====== Munin ======


===== Installation de l'agent Munin =====

  * Installation du paquet debian : <code>apt-get install munin-node</code>
  * On autorise les connexions du serveur centrale en ajoutant dans le fichier */etc/munin/munin-node.conf* : <code>allow ^AAA\.BBB\.CCC\.DDD$</code>
  * Puis on relance le service : <code>service munin-node restart</code>

===== Détection des plugins appropriés pour un système =====

Il existe une commande fort utile pour cela : <code>munin-node-configure --suggest</code>

Le résultat de cette commande affiche notamment les dépendances manquantes pour que les plugins appropriés soit pleinement utilisables. Une fois les dépendances satisfaites, il peut être utile de lancer manuellement le plugin pour vérifier que le résultat des indicateurs correspond à la réalité du serveur.

<note>L'argument //--shell// permet de sortir directement les commandes //ln -s ~~~// à lancer pour "activer" l'utilisation des plugins suggérés.</note>
===== Mise en place des graphs =====

==== Mise en place du plugin munin pour Apache ====

<code>apt-get install liblwp-useragent-determined-perl

ln -s '/usr/share/munin/plugins/apache_accesses' '/etc/munin/plugins/apache_accesses'
ln -s '/usr/share/munin/plugins/apache_processes' '/etc/munin/plugins/apache_processes'
ln -s '/usr/share/munin/plugins/apache_volume' '/etc/munin/plugins/apache_volume'

service munin-node restart</code>

==== Mise en place du plugin pour MySQL ====

<code>apt-get install libcache-cache-perl

ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_bin_relay_log'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_commands'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_connections'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_files_tables'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_bpool'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_bpool_act'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_insert_buf'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_io'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_io_pend'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_log'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_rows'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_semaphores'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_innodb_tnx'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_myisam_indexes'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_network_traffic'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_qcache'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_qcache_mem'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_replication'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_select_types'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_slow'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_sorts'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_table_locks'
ln -s '/usr/share/munin/plugins/mysql_' '/etc/munin/plugins/mysql_tmp_tables'

service munin-node restart</code>

==== Mise en place du plugin munin pour PostgreSQL ====

<code>apt-get install libdbd-pg-perl

ln -s '/usr/share/munin/plugins/postgres_autovacuum' '/etc/munin/plugins/postgres_autovacuum'
ln -s '/usr/share/munin/plugins/postgres_bgwriter' '/etc/munin/plugins/postgres_bgwriter'
ln -s '/usr/share/munin/plugins/postgres_cache_' '/etc/munin/plugins/postgres_cache_ALL'
ln -s '/usr/share/munin/plugins/postgres_cache_' '/etc/munin/plugins/postgres_cache_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_cache_' '/etc/munin/plugins/postgres_cache_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_checkpoints' '/etc/munin/plugins/postgres_checkpoints'
ln -s '/usr/share/munin/plugins/postgres_connections_' '/etc/munin/plugins/postgres_connections_ALL'
ln -s '/usr/share/munin/plugins/postgres_connections_' '/etc/munin/plugins/postgres_connections_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_connections_' '/etc/munin/plugins/postgres_connections_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_connections_db' '/etc/munin/plugins/postgres_connections_db'
ln -s '/usr/share/munin/plugins/postgres_locks_' '/etc/munin/plugins/postgres_locks_ALL'
ln -s '/usr/share/munin/plugins/postgres_locks_' '/etc/munin/plugins/postgres_locks_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_locks_' '/etc/munin/plugins/postgres_locks_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_querylength_' '/etc/munin/plugins/postgres_querylength_ALL'
ln -s '/usr/share/munin/plugins/postgres_querylength_' '/etc/munin/plugins/postgres_querylength_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_querylength_' '/etc/munin/plugins/postgres_querylength_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_scans_' '/etc/munin/plugins/postgres_scans_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_scans_' '/etc/munin/plugins/postgres_scans_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_size_' '/etc/munin/plugins/postgres_size_ALL'
ln -s '/usr/share/munin/plugins/postgres_size_' '/etc/munin/plugins/postgres_size_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_size_' '/etc/munin/plugins/postgres_size_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_transactions_' '/etc/munin/plugins/postgres_transactions_ALL'
ln -s '/usr/share/munin/plugins/postgres_transactions_' '/etc/munin/plugins/postgres_transactions_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_transactions_' '/etc/munin/plugins/postgres_transactions_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_tuples_' '/etc/munin/plugins/postgres_tuples_ckan_default'
ln -s '/usr/share/munin/plugins/postgres_tuples_' '/etc/munin/plugins/postgres_tuples_datastore_default'
ln -s '/usr/share/munin/plugins/postgres_users' '/etc/munin/plugins/postgres_users'
ln -s '/usr/share/munin/plugins/postgres_xlog' '/etc/munin/plugins/postgres_xlog'

service munin-node restart</code>

==== Mise en place du plugin munin pour MongoDB ====

<code>git clone https://github.com/erh/mongo-munin /usr/local/src/mongo-munin
ln -s /usr/local/src/mongo-munin/mongo_* /etc/munin/plugins/
service munin-node restart</code>