Hi Adrian, If you’re just using this for test/familiarity and performance isn’t an issue, then I’d create 3 x VMs on your host server and use them for Ceph.
It’ll work fine, just don’t expect Gb/s in transfer speeds 😊 A> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: Adrian Sevcenco<mailto:adrian.sevce...@cern.ch> Sent: 12 March 2021 11:22 To: ceph-users@ceph.io<mailto:ceph-users@ceph.io> Subject: [ceph-users] Re: ceph boostrap initialization :: nvme drives not empty after >12h On 3/12/21 12:31 PM, Eneko Lacunza wrote: > Hi Adrian, Hi! > El 12/3/21 a las 11:26, Adrian Sevcenco escribió: >> Hi! yesterday i bootstrapped (with cephadm) my first ceph installation >> and things looked somehow ok .. but today the osds are not yet ready >> and i have in dashboard this warnings: >> MDS_SLOW_METADATA_IO: 1 MDSs report slow metadata IOs >> PG_AVAILABILITY: Reduced data availability: 64 pgs inactive >> PG_DEGRADED: Degraded data redundancy: 2/14 objects degraded >> (14.286%), 66 pgs undersized >> TOO_FEW_OSDS: OSD count 2 < osd_pool_default_size 3 > > This is the issue. You only have 2 OSDs, but the pool default size is 3. it should not as i changed the values: ceph osd pool ls detail pool 1 'NVME' replicated size 2 min_size 1 crush_rule 0 object_hash rjenkins pg_num 128 pgp_num 1 pgp_num_target 128 autoscale_mode on last_change 69 lfor 0/0/54 flags hashpspool,selfmanaged_snaps stripe_width 0 pg_num_min 64 application cephfs,rbd pool 2 'device_health_metrics' replicated size 2 min_size 1 crush_rule 0 object_hash rjenkins pg_num 2 pgp_num 1 pgp_num_target 2 autoscale_mode on last_change 76 lfor 0/0/60 flags hashpspool stripe_width 0 pg_num_min 2 application mgr_devicehealth pool 3 'cephfs.sev-ceph.meta' replicated size 2 min_size 1 crush_rule 0 object_hash rjenkins pg_num 32 pgp_num 32 autoscale_mode on last_change 77 flags hashpspool stripe_width 0 pg_autoscale_bias 4 pg_num_min 16 recovery_priority 5 application cephfs pool 4 'cephfs.sev-ceph.data' replicated size 2 min_size 1 crush_rule 0 object_hash rjenkins pg_num 32 pgp_num 32 autoscale_mode on last_change 79 flags hashpspool stripe_width 0 application cephfs >> >> and in logs: >> 3/12/21 12:18:19 PM >> [INF] >> OSD <1> is not empty yet. Waiting a bit more >> >> 3/12/21 12:18:19 PM >> [INF] >> OSD <0> is not empty yet. Waiting a bit more >> >> 3/12/21 12:18:19 PM >> [INF] >> Can't even stop one OSD. Cluster is probably busy. Retrying later.. >> >> 3/12/21 12:18:19 PM >> [ERR] >> cmd: osd ok-to-stop failed with: 31 PGs are already too degraded, >> would become too degraded or might become unavailable. (errno:-16) >> >> this is a single node, whole package ceph install with 2 local nvme >> drives as osds (to be used 2x replicated like a raid1 array) >> >> So, can anyone tell me what is going on? > I don't think you should use Ceph for this config. The bare minimum you > should use is 3 nodes, because default failure domain is host. ooooh ... how can i change this to device? > Maybe you can explain what your goal is, so people can recommend setups. so, this is my first encounter with ceph so i just want to have a single node installation of ceph, so i could get familiar with both server administration and with client rbd and mds usage Thank you! Adrian _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
