fix(mongodb): lower indexBuildMinAvailableDiskSpaceMB to 5 GiB

[delthas]

Summary

Lower MONGODB_INDEX_BUILD_MIN_DISK_SPACE_MB from 10000 to 5000 in solution-base/build.sh.

#2436 (ZENKO-5295) added --setParameter indexBuildMinAvailableDiskSpaceMB=10000 to config servers and shard data servers. MongoDB reads this value as MiB, so it requires 10000 * 1048576 = ~9.77 GiB of free space before it will start any index build.

That's fine on every production SKU (the smallest Mongo data volume across all installer profiles is 119Gi), but the demo / demolvm profiles provision only a 10Gi data volume (8Gi config). After ext4 overhead a fresh volume has ~9.5 GiB / ~7.5 GiB free — below the 9.77 GiB threshold — so on fresh demo/CI/AWS installs mongod refuses every createIndexes, the artesca-data-ops-vault-create-indexes job crash-loops, and the MongoDbCreateIndexesFailed alert fires.

5000 (~4.88 GiB) fits under both demo volumes while keeping meaningful headroom on all production SKUs.

Related

• feat(mongodb): set indexBuildMinAvailableDiskSpaceMB to 10 GiB #2436 / ZENKO-5295 — introduced the 10 GiB threshold
• RD-2017 — reported the symptom (CrashLoopBackOff + MongoDbCreateIndexesFailed)

Issue: ZENKO-5315

[bert-e]

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[delthas]

/create_integration_branches

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Integration data created

I have created the integration data for the additional destination branches.

• this pull request will merge bugfix/ZENKO-5315/mongo-index-build-disk-threshold into
  development/2.15
• w/2.16/bugfix/ZENKO-5315/mongo-index-build-disk-threshold will be merged into development/2.16

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• development/2.12
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• development/2.6
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[delthas]

/approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/2.15

• ✔️ development/2.16

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• development/2.10
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• hotfix/2.13.5

Please check the status of the associated issue ZENKO-5315.

Goodbye delthas.

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