Discovery/Status updates/2019-03-11

This is the weekly update for the week starting 2019-03-11

Search

 * As part of the ElasticSearch v6 upgrade:
 * uploaded ElasticSearch 6.5.4 packages to reprepro
 * Adapted the ElasticSearch puppet module
 * Tested that we can run multiple ElasticSearch clusters on same hardware
 * We discovered that the Maven Wrapper does not support XDG_CACHE_HOME, so we updated java8: to actually use the new image; fixing the mvn wrapper cache issue
 * Upon unpacking the Greek analysis chain, we found that the filter isn't properly handling language-specific lowercasing in language analyzers; fixed it by adding Greek empty-token filter and keep lang-specific lowercasing
 * As part of the lang-specific lowercasing, we also upgraded the ICU normalization (more info)
 * We decided we should use a better/cleaner approach for icinga elasticsearch check and merged http and https elasticsearch icinga checks into one
 * We also updated the alerts for mjolnir daemons, so we can tell when it starts misbehaving

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