61 lines
1.9 KiB
Markdown
61 lines
1.9 KiB
Markdown
# managing ceph
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Always refer back to the official documentation at https://docs.ceph.com/en/latest
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## adding new cephfs
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- create a erasure code profile which will allow you to customise the raid level
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- raid5 with 3 disks? k=2,m=1
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- raid5 with 6 disks? k=5,m=1
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- raid6 with 4 disks? k=2,m=2, etc
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- create osd pool using custom profile for data
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- create osd pool using default replicated profile for metadata
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- enable ec_overwrites for the data pool
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- create the ceph fs volume using data/metadata pools
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- set ceph fs settings
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- specify minimum number of metadata servers (mds)
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- set fs to be for bulk data
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- set mds fast failover with standby reply
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```
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sudo ceph osd erasure-code-profile set ec_4_1 k=4 m=1
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sudo ceph osd pool create media_data 128 erasure ec_4_1
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sudo ceph osd pool create media_metadata 32 replicated_rule
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sudo ceph osd pool set media_data allow_ec_overwrites true
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sudo ceph osd pool set media_data bulk true
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sudo ceph fs new mediafs media_metadata media_data --force
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sudo ceph fs set mediafs allow_standby_replay true
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sudo ceph fs set mediafs max_mds 2
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```
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## creating authentication tokens
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- this will create a client keyring named media
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- this client will have the following capabilities:
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- mon: read
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- mds:
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- read /
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- read/write /media
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- read/write /common
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- osd: read/write to cephfs_data pool
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```
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sudo ceph auth get-or-create client.media \
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mon 'allow r' \
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mds 'allow r path=/, allow rw path=/media, allow rw path=/common' \
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osd 'allow rw pool=cephfs_data'
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```
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## list the authentication tokens and permissions
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ceph auth ls
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## change the capabilities of a token
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this will overwrite the current capabilities of a given client.user
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sudo ceph auth caps client.media \
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mon 'allow r' \
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mds 'allow rw path=/' \
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osd 'allow rw pool=media_data'
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