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Create new pool and place new osd » History » Version 7

Jin-Guk Kwon, 09/14/2020 12:25 PM

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h1. Create new pool and place new osd
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h2. 1. create a new pool
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manual
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https://docs.ceph.com/docs/jewel/rados/operations/pools/#create-a-pool
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h3. check a current pool
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<pre>
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ceph osd lspools
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</pre>
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h3. create a new pool
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<pre>
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ceph osd pool create {pool-name} {pg-num} [{pgp-num}] [replicated] \
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     [crush-ruleset-name] [expected-num-objects]
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</pre>
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osds are 5~10 -->  pg_num 512
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osds are 10~50 --> pg_num 4096
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osds are more than 50 --> need to calculation(pgcalc) 
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<pre>
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ex) ceph osd pool create xruk-ssd-pool 128 128
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</pre>
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h2. 2. create a rule for new pool 
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manual 
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https://docs.ceph.com/docs/master/rados/operations/crush-map/#creating-a-rule-for-a-replicated-pool
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h3. check a current rule
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<pre>
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ceph osd crush rule ls
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</pre>
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h3. create a new rule(copy from existing rule)
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<pre>
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ceph osd crush rule create-replicated <rule-name> <root> <failure-domain> <class>
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</pre>
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<pre>
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ex) ceph osd crush rule create-replicated xruk-ssd-rule default host xruk-ssd
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</pre>
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h2. 3. assign a crush rule to new pool
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manual
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https://docs.ceph.com/docs/master/rados/operations/crush-map/#device-classes
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- assgin a new crush-rule to a new pool
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<pre>
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ceph osd pool set <pool-name> crush_rule <rule-name>
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</pre>
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<pre>
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ex) ceph osd pool set xruk-ssd-pool crush_rule xruk-ssd-rule
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</pre>
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h2. 4. update a key infro to access a new pool
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manual
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https://docs.ceph.com/docs/mimic/rados/operations/user-management/
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h3. check the current key
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- check the list of key
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<pre>
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ceph auth ls
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</pre>
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- get info about the opennbula's key
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<pre>
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ceph auth get client.libvirt
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</pre>
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- update a key's info
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<pre>
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ceph auth caps USERTYPE.USERID {daemon} 'allow [r|w|x|*|...] [pool={pool-name}] [namespace={namespace-name}]' [{daemon} 'allow [r|w|x|*|...] [pool={pool-name}] [namespace={namespace-name}]']
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mon 'profile {name}' 
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osd 'profile {name} [pool={pool-name} [namespace={namespace-name}]]'
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</pre>
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<pre>
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ex) ceph auth caps client.libvirt mon 'profile rbd' osd 'profile rbd pool=xruk-ssd-pool, profile rbd pool=hdd, profile rbd pool=ssd'
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</pre>
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- verify a updated key
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<pre>
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ceph auth get client.libvirt
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</pre>
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h2. 5. set ceph application enable
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<pre>
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ceph osd pool application enable <pool-name> <app-name>', where <app-name> is 'cephfs', 'rbd', 'rgw', or freeform for custom applications
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</pre>
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<pre>
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ex)
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~# ceph osd pool application enable xruk-ssd-pool rbd
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enabled application 'rbd' on pool 'xruk-ssd-pool'
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</pre>