[Nexthop][fboss2-dev] Add a "fboss2 config rollback" command. #758
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Summary: **Pre-submission checklist** - [x] I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running `pip install -r requirements-dev.txt && pre-commit install` - [x] `pre-commit run` This adds just the command `fboss2-dev config session diff`. Note: this change is part of a series, the previous one is #756, the next one is #758. Pull Request resolved: #757 Test Plan: Unit tests. ## Sample usage ``` [admin@fboss101 benoit]$ ./fboss2-dev show interface | head +-----------+--------+-------+------+------+------------------------------+----------------------------+ | Interface | Status | Speed | VLAN | MTU | Addresses | Description | -------------------------------------------------------------------------------------------------------- | eth1/1/1 | down | 800G | 2001 | 1500 | 10.0.0.0/24 | Test port for diff command | | | | | | | 2400::/64 | | | | | | | | fe80::b4db:91ff:fe95:ff07/64 | | +-----------+--------+-------+------+------+------------------------------+----------------------------+ | eth1/2/1 | down | 200G | 2003 | 9216 | 11.0.0.0/24 | Another test description | | | | | | | 2401::/64 | | | | | | | | fe80::b4db:91ff:fe95:ff07/64 | | [admin@fboss101 benoit]$ ./fboss2-dev config interface eth1/1/1 mtu 9000 Successfully set MTU for interface(s) eth1/1/1 to 9000 [admin@fboss101 benoit]$ ./fboss2-dev config interface eth1/2/1 description 'This is a test.' Successfully set description for interface(s) eth1/2/1 [admin@fboss101 benoit]$ ./fboss2-dev config session diff --- /etc/coop/agent.conf 2025-11-05 12:49:14.497415902 -0800 +++ /home/admin/.fboss2/agent.conf 2025-11-05 12:57:27.123758309 -0800 @@ -369,7 +369,7 @@ ], "isStateSyncDisabled": true, "isVirtual": false, - "mtu": 1500, + "mtu": 9000, "routerID": 0, "scope": 0, "type": 1, @@ -2230,7 +2230,7 @@ }, { "conditionalEntropyRehash": false, - "description": "Another test description", + "description": "This is a test.", "drainState": 0, "expectedLLDPValues": { "2": "eth1/6/1" ``` ``` [admin@fboss101 benoit]$ ./fboss2-dev config history Revision Owner Commit Time ------------------------------------------ r1 root 2025-11-05 13:26:58 r2 root 2025-11-05 13:27:35 r3 root 2025-11-05 13:28:13 r4 admin 2025-11-05 14:37:51 r5 admin 2025-11-05 14:38:31 ``` You can also do `fboss2-dev config diff r2 r4` or `fboss2-dev config diff r1 current` to compare committed revisions. Reviewed By: shiva-menta Differential Revision: D90277033 Pulled By: joseph5wu fbshipit-source-id: 5fcdac6c2e01c55169d68a8f5d227da241d8b65e
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Pre-submission checklist
pip install -r requirements-dev.txt && pre-commit installpre-commit runSummary
This adds just the command
fboss2-dev config rollback.Note: this change is part of a series, the previous one is #757, the next one is #759.
Test Plan
Unit tests.
Sample usage
In this state:
One can do
fboss2 config rollback r3or justfboss2 config rollbackto just go back to whatever was the last revision. Doing so creates a new revision (r6in this example) that is identical to the one we rolled back to.