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[vog/systemlag] Voq lagid allocator #1603

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merged 3 commits into from Mar 11, 2021

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vganesan-nokia
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What I did
Defined class for lag id allocator and added lua script for allocating/freeing lag id in atomic fashion

Why I did it

For portchannels in VOQ based chassis systems we need unique lag id across
the system. The lag id (aka system port aggreggator id) is allocated during portchannel
creation. The changes are for a class for lag id allocation in atomic fashion. The LAG ID is allocated
from central chassis app db. A lua script loaded in the redis at the
time of lag id allocator instantiation ensures allocating unique lag id when
multiple clients requests for lag id simultaneously.

Ref: VOQ LAG HLD PR: sonic-net/SONiC#697

How I verified it

  • In VOQ based chassis systems, make sure chassis app db is initialized with lag id start and lag id end data in supervisor card.
  • Configure port channel in one asic instance.
  • Check the ASIC DB for system port aggregator id (spa) attribute programmed and verify that this spa value is not duplicated in portchannels from different ASICs.

Details if related

Note: This PR is dependent on sonic-swss-common PR sonic-net/sonic-swss-common#447

@anshuv-mfst
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@judyjoseph - could you please review the PR, thanks.

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vedganes added 3 commits February 10, 2021 10:51
Signed-off-by: vedganes <vedavinayagam.ganesan@nokia.com>

Class for lag id allocation in atomic fashion. The LAG ID is allocated
from central chassis app db. A lua script loaded in the redis at the
time of lag allocator instantiaion ensures allocation unqiue lag id when
multiple clients requests for lag id simultaneously. System wide unique
lag id is used for system lag in VOQ based switches.
Signed-off-by: vedganes <vedavinayagam.ganesan@nokia.com>

Changes to fix code review comments. The lua script evaluation is not
passed with keys. The keys for the required data are internally
hardcoded in the script itself.
Signed-off-by: vedganes <vedavinayagam.ganesan@nokia.com>

Typos fixed. Redundant redis set call is removed.
@vganesan-nokia
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retest this please

@vganesan-nokia
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retest vs please

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@vganesan-nokia
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retest vs please

@vganesan-nokia
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/AzurePipelines run

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Commenter does not have sufficient privileges for PR 1603 in repo Azure/sonic-swss

@judyjoseph
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/AzurePipelines run

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Azure Pipelines successfully started running 1 pipeline(s).

@judyjoseph
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retest this please

@judyjoseph
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retest vs please

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@vganesan-nokia
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retest vs please

@judyjoseph
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retest vs please

@judyjoseph
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retest this please

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LGTM

@xumia
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xumia commented Mar 4, 2021

retest vs please

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@vganesan-nokia
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retest vs please

@vganesan-nokia
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@judyjoseph, thanks for starting the Azurepipeline runs and your approval. I tried to restart the vs test. It seems "retest vs please" has not started the vs test. Would you please help to start the vs test?

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vs tests it not required anymore, Azure Pipeline run is good enough. I will merge it,

@vganesan-nokia
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vs tests it not required anymore, Azure Pipeline run is good enough. I will merge it,

o.k. thanks @judyjoseph. The system lag functionality PR (#1605) depends on this PR to build successfully.

@judyjoseph judyjoseph merged commit 1951365 into sonic-net:master Mar 11, 2021
raphaelt-nvidia pushed a commit to raphaelt-nvidia/sonic-swss that referenced this pull request Oct 5, 2021
What I did
Defined class for lag id allocator and added lua script for allocating/freeing lag id in atomic fashion

Why I did it

For portchannels in VOQ based chassis systems we need unique lag id across
the system. The lag id (aka system port aggreggator id) is allocated during portchannel
creation. The changes are for a class for lag id allocation in atomic fashion. The LAG ID is allocated
from central chassis app db. A lua script loaded in the redis at the
time of lag id allocator instantiation ensures allocating unique lag id when
multiple clients requests for lag id simultaneously.

Ref: VOQ LAG HLD PR: sonic-net/SONiC#697
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4 participants