Tracking task for upgrading Analytics systems to Debian Buster.
* Q4 2019/2020
[x] Matomo (probably worth to create matomo1002?) - IN PROGRESS
[x] Archiva (probably worth to create archiva1002?) - IN PROGRESS
[x] ~~Notebooks - easier after T243934, probably we are going to decom them ~~ decom tracked in T249752
[x] Druid Analytics - First Druid nodes on Buster in T252771 - IN PROGRESS
[x] Druid Public
* Q1 2020/2021
[ ] stat100[4,6,7]
[x] Kafka Jumbo - First Kafka brokers on Buster in T252675 - IN PROGRESS
[x] Event Schema hosts
[ ] kafkamon - IN PROGRESS (shared with The SRE Observability team)
* Q2 2020/2021
[ ] Hadoop (needs BigTop 1.5 deployed)
[ ] Yarn and Hue (analytics-tool1001) - This probably will need Packaging Hue for Python3, see T233073
* Q3 2020/2021
[ ] AQS
[ ] Eventlogging (we may decom the host due to T238230 before time)
[ ] Thorium - the host needs to be refreshed next FY so we can possibly couple the two things
Relevant task:
* find a partman recipe able to preserve /srv - T252027
* new ganeti nodes T228924