Apollo 星火计划踩坑记录 dreamview启动报错“No such file or directory: ‘ping‘: ‘ping‘”

第一次以计算机科学与技术本科生身份写blog也是值得纪念的

百度Apollo开源社区近期开始了“星火计划第二期”，使用了新版本的工程框架，但是毕竟还在测试中，小bug不可避免，这篇blog记录一下很多开发者们遇到的这个问题。

以下是报错内容

jingqiao@in-dev-docker:/apollo_workspace$ bash scripts/apollo_neo.sh bootstrap start
Traceback (most recent call last):File "/usr/bin/buildtool", line 216, in <module>sys.exit(main() or 0)File "/usr/bin/buildtool", line 206, in mainobj = PackageBuilder()File "/usr/bin/buildtool", line 75, in __init__self.entry_points = EntryPoints(entry_points_path, root_path, subparsers) File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/entry_point.py", line 112, in __init__self.actions[verb] = all_lib_entry_points[verb].Action()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/action/build.py", line 51, in __init__super().__init__()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/action/__init__.py", line 63, in __init__self.decider = DeciderInterface()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/version_decide/decider.py", line 139, in __init__self.metadata_cli = MetaDataCli()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/package_identification/identifier.py", line 40, in inner_instance[cls] = cls()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/version_decide/cyberfile/__init__.py", line 41, in __init__self.procedure = Procedure()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/package_identification/identifier.py", line 40, in inner_instance[cls] = cls()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/task/bazel/handler/__init__.py", line 46, in __init__self._ping_network()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/task/bazel/handler/__init__.py", line 50, in _ping_networkif subprocess.call(cmd) != 0:File "/usr/lib/python3.6/subprocess.py", line 287, in callwith Popen(*popenargs, **kwargs) as p:File "/usr/lib/python3.6/subprocess.py", line 729, in __init__restore_signals, start_new_session)File "/usr/lib/python3.6/subprocess.py", line 1364, in _execute_childraise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ping': 'ping'
[buildtool] INFO apollo build tool exit.
Traceback (most recent call last):File "/usr/bin/buildtool", line 216, in <module>sys.exit(main() or 0)File "/usr/bin/buildtool", line 206, in mainobj = PackageBuilder()File "/usr/bin/buildtool", line 75, in __init__self.entry_points = EntryPoints(entry_points_path, root_path, subparsers) File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/entry_point.py", line 112, in __init__self.actions[verb] = all_lib_entry_points[verb].Action()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/action/build.py", line 51, in __init__super().__init__()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/action/__init__.py", line 63, in __init__self.decider = DeciderInterface()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/version_decide/decider.py", line 139, in __init__self.metadata_cli = MetaDataCli()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/package_identification/identifier.py", line 40, in inner_instance[cls] = cls()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/version_decide/cyberfile/__init__.py", line 41, in __init__self.procedure = Procedure()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/package_identification/identifier.py", line 40, in inner_instance[cls] = cls()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/task/bazel/handler/__init__.py", line 46, in __init__self._ping_network()File "/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/task/bazel/handler/__init__.py", line 50, in _ping_networkif subprocess.call(cmd) != 0:File "/usr/lib/python3.6/subprocess.py", line 287, in callwith Popen(*popenargs, **kwargs) as p:File "/usr/lib/python3.6/subprocess.py", line 729, in __init__restore_signals, start_new_session)File "/usr/lib/python3.6/subprocess.py", line 1364, in _execute_childraise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ping': 'ping'
[buildtool] INFO apollo build tool exit.
[ERROR] Failed to start Dreamview. Please check dreamview.log or monitor.log for more information

分析报错信息可以发现问题出在ping上面。通过查看代码会发现核心问题在此文件中

/opt/apollo/neo/packages/buildtool-dev/1.0.0.1/core/task/bazel/handler/__init__.py

以下就是导致报错的代码

    def _ping_network(self):cmd = ["ping", "-c", "1", "baidu.com"]if subprocess.call(cmd) != 0:self.online = False

有开发者使用将 if 直接注释掉解决了这个问题，博主亲测是可以的。简单分析下这个代码，这是一段检查网络的代码，ping baidu.com以测试网络。有开发者猜测可能是网络问题，但是国内baidu不可能连不上，看下报错内容提示是没有 ping。一般docker中使用的Ubuntu都是经过裁剪的，缺胳膊少腿是正常现象，所以我猜测可能是docker环境没有安装ping导致的，于是进行以下测试

jingqiao@in-dev-docker:/apollo_workspace$ ping www.baidu.com
bash: ping: command not found

果然是没有安装ping的问题，那问题就很好解决了

sudo apt install iputils-ping

再次测试

jingqiao@in-dev-docker:/apollo_workspace$ ping www.baidu.com
PING www.a.shifen.com (39.156.66.14) 56(84) bytes of data.
64 bytes from 39.156.66.14 (39.156.66.14): icmp_seq=1 ttl=49 time=33.7 ms
64 bytes from 39.156.66.14 (39.156.66.14): icmp_seq=2 ttl=49 time=35.0 ms

jingqiao@in-dev-docker:/apollo_workspace$ bash scripts/apollo_neo.sh bootstrap
PING baidu.com (110.242.68.66) 56(84) bytes of data.
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=1 ttl=46 time=45.4 ms--- baidu.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 45.453/45.453/45.453/0.000 ms
[buildtool] INFO Reconfigure apollo enviroment setup
[buildtool] INFO Done! Please activate the apollo enviroment setup by following command:
[buildtool] INFO    source ~/.bashrc
[buildtool] INFO apollo build tool exit.
PING baidu.com (110.242.68.66) 56(84) bytes of data.
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=1 ttl=46 time=33.4 ms--- baidu.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 33.496/33.496/33.496/0.000 ms
[buildtool] INFO Reconfigure apollo enviroment setup
[buildtool] INFO Done! Please activate the apollo enviroment setup by following command:
[buildtool] INFO    source ~/.bashrc
[buildtool] INFO apollo build tool exit.
[INFO] Dreamview is running at http://localhost:8888

问题就解决了。

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Apollo 星火计划踩坑记录 dreamview启动报错“No such file or directory: ‘ping‘: ‘ping‘”

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