[jira] [Created] (FLINK-17926) Can't build flink-web docker image because of EOL of Ubuntu:18.10

["Congxian Qiu(klion26) (Jira)" <ji...@apache.org>]

Congxian Qiu(klion26) created FLINK-17926:
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             Summary: Can't build flink-web docker image because of EOL of Ubuntu:18.10
                 Key: FLINK-17926
                 URL: https://issues.apache.org/jira/browse/FLINK-17926
             Project: Flink
          Issue Type: Bug
          Components: Project Website
            Reporter: Congxian Qiu(klion26)


Currently, the Dockerfile[1] in flink-web project is broken because of the EOL of Ubuntu 18.10[2], will encounter the error such as bellow when executing {{./run.sh}}
{code:java}
Err:3 http://security.ubuntu.com/ubuntu cosmic-security Release
  404  Not Found [IP: 91.189.88.152 80]
Ign:4 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease
Ign:5 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease
Err:6 http://archive.ubuntu.com/ubuntu cosmic Release
  404  Not Found [IP: 91.189.88.142 80]
Err:7 http://archive.ubuntu.com/ubuntu cosmic-updates Release
  404  Not Found [IP: 91.189.88.142 80]
Err:8 http://archive.ubuntu.com/ubuntu cosmic-backports Release
  404  Not Found [IP: 91.189.88.142 80]
Reading package lists...
{code}
The current LTS versions can be found in release website[2].

Apache Flink docker image uses fedora:28[3], so it unaffected.

As fedora does not have LTS release[4], I proposal to use Ubuntu for website here, and change the version from {{18.10}} to the closest LTS version {{18.04, tried locally, it works successfully.}}

 [1] [https://github.com/apache/flink-web/blob/bc66f0f0f463ab62a22e81df7d7efd301b76a6b4/docker/Dockerfile#L17]

[2] [https://wiki.ubuntu.com/Releases]

 [3]https://github.com/apache/flink/blob/e92b2bf19bdf03ad3bae906dc5fa3781aeddb3ee/docs/docker/Dockerfile#L17

 [4] https://fedoraproject.org/wiki/Fedora_Release_Life_Cycle#Maintenance_Schedule



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