fix drop host from a zone

[darionyaphet]

No description provided.

[darionyaphet]

please wait for a minute ...

[critical27]

Ready? Generally LGTM, add some test if possible

[critical27]

Good job

[critical27]

Close #2846

[bright-starry-sky]

Good job. LGTM.

[HarrisChu]

how about a zone with only one host (no parts), could it be dropped?

[darionyaphet]

how about a zone with only one host (no parts), could it be dropped?

In my opinion, it's OK

[HarrisChu]

how about a zone with only one host (no parts), could it be dropped?

In my opinion, it's OK

it's ok for me too, just confirmation.
if it's ok, I will add more cases, e.g. add group via a zone without any hosts.

[yixinglu]

@darionyaphet please fix the format of this PR. you can use following commands to do that:

$ cd /path/to/build/directory
$ make clang-format

[darionyaphet]

@darionyaphet please fix the format of this PR. you can use following commands to do that:

$ cd /path/to/build/directory
$ make clang-format

thanks @yixinglu but it looks like there's no such command?

-- Build files have been written to: /data/darion/work/nebula/build
xargs: clang-format: No such file or directory
make[3]: *** [CMakeFiles/clang-format.dir/build.make:70: CMakeFiles/clang-format] Error 127
make[2]: *** [CMakeFiles/Makefile2:2295: CMakeFiles/clang-format.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:2302: CMakeFiles/clang-format.dir/rule] Error 2
make: *** [Makefile:264: clang-format] Error 2

By the way, only update branch will cause the format check failed?

[yixinglu]

@darionyaphet please fix the format of this PR. you can use following commands to do that:

$ cd /path/to/build/directory
$ make clang-format

thanks @yixinglu but it looks like there's no such command?

-- Build files have been written to: /data/darion/work/nebula/build
xargs: clang-format: No such file or directory
make[3]: *** [CMakeFiles/clang-format.dir/build.make:70: CMakeFiles/clang-format] Error 127
make[2]: *** [CMakeFiles/Makefile2:2295: CMakeFiles/clang-format.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:2302: CMakeFiles/clang-format.dir/rule] Error 2
make: *** [Makefile:264: clang-format] Error 2

By the way, only update branch will cause the format check failed?

Append the path /opt/vesoft/toolset/clang/10.0.0/bin to the PATH environment variable.