Issue Summary
This is reproducible on Data Center: 
When creating a Subversion repository in Bamboo, it fails with svn: E210002: There was a problem while connecting to svnserver:22 when using svn+ssh:// in the URL.
Older Key Exchange algorithms are already deprecated or not supported by later versions of OpenSSH (see this page for a better explanation). The svnkit library version used by Bamboo uses deprecated KEX and fails to connect to later versions of the SSH service.
Steps to Reproduce
- Set a Subversion server over SSH
- Configure a Subversion repository and use a svn+ssh://svnserver/path/to/repo as the Repository root URL
- Click on the test button
Expected Results
The test should succeed
Actual Results
The test fails on the UI:
svn: E210002: There was a problem while connecting to svnserver:22
And in the Bamboo logs:
2022-09-23 20:17:25,172 INFO [https-jsse-nio-45900-exec-11 url: /rest/api/latest/repository/testConnection; user: ealvarenga] [RepositoryResource] Failed to connect to repository (type: Subversion, location: svn+ssh:
When enabling svnkit logs we can also observe:
Sep 23, 2022 8:17:25 PM org.tmatesoft.svn.core.internal.util.DefaultSVNDebugLogger log
FINE: NETWORK: svn: E210002: There was a problem while connecting to svnserver:22
And on the SSHD server:
Unable to negotiate with 10.0.9.13 port 33622: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 [preauth]
Workarounds
- Allow old KEX on the SSHD service running the Subversion server. Add the following option to /etc/ssh/sshd_config or equivalent file:
- Configure your Subversion service to serve contents through HTTP/HTTPS or pure SVN protocols and set them on the repository configuration on Bamboo.
Bug
High
