[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot #2286

arfeigin · 2022-08-01T12:10:06Z

This PR should be merged together with the sonic-sairedis PR (sonic-net/sonic-sairedis#1100) and sonic-buildimage PR (sonic-net/sonic-buildimage#11594).

What I did

Improve fast-reboot flow.

How I did it

Using warm-reboot infrastructure.
Clear all routes except of default routes for faster reconciliation time.

How to verify it

Community fast-reboot test, manual testing.

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

vaibhavhd · 2022-08-04T18:24:01Z

Why is this PR in draft mode? Is this not complete?

vaibhavhd · 2022-08-04T18:45:40Z

scripts/fast-reboot

+    # Clear all routes except of default routes for faster reconciliation time.
+    sonic-db-cli APPL_DB eval "
+        for _, k in ipairs(redis.call('keys', '*')) do
+            if string.match(k, 'ROUTE_TABLE:') and not string.match(k, 'ROUTE_TABLE:0.0.0.0/0') and not string.match(k, 'ROUTE_TABLE:::/0') then \


How does this improve reconciliation time? Is that due to less routes to reconcile?

Why do we need this for fast-reboot, if this is not done for warm-reboot?

In fast-reboot case, does this mean we will have dataplane impact much sooner than the time when ASIC reset happens?

It is the same as the previous implementation of "Fast-Reboot", we save only the default routes.

I might be missing something, can you please point me to the present logic for save only the default routes in fast-reboot case?

Saving of default routes was done by the fast-reboot-dump script other than that it was saving also ARP and FDB tables. It was being saved to /host/fast-reboot/default_routes.json

The new suggested approach was tested side-by-side with the previous approach of dumping the arp/fdb/default_routes to json files and reloading them. This single change improves dataplane downtime by more than a second by itself.

Reverted this change, will use the current implementation of using fast-reboot-dump and filter_fdb_entries scripts.

I inspected the last change made - reintroducing the use of fast-reboot-dump and filder_fdb_entries and the implications it had on fast-reboot performance and I wanted to rest you assured that it is not needed.

The change of having fast-reboot over warm-reboot infrastructure introduces the call to backup_database which wasn't used previously for fast-reboot. This function backups FDB_TABLE and APP_DB is being dumped as well to dump.rdb so also media settings are being stored and alongside with ARPs. This is being restored in the change made in the sonic-buildimage PR which should be merged together. In this case the issue https://github.com/sonic-net/sonic-buildimage/issues/9165 won't reproduce.

The main change that the relevant data will be restored in a similar way to as it is being restored in warm-reboot scenario and not using fdb.json; arp.json; default_routes.json; media_config.json files.

If we will call backup_database function without deleting all routes except default routes will result in storing and then restoring all the routes after reset. This will affect dataplane downtime as the amount of routes increases and this is not a desired behavior.

The specific implementation wasn't explicitly described in the HLD but the use of warm-reboot infrastructure i.e. use backup_database and dump.rdb is the cause for this change as the current logic of storing arp/fdb/default_routes and media settings is not changed.

I didn't read in detail. but the explanation sound reasonable to me.

@tjchadaga can you please check this PR to ensure sonic-net/sonic-buildimage#9165 will not be seen again after this new design change gets merged?

@vaibhavhd - based on the design of backup and restore of app db using dump.rdb, i think media settings should be restored on time to avoid sonic-net/sonic-buildimage#9165

scripts/fast-reboot

arfeigin · 2022-08-11T10:30:33Z

/easycla

linux-foundation-easycla · 2022-08-11T10:30:36Z

The committers listed above are authorized under a signed CLA.

✅ login: arfeigin / name: Aryeh Feigin (5271e5a)

scripts/fast-reboot

Junchao-Mellanox · 2022-08-31T05:51:42Z

scripts/fast-reboot

        sonic-db-cli STATE_DB SET "FAST_REBOOT|system" "1" "EX" "180" &>/dev/null
+        config warm_restart enable system


For people who does not know the background, it is really confuse here, I would suggest to add comment here to explain why fastboot requires "enable warmboot".

Agree, it confused me.

scripts/fast-reboot

This reverts commit 5154f42.

arfeigin · 2022-09-08T10:21:53Z

/azpw run Azure.sonic-utilities

mssonicbld · 2022-09-08T10:21:54Z

/AzurePipelines run Azure.sonic-utilities

azure-pipelines · 2022-09-08T10:22:04Z

Azure Pipelines successfully started running 1 pipeline(s).

qiluo-msft · 2022-09-11T17:11:59Z

@vaibhavhd Could you help review?

vaibhavhd · 2022-09-12T16:38:50Z

scripts/fast-reboot

@@ -659,6 +631,15 @@ if [[ "$REBOOT_TYPE" = "fast-reboot" ]]; then
        unload_kernel
        exit "${EXIT_COUNTERPOLL_DELAY_FAILURE}"
    fi
+
+    # Clear all routes except of default routes for faster reconciliation time.


Since this is a delete call (cannot recover from here), shouldn't this step be executed after set +e ?

Good catch! modified.

will update also in #2365 (PR for 202205)

This PR is similar to #2286 This PR should be merged together with the sonic-sairedis PR (sonic-net/sonic-sairedis#1121) and sonic-buildimage PR (sonic-net/sonic-buildimage#12026). Improve fast-reboot flow by using warm-reboot infrastructure. Clear all routes except of default routes for faster reconciliation time. Verified by community fast-reboot test, manual testing.

qiluo-msft · 2022-09-18T17:54:50Z

Feel free to merge this PR. bandit checker is optional.

Update sonic-utilities submodule pointer to include the following: * 0a7557b [minigraph] add option to specify golden path in load_minigraph ([sonic-net#2350](sonic-net/sonic-utilities#2350)) * 322aefc [GCU]Remove GCU unique lane check for duplicate lanes platforms ([sonic-net#2343](sonic-net/sonic-utilities#2343)) * 7099fff [fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot ([sonic-net#2286](sonic-net/sonic-utilities#2286)) * 09026ed [warm-reboot] fix warm-reboot when /tmp/cache is missing ([sonic-net#2367](sonic-net/sonic-utilities#2367)) * a3c404c Fix typo in platform_sfputil_helper.is_rj45_port ([sonic-net#2374](sonic-net/sonic-utilities#2374)) * 637d834 Vnet_route_check Vxlan tunnel route update. ([sonic-net#2281](sonic-net/sonic-utilities#2281)) * 29a3e51 Added support for tunnel route status in show vnet routes all. ([sonic-net#2341](sonic-net/sonic-utilities#2341)) * 1ac584b Use 'default' VRF when VRF name is not provided ([sonic-net#2368](sonic-net/sonic-utilities#2368)) * 4d377a6 [subinterface]Added additional checks in portchannel and subinterface commands ([sonic-net#2345](sonic-net/sonic-utilities#2345)) * bbcdf2e disk_check: Publish event for RO state ([sonic-net#2320](sonic-net/sonic-utilities#2320)) * 3fd537b Support the bandit check by GitHub Action ([sonic-net#2358](sonic-net/sonic-utilities#2358)) * 491d3d3 [generate dump]Added error message when saisdkdump fails ([sonic-net#2356](sonic-net/sonic-utilities#2356)) * 6830e01 [counterpoll]Fixing counterpoll show for tunnel and acl stats ([sonic-net#2355](sonic-net/sonic-utilities#2355)) * 3be2ad7 [fast-reboot]Avoid stopping masked services during fast-reboot ([sonic-net#2335](sonic-net/sonic-utilities#2335)) * 0e1b0cf [GCU] Fix missing backend in dry run ([sonic-net#2347](sonic-net/sonic-utilities#2347)) * 676c31b Add verification for override ([sonic-net#2305](sonic-net/sonic-utilities#2305)) * 48997c2 Add Password Hardening CLI support ([sonic-net#2338](sonic-net/sonic-utilities#2338)) * 414e239 update unit tests for swap ([#locato](https://github.com/sonic-net/sonic-utilities/pull/locato)) * a91a492 consider swap checking memory in ([#stalle](https://github.com/sonic-net/sonic-utilities/pull/stalle)) * f0ce586 [route_check]: Ignore standalone tunnel routes ([sonic-net#2325](sonic-net/sonic-utilities#2325)) Signed-off-by: dprital <[email protected]>

This PR should be merged together with the sonic-utilities PR (sonic-net/sonic-utilities#2286) and sonic-sairedis PR (sonic-net/sonic-sairedis#1100). Use redis contents from dump file in fast-reboot. Improve fast-reboot flow by utilizing the warm-reboot infrastructure. This followes https://github.com/sonic-net/SONiC/blob/master/doc/fast-reboot/Fast-reboot_Flow_Improvements_HLD.md

…t-boot (sonic-net#2286) This PR should be merged together with the sonic-sairedis PR (sonic-net/sonic-sairedis#1100) and sonic-buildimage PR (sonic-net/sonic-buildimage#11594). This is done to improve fast-reboot flow by: Using warm-reboot infrastructure. Clear all routes except of default routes for faster reconciliation time.

…691) **Depends on:** - sonic-net/sonic-sairedis#1100 - sonic-net/sonic-utilities#2286 - sonic-net/sonic-buildimage#11594 **Why I did this?** Daemons which are not related to warm/fast restart might affect the performance of warm/fast restart. A hardcoded start up delay is the current solution to avoid this. This PR implements a function to wait warm/fast restart done. This function provided a efficiency and graceful way for daemons to wait warm/fast restart done. **How I did it?** Implement a utility function RestartWaiter::waitRestartDone. This function waits warm restart done flag in STATE DB and return true if the flag is set by warm restart finalizer. This function is also exposed as python extension so that python daemons can utilize it. This PR depends on new fastboot design: https://github.com/sonic-net/SONiC/blob/master/doc/fast-reboot/Fast-reboot_Flow_Improvements_HLD.md

…t-boot (sonic-net#2286) This PR should be merged together with the sonic-sairedis PR (sonic-net/sonic-sairedis#1100) and sonic-buildimage PR (sonic-net/sonic-buildimage#11594). This is done to improve fast-reboot flow by: Using warm-reboot infrastructure. Clear all routes except of default routes for faster reconciliation time.

Use warm-boot infrastructure for fast-boot

5271e5a

arfeigin changed the title ~~Use warm-boot infrastructure for fast-boot~~ [fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot Aug 1, 2022

vaibhavhd reviewed Aug 4, 2022

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liat-grozovik mentioned this pull request Aug 9, 2022

Fast-reboot Flow Improvements HLD sonic-net/SONiC#980

Merged

remove redundant condition check

83770a5

arfeigin marked this pull request as ready for review August 16, 2022 13:07

This was referenced Aug 17, 2022

[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot sonic-net/sonic-buildimage#11594

Merged

[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot sonic-net/sonic-sairedis#1100

Merged

dprital added the Request for 202205 Branch label Aug 24, 2022

revert change - dump arp and fdb for reconciliation

5154f42

Junchao-Mellanox reviewed Aug 31, 2022

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Revert "revert change - dump arp and fdb for reconciliation"

e1cc628

This reverts commit 5154f42.

stepanblyschak previously approved these changes Sep 8, 2022

View reviewed changes

This was referenced Sep 8, 2022

[202205] Use warm-boot infrastructure for fast-boot sonic-net/sonic-buildimage#12026

Merged

[202205] Use warm-boot infrastructure for fast-boot #2365

Merged

vaibhavhd reviewed Sep 12, 2022

View reviewed changes

Delete routes only after we are committed to reboot

b5f4629

arfeigin dismissed stepanblyschak’s stale review via b5f4629 September 12, 2022 19:34

vaibhavhd approved these changes Sep 12, 2022

View reviewed changes

Junchao-Mellanox mentioned this pull request Sep 19, 2022

[Fast/Warm restart] Implement helper class for waiting restart done sonic-net/sonic-swss-common#691

Merged

dprital removed the Request for 202205 Branch label Sep 19, 2022

vaibhavhd merged commit 7099fff into sonic-net:master Sep 20, 2022

dprital mentioned this pull request Sep 21, 2022

[submodule] Advance sonic-utilities pointer sonic-net/sonic-buildimage#12146

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[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot #2286

[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot #2286

arfeigin commented Aug 1, 2022 •

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qiluo-msft commented Sep 18, 2022

		sonic-db-cli STATE_DB SET "FAST_REBOOT\|system" "1" "EX" "180" &>/dev/null
		config warm_restart enable system

[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot #2286

[fastboot] fastboot enhancement: Use warm-boot infrastructure for fast-boot #2286

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arfeigin commented Aug 1, 2022 • edited Loading

What I did

How I did it

How to verify it

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

vaibhavhd commented Aug 4, 2022

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arfeigin commented Aug 11, 2022

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