从vmselect查询的时候，出现如下错误：
error when executing query="up" on the time range (start=1639388706000, end=1639392306000, step=1441): cannot execute query: cannot evaluate "up": error occured during search: cannot fetch query results from vmstorage nodes: cannot perform search on vmstorage xx.145.68.171:8482: cannot obtain connection from a pool: cannot perform "vmselect" handshake with server "xx.145.68.171:8482": cannot read success response after sending hello: cannot read message with size 2: read tcp4 xx.145.69.165:38408->xx.145.68.171:8482: i/o timeout; read only 0 bytes
后来发现vmstorage启动后，有三个端口，分别是：expoter端口, 开放给vminsert的端口，开放给vmselect的端口。
see: https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#list-of-command-line-flags-for-vmstorage
-vminsertAddr string
TCP address to accept connections from vminsert services (default ":8400")
-vmselectAddr string
TCP address to accept connections from vmselect services (default ":8401")
- 配置好以上端口后，可以访问vmselect的如下位置来查询：http://xxxx:8481/select/0/vmui
- 此外：vmagent中，写入路径这里要配置为：
-remoteWrite.url "http://{{.vm_insert_addr}}/api/v1/write"