4.3/etcd
   etcdctlbin=http://aliacs-k8s-cn-hangzhou.oss.aliyuncs.com/etcd/etcd-v3.4.3/etcdctl
   
   function download(){
       wget -O etcd ${etcdbin}
       wget -O etcdctl ${etcdctlbin}
       chmod +x {etcd,etcdctl}
       mv etcd /usr/bin/etcd
       mv etcdctl /usr/bin/etcdctl
       etcd --version
   }
   
   function config() {
       ETCD_FILE=/lib/systemd/system/etcd.service
       sed -i "/ETCD_EXPERIMENTAL_BACKEND_BBOLT_FREELIST_TYPE/ d" ${ETCD_FILE}
       sed -i "/ETCD_QUOTA_BACKEND_BYTES/ d" ${ETCD_FILE}
       sed -i "/^\[Service\]/a\Environment=\"ETCD_EXPERIMENTAL_BACKEND_BBOLT_FREELIST_TYPE=map\"" ${ETCD_FILE}
       sed -i "/^\[Service\]/a\Environment=\"ETCD_QUOTA_BACKEND_BYTES=100000000000\"" ${ETCD_FILE}
       sed -i "s/initial-cluster-state new/initial-cluster-state existing/g" ${ETCD_FILE}
   
       systemctl daemon-reload
       systemctl restart etcd
   }
   
   download; config
   
   ENDPOINTS=`ps -eaf|grep etcd-servers|grep -v grep|awk -F "=" '{print $22}'|awk -F " " '{print $1}'`
   
   ETCDCTL_API=3 etcdctl \
           --endpoints=${ENDPOINTS}         \
           --cacert=/var/lib/etcd/cert/ca.pem         \
           --cert=/var/lib/etcd/cert/etcd-client.pem         \
           --key=/var/lib/etcd/cert/etcd-client-key.pem \
           member list

3. 執行以下命令，確認etcd進程啟動成功。

   ps aux|grep etcd