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translating by lujun9972
check_mk error Cannot fetch deployment URL via curl error
======
Article explaining 'ERROR Cannot fetch deployment URL via curl: Couldn't resolve host. The given remote host was not resolved.' and how to resolve it.
![ERROR Cannot fetch deployment URL via curl: Couldn't resolve host. The given remote host was not resolved.][1]
check_mk is a utility which helps you configure your server to be monitored via [nagios monitoring tool][2]. While configuring one of the client I came across below error :
`ERROR Cannot fetch deployment URL via curl: Couldn't resolve host. The given remote host was not resolved.`
This error came after I tried to register client with monitoring server with below command :
```
root@kerneltalks# /usr/bin/cmk-update-agent register -s monitor.kerneltalks.com -i master -H `hostname` -p http -U omdadmin -S ASFKWEFUNSHEFKG -v
```
Here in this command -
`-s` is monitoring server
`-i` is Name of Check_MK site on that server
`-H` is Host name to fetch agent for
`-p` is protocol Either http or https (default is https)
`-U` User-ID of a user who is allowed to download the agent.
`-S` is secret. Automation secret of that user (in case of automation user)
From error you can figure out that command is not able to resolve monitoring server DNS name `monitor.kerneltalks.com`
### Solution :
Its pretty simple. Check `/etc/resolv.conf` to make sure that you have proper DNS server entry for your environment. If it still dosnt resolve issue then you can add entry in [/etc/hosts][3] for it.
```
root@kerneltalks# cat /etc/hosts
10.0.10.9 monitor.kerneltalks.com
```
Thats it. You would be able to register now successfully.
```
root@kerneltalks # /usr/bin/cmk-update-agent register -s monitor.kerneltalks.com -i master -H `hostname` -p http -U omdadmin -S ASFKWEFUNSHEFKG -v
Going to register agent at deployment server
Successfully registered agent for deployment.
You can now update your agent by running 'cmk-update-agent -v'
Saved your registration settings to /etc/cmk-update-agent.state.
```
By the way you can directly use IP address for `-s` switch and get rid of all above jargon including error itself!
--------------------------------------------------------------------------------
via: https://kerneltalks.com/troubleshooting/check_mk-register-cannot-fetch-deployment-url-via-curl-error/
作者：[kerneltalks][a]
译者：[lujun9972](https://github.com/lujun9972)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:https://kerneltalks.com
[1]:https://c4.kerneltalks.com/wp-content/uploads/2017/10/resolve-check_mk-error.png
[2]:https://www.nagios.org/
[3]:https://kerneltalks.com/linux/understanding-etc-hosts-file/

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如何解决 check_mk 出现 "Cannot fetch deployment URL via curl" 的错误
======
本文解释了 'ERROR Cannot fetch deployment URL via curl：Couldn't resolve host。The given remote host was not resolved。' 的原因及其解决方案。
![ERROR Cannot fetch deployment URL via curl：Couldn't resolve host。The given remote host was not resolved。][1]
check_mk 是一个帮你配置 [nagios][2] 监控服务器的工具。然后在配置其中一台机器时，我遇到了下面的错误：
`ERROR Cannot fetch deployment URL via curl：Couldn't resolve host。The given remote host was not resolved。`
该错误是在我使用下面命令尝试将该机器注册到监控服务器时发生的：
```
root@kerneltalks# /usr/bin/cmk-update-agent register -s monitor.kerneltalks.com -i master -H `hostname` -p http -U omdadmin -S ASFKWEFUNSHEFKG -v
```
其中-
`-s` 指明监控服务器
`-i` 指定服务器上 Check_MK 站点的名称
`-H` 指定 agent 所在的主机名
`-p` 为协议，可以是 http 或 https (默认为 https)
`-U` 允许下载 agent 的用户 ID
`-S` 为密码。用户的自动操作密码(当是自动用户时)
从错误中可以看出，命令无法解析监控服务器的 DNS 名称 `monitor.kerneltalks.com`
### 解决方案：
超级简单。检查 `/etc/resolv.conf`，确保你的 DNS 配置正确。如果还解决不了这个问题那么你可以直接在 [/etc/hosts][3] 中指明它的 IP。
```
root@kerneltalks# cat /etc/hosts
10.0.10.9 monitor.kerneltalks.com
```
这就搞定了。你可能成功注册了。
```
root@kerneltalks # /usr/bin/cmk-update-agent register -s monitor.kerneltalks.com -i master -H `hostname` -p http -U omdadmin -S ASFKWEFUNSHEFKG -v
Going to register agent at deployment server
Successfully registered agent for deployment.
You can now update your agent by running 'cmk-update-agent -v'
Saved your registration settings to /etc/cmk-update-agent.state.
```
另外，你也可以为 `-s` 直接指定 IP 地址，就没那么多事了！
--------------------------------------------------------------------------------
via: https://kerneltalks.com/troubleshooting/check_mk-register-cannot-fetch-deployment-url-via-curl-error/
作者：[kerneltalks][a]
译者：[lujun9972](https://github.com/lujun9972)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:https://kerneltalks.com
[1]:https://c4.kerneltalks.com/wp-content/uploads/2017/10/resolve-check_mk-error.png
[2]:https://www.nagios.org/
[3]:https://kerneltalks.com/linux/understanding-etc-hosts-file/