[[PageOutline]]

= ems04.mpi.nl =

Hoster: [[../../Hosters/MPI-PL]] 

# Maintenance #

## Responsibility ##

[[mailto:"Sander Maijers" <sander@clarin.eu>]]

## Tickets ##

[[TicketQuery(col=ticket|priority|summary|owner|created|modified,keywords=~ems04.mpi.nl&component=System administration&report=28&order=priority,max=10,table)]]

# Filesystem #

## Special directory tree structures ##

### `/srv/` ###
|| `cronjobs_state/` || contains logs of cron job output ||
|| `apps/` || custom compiled and/or installed software ||
|| `dumps_for_backup/` and `backup/` || directories that are filled by the nbackup cronjob ||
|| `mysql/` || `var/lib/mysql/` contents ||
|| `LDAP/` || LDAP server installation and data ||
|| `www/` || contains Apache document roots ||
|| `trac/` || contains some Trac data and configuration. Trac is installed in `/srv/Python/venvs/`, however, and most of its data is in a PostgreSQL database. ||

{{{
/srv/
├── [drwxr-xr-x root     root    ]  apps
│   ├── [drwxr-xr-x root     root    ]  installations
│   └── [drwxr-xr-x root     root    ]  installers
├── [lrwxrwxrwx root     root    ]  backup -> /mnt/backup
├── [drwxr-xr-x root     root    ]  cronjobs_state
│   ├── [drwsr-sr-x root     root    ]  1
│   ├── [drwsr-sr-x root     root    ]  10
│   ├── [drwsr-sr-x root     root    ]  11
│   ├── [drwsr-sr-x www-data www-data]  12
│   ├── [drwsr-sr-x www-data www-data]  13
│   ├── [drwsr-sr-x www-data www-data]  14
│   ├── [drwsr-sr-x www-data www-data]  15
│   ├── [drwsr-sr-x root     root    ]  16
│   ├── [drwsr-sr-x www-data www-data]  17
│   ├── [drwsr-sr-x www-data www-data]  18
│   ├── [drwsr-sr-x www-data www-data]  19
│   ├── [drwsr-sr-x www-data www-data]  2
│   ├── [drwsr-sr-x root     root    ]  3
│   ├── [drwsr-sr-x root     root    ]  4
│   ├── [drwsr-sr-x root     root    ]  5
│   ├── [drwsr-sr-x root     root    ]  6
│   ├── [drwsr-sr-x root     root    ]  7
│   ├── [drwsr-sr-x root     root    ]  8
│   └── [drwsr-sr-x root     root    ]  9
├── [lrwxrwxrwx root     root    ]  dumps_for_backup -> /mnt/development/dumps_for_backup/
├── [drwx--x--x opendj   opendj  ]  LDAP
│   ├── [drwxrwx--x opendj   opendj  ]  backup
│   ├── [drwx------ opendj   opendj  ]  OpenDJ-2.5.0-Xpress1
│   └── [drwx------ opendj   opendj  ]  opendj-2.6.2
├── [drwx------ root     root    ]  lost+found
├── [drwx------ mysql    mysql   ]  mysql
│   ├── [drwx------ mysql    mysql   ]  drupal
│   ├── [drwx------ mysql    mysql   ]  mysql
│   ├── [drwx------ mysql    mysql   ]  performance_schema
│   ├── [drwx------ mysql    mysql   ]  piwik_db
│   └── [drwx------ mysql    mysql   ]  test
├── [drwxr-xr-x python   python  ]  Python
│   └── [drwxr-xr-x python   python  ]  venvs
├── [drwxr-sr-x root     root    ]  scripts
│   ├── [drwxr-sr-x root     root    ]  exec
│   ├── [drwxr-sr-x root     root    ]  input
│   └── [drwxr-sr-x root     root    ]  output
├── [lrwxrwxrwx subversi www-data]  subversion -> /mnt/development/subversion/
├── [drwsr-sr-x trac     www-data]  trac
│   ├── [drwxrws--x trac     www-data]  trac.clarin.eu
│   └── [drwxrws--x trac     www-data]  trac.clarin.nl
└── [drwxr-xr-x www-data www-data]  www
    ├── [drwsr-sr-x www-data www-data]  drupal6
    ├── [drwxrwsr-x www-data www-data]  infra.clarin.eu
    ├── [drwsr-sr-x www-data www-data]  maintenance
    ├── [drwxr-xr-x www-data www-data]  piwik
    └── [drwsr-sr-x www-data www-data]  unknown_vhost
}}}

## Backup policy ##

An internal backup program, nbackup, backs up a lot of directories (daily, rotated weekly), esp. under `/srv/`. 
For more details, see scheduled job named 'cronjob 6: nbackup' in the relevant section. 
The nightly backups are stored in `/srv/backup/a/`.
'''They must be manually moved from this directory to [[clarinvm.ics.muni.cz]].'''

# Required connectivity (firewall) #

## Current status ##

### External firewalls ###

None.

### Internal firewall ###

See `/etc/shorewall/rules`.

# Scheduled jobs #

There are numerous important crontobs running under uids for `root` and `www-data`.
A utility called `cronjobber` manages this and stores cron job output/state under `/srv/cronjobs_state/`.
Issue e.g. `sudo -u www-data crontab -e` to view the current crontab.