fence_eaton_ssh: new fence agent for Eaton ePDU G3 over SSH

[SchoolGuy]

Since the Eaton SNMP fence is not feasible for the infrastructure I am responsible for, I have decided to implement this fence that will use the Eaton SSH/Serial interface.

I also took the liberty to reformat the README to 120 characters so it is easier readable when looked at in raw and to improve the Python typing experience so adding new fences is easier.

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/1/input

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/2/input

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/3/input

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/4/input

[SchoolGuy]

Missing points:

• [x] accepting the nodename instead of the plug number. - It seems that this is actually not implemented by most fences and there is no common way to do so. As such I will skip this.
• [x] set_power_status must be tested manually.
• [x] reboot_cycle must be implemented and tested.
• [x] sync_set_power must be implemented and tested.
• [x] Interactive mode
• [x] Output of fence_agent -o metadata

All other functionality is tested as described in the docstrings. An initial feeling from someone about the code would be helpful as I am getting close to completing this PR.

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/5/input

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/6/input

[SchoolGuy]

This PR is now ready for review. The new fence is tested as described in the Python docstring.

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/7/input

[oalbrigt]

Looks good. Can you run make xml-upload and add it to the PR, so CI doesnt fail?

[SchoolGuy]

@oalbrigt Done. Thanks for the quick review!

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/8/input

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/fence-agents-pipeline/job/PR-549/9/input

[oalbrigt]

Thanks.