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Mehdi Abaakouk, 21/07/2016 11:25
- Contenu
- Management Cluster Ceph
Management Cluster Ceph¶
Liens¶
- Openstack Management TTNN
- Openstack Setup VM pas dans openstack
- Openstack Installation nouvelle node du cluster
- Openstack Installation TTNN
- Openstack tools for ttnn
Ajout d'un OSD classique¶
$ ceph-disk prepare --zap-disk --cluster-uuid 1fe74663-8dfa-486c-bb80-3bd94c90c967 --fs-type=ext4 /dev/sdX $ smartctl --smart=on /dev/sdX # Pour le monitoring.
Pour un HDD:
$ ceph osd crush add osd.<ID> 0 root=default host=g3
Pour un SSD:
$ ceph osd crush add osd.<ID> 0 root=ssd host=g3-ssd
Ensuite, autoriser Ceph à mettre des data dessus:
$ /root/tools/ceph-reweight-osds.sh osd.<ID>
Ajout d'un OSD qui partage le SSD avec l'OS¶
En général avec ceph, on donne un disque, ceph créé 2 partitions une pour le journal de l'OSD, l'autre pour les datas
mais pour le SSD de tetaneutral qui a aussi l'OS, voici la méthode
Création manuelle de la partition de data ceph /dev/sda2 ici
Debian (MBR format):
apt-get install partprobe fdisk /dev/sda n p <enter> <enter> <enter> <enter> w $ partprobe
Ubuntu (GPT format):
# parted /dev/sdb GNU Parted 2.3 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Model: ATA SAMSUNG MZ7KM480 (scsi) Disk /dev/sdb: 480GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 20.0GB 20.0GB primary ext4 boot 2 20.0GB 36.0GB 16.0GB primary linux-swap(v1) (parted) mkpart Partition type? primary/extended? Partition type? primary/extended? primary File system type? [ext2]? xfs Start? Start? 36.0GB End? 100% (parted) print Model: ATA SAMSUNG MZ7KM480 (scsi) Disk /dev/sdb: 480GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 20.0GB 20.0GB primary ext4 boot 2 20.0GB 36.0GB 16.0GB primary linux-swap(v1) 3 36.0GB 480GB 444GB primary (parted) quit Information: You may need to update /etc/fstab.
On prepare le disk comme normalement
ceph-disk prepare --fs-type=ext4 --cluster-uuid 1fe74663-8dfa-486c-bb80-3bd94c90c967 /dev/sda2 ceph-disk activate /dev/sda2 ceph osd crush add osd.<ID> 0 root=ssd host=g3-ssd
Ensuite, autoriser Ceph à mettre des data dessus:
$ /root/tools/ceph-reweight-osds.sh osd.<ID>
Suppression d'un OSD:¶
remove_osd(){
name="$1"
ceph osd out ${name}
stop ceph-osd id=${name#osd.} # ou sous debian: /etc/init.d/ceph stop ${name}
ceph osd crush remove ${name}
ceph auth del ${name}
ceph osd rm ${name}
ceph osd tree
}
Remplacement à froid d'un tier cache:¶
upstream doc: http://docs.ceph.com/docs/master/rados/operations/cache-tiering/
ceph osd tier cache-mode ec8p2c forward rados -p ec8p2c cache-flush-evict-all ceph osd tier remove-overlay ec8p2 ceph osd tier remove ec8p2 ec8p2c rados rmpool ec8p2c ec8p2c --yes-i-really-really-mean-ita ceph osd pool create ec8p2c 128 128 replicated ceph osd tier add ec8p2 ec8p2c ceph osd tier cache-mode ec8p2c writeback ceph osd tier set-overlay ec8p2 ec8p2c ceph osd pool set ec8p2c size 3 ceph osd pool set ec8p2c min_size 2 ceph osd pool set ec8p2c hit_set_type bloom ceph osd pool set ec8p2c hit_set_count 1 ceph osd pool set ec8p2c hit_set_period 3600 ceph osd pool set ec8p2c target_max_bytes 200000000000 ceph osd pool set ec8p2c target_max_objects 10000000 ceph osd pool set ec8p2c cache_target_dirty_ratio 0.4 ceph osd pool set ec8p2c cache_target_full_ratio 0.8