使用Tiup缩容tikv节点时，会连接外网导致失败

[83177752]

v4版本，使用Tiup缩容tikv节点时，会连接外网导致失败

2020-06-18T08:41:35.841+0800 INFO Execute command finished {"code": 1, "error": "init config failed: 192.101.11.238:4000: fetch /timestamp.json from mirror(https://tiup-mirrors.pingcap.com/) failed: download from https://tiup-mirrors.pingcap.com/timestamp.json failed: Get https://tiup-mirrors.pingcap.com/timestamp.json: dial tcp: lookup tiup-mirrors.pingcap.com on [::1]:53: read udp [::1]:53941->[::1]:53: read: connection refused", "errorVerbose": "Get https://tiup-mirrors.pingcap.com/timestamp.json: dial tcp: lookup tiup-mirrors.pingcap.com on [::1]:53: read udp [::1]:53941->[::1]:53: read: connection refused\ndownload from https://tiup-mirrors.pingcap.com/timestamp.json failed\ngithub.com/pingcap/tiup/pkg/repository.(*httpMirror).download\n\tgithub.com/pingcap/tiup@/pkg/repository/mirror.go:219\ngithub.com/pingcap/tiup/pkg/repository.(*httpMirror).Fetch\n\tgithub.com/pingcap/tiup@/pkg/repository/mirror.go:256\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).fetchBase\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:527\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).fetchManifest\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:504\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).fetchTimestamp\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:462\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).updateLocalSnapshot\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:234\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).ensureManifests\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:180\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).FetchComponentManifest\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:624\ngithub.com/pingcap/tiup/pkg/repository.(*V1Repository).ComponentVersion\n\tgithub.com/pingcap/tiup@/pkg/repository/v1_repository.go:634\ngithub.com/pingcap/tiup/pkg/cluster/clusterutil.(*repositoryT).ComponentBinEntry\n\tgithub.com/pingcap/tiup@/pkg/cluster/clusterutil/cluster.go:91\ngithub.com/pingcap/tiup/pkg/cluster/meta.checkConfig\n\tgithub.com/pingcap/tiup@/pkg/cluster/meta/server_config.go:164\ngithub.com/pingcap/tiup/pkg/cluster/meta.(*TiDBInstance).InitConfig\n\tgithub.com/pingcap/tiup@/pkg/cluster/meta/logic.go:438\ngithub.com/pingcap/tiup/pkg/cluster/task.(*InitConfig).Execute\n\tgithub.com/pingcap/tiup@/pkg/cluster/task/init_config.go:46\ngithub.com/pingcap/tiup/pkg/cluster/task.(*Serial).Execute\n\tgithub.com/pingcap/tiup@/pkg/cluster/task/task.go:183\ngithub.com/pingcap/tiup/pkg/cluster/task.(*Parallel).Execute.func1\n\tgithub.com/pingcap/tiup@/pkg/cluster/task/task.go:236\nruntime.goexit\n\truntime/asm_amd64.s:1357\nfetch /timestamp.json from mirror(https://tiup-mirrors.pingcap.com/) failed\ninit config failed: 192.101.11.238:4000"}

其实timestamp.json文件存在/home/tidb/tidb-community-server-v4.0.0-linux-amd64下
后来通过export TIUP_MIRRORS=/home/tidb/tidb-community-server-v4.0.0-linux-amd64
再次执行即可

这块希望把bug修复掉 不通过export就可以执行，官网文档就是直接运行

[g1eny0ung]

/label component/tools

[lucklove]

Hi~ what's the tiup version you use?
We have introduce the command tiup mirror set in tiup v1.0.9, you can execute tiup mirror set /home/tidb/tidb-community-server-v4.0.0-linux-amd64 to replace the official mirror and after that you don't need to set the TIUP_MIRRORS again. (to use tiup mirror set, make sure that TIUP_MIRRORS is disabled)
And you can execute the command tiup mirror set https://tiup-mirrors.pingcap.com to set the official mirror if you want in the future.