In preparation for disabling idmap, inventory files on the NFS filesystem which are not currently owned by (a) root or (b) a uid that is known to be unique accross all instances because it comes from LDAP.
Plausible problematic uids are those managed by apt from a package, which vary depending on the order and set of installed packages.
Once the list of problematic files is extracted, contact project owners with the list for remediation.
Identified outliers:
project deployment-prep:
uid 48
/home/anomie/.mweval_history
/data/project/hhvm-cores/
uid 101 (probably syslog)
/data/project/deployment-salt/log/
/data//project/hhvm-cores/
uid 103 (also syslog on another system?)
/data/project/deployment-salt/log/
uid 105 (perhaps another syslog?)
/data/project/deployment-salt/log/
uid 107
/data/project/deployment-salt/log/ntpstats/
uid 111
/data/project/deployment-salt/log/diamond/project testlabs:
uid 101 (probably syslog)
/home/syslog 101project integration:
uid 103 (maybe ssl-certs?)
/home/yuvipandaproject puppet:
uid 106 (maybe ssl-certs?)
/home/faidon/certs-bck
uid 110 (mysql?)
/home/mysqlproject wdq-mm:
uid 111
/data/project/wdq
uid 112
/home/magnus/replica.my.cnfproject mobile:
uid 113 (mysql?)
/srv/project/mobile/home/backup-mysqlproject orgcharts:
uid 113
/data/project/olddb/other/project phabricator:
uid 113
/home/vcs-user 113project tools:
uid 113
/data/project/incolabot/.old/project wikidata-query:
uid 113 (mysql?)
/home/mysql
* Also, do not put a mysql database on NFSproject catgraph:
uid 114
/home/catgraph.catgraph/elasticsearch/project gerrit:
uid 114
/data/project/phabricator-elastic/elasticsearch/project mediawiki-api:
uid 114
/home/graphoid/project shinken:
uid 114
/home/testakos/project video:
uid 99
/data/project/old-cruft-deleteme/