[config reload]: On dual ToR systems, cache ARP and FDB tables #1465
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Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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| # If we are able to successfully cache ARP table info, signal SWSS to restore from our cache | ||
| # by creating /host/config-reload/needs-restore | ||
| if success: |
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is this required? in a similar way, swss can check if the (arp.json and fdb.json) file exists and restore, correct?
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SWSS checks for file existence, but also checks /proc/cmdline to make sure fast-reboot actually occurred. I wanted to have a similar check for config reload for redundancy.
This was referenced Feb 26, 2021
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Use the fast-reboot-dump and filter_fdb_entries scripts to cache the current ARP and FDB tables in /host/config-reload. Also create a file in the same directory to indicate to SWSS that it should restore from the cache. Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
This was referenced Apr 27, 2022
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Fix the path to config_db.json in config-reload for dual-tor device. Presently, there exists a typo in config_db.json filename that is sent as an argument to filter_fdb_entries. This causes failure during config reload. Related PR: #1465
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sonic-net#1465)" This reverts commit 10de91d. Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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sonic-net#1465)" This reverts commit 10de91d. Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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sonic-net#1465)" This reverts commit 10de91d. Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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sonic-net#1465)" This reverts commit 10de91d. Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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sonic-net#2460) …s (sonic-net#1465)" - This reverts commit 10de91d. - Also removes '--disable-arp-cache' option from config reload tests that was added in sonic-net#2325 Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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sonic-net#2460) …s (sonic-net#1465)" - This reverts commit 10de91d. - Also removes '--disable-arp-cache' option from config reload tests that was added in sonic-net#2325 Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
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Signed-off-by: Lawrence Lee lawlee@microsoft.com
What I did
On dual ToR systems, before performing
config reloadcache the ARP and FDB tables (similar to fast reboot) so that the standby ToR is able to resume normal operation afterwards.Note: will require a separate change in sonic-buildimage for the
docker_image_ctl.j2file for the SWSS containerHow I did it
Add an optional flag to disable caching behavior (enabled by default for dual ToR systems, disabled for all others).
Use the
fast-reboot-dumpandfilter_fdb_entriesscripts to cache the current ARP and FDB tables in/host/config-reload. Also create a file in the same directory to indicate to SWSS that it should restore from the cache.How to verify it
config reload -don a dual ToR system. Confirm that no cache is created in/host/config-reload.config reloadon a dual ToR system. Confirm a cache IS created in/host/config-reload. There should be anarp.json,fdb.json, anddefault_routes.json(this one will be unused)config reloadandconfig reload -don a dual ToR system. Confirm that no cache is created in/host/config-reload.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)