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Upgrade eqiad data centre to Elasticsearch 2.3
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Description

We need to upgrade both of our data centres to Elasticsearch 2.3. This task tracks the work to upgrade eqiad.

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This should be completed on Monday, June 6th

Change 292541 had a related patch set uploaded (by Gehel):
Update configuration for elasticsearch 2.3 upgrade on eqiad

https://gerrit.wikimedia.org/r/292541

Mentioned in SAL [2016-06-03T10:39:30Z] <gehel> Starting upgrade of elasticsearch eqiad cluster to 2.3 (T133126)

Change 292541 merged by Gehel:
Update configuration for elasticsearch 2.3 upgrade on eqiad

https://gerrit.wikimedia.org/r/292541

Mentioned in SAL [2016-06-03T10:48:15Z] <gehel> taking elasticsearch eqiad cluster down for upgrade to 2.3 (T133126)

Mentioned in SAL [2016-06-03T11:18:30Z] <gehel> freezing writes from CirrusSearch to eqiad clsuter during upgrade (T133126)

Mentioned in SAL [2016-06-03T14:38:22Z] <gehel> un-freezing writes from CirrusSearch to eqiad cluster during upgrade (T133126)