Failed at step CHDIR spawning /opt/kubernetes/bin/etcd: No such file or directory

-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit etcd.service has begun starting up.
Sep 12 00:47:43 m2_134 systemd[43081]: Failed at step CHDIR spawning /opt/kubernetes/bin/etcd: No such file or directory
-- Subject: Process /opt/kubernetes/bin/etcd could not be executed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

etcd.service服务配置文件中设置的工作目录必须存在，否则会报以上错误
 
WorkingDirectory=/var/lib/etcd/
 
 
mkdir -p /var/lib/etcd