Rancher2 etcd内存占用高

Rancher 2.1.4 集群安装后用着用着就发现主机的内存占用非常高，占用的进程是Etcd。
经查验证，这算是个bug吧。https://github.com/rancher/rancher/issues/14322

kubectl get templatecontents | wc -l 得到的值很大。
升级到2.2.3后，templatecontents清理了，但内存还是没降下来

参考https://rancher.com/docs/rancher/v2.x/en/troubleshooting/kubernetes-components/

docker exec etcd etcdctl endpoint status \
  --endpoints=$(docker exec etcd /bin/sh -c \
  "etcdctl member list | cut -d, -f5 | sed -e 's/ //g' | paste -sd ','") --write-out table
rev=$(docker exec etcd etcdctl endpoint status \
    --write-out json | egrep -o '"revision":[0-9]*' | egrep -o '[0-9]*')
docker exec etcd etcdctl compact "$rev"
docker exec etcd etcdctl defrag \
    --endpoints=$(docker exec etcd /bin/sh -c \
  "etcdctl member list | cut -d, -f5 | sed -e 's/ //g' | paste -sd ','")
docker exec etcd etcdctl endpoint status \
    --endpoints=$(docker exec etcd /bin/sh -c \
  "etcdctl member list | cut -d, -f5 | sed -e 's/ //g' | paste -sd ','") --write-out table