Ceph problem

A

anton.chasnyk

New Member
Jul 12, 2016
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I installed proxmox4.4 and ceph jewel, according by manual, but i got a problem with my OSDs.
If I reboot first node, OSDs on this node still online and my VMs are suspended

size/min - 2/1
pg num - 128

OSDs:
node1
- osd.0
- osd.1
node 2
- osd.3
- osd.4
node 3
- no OSDs


In debug message I found this:
Code: 
[    3.391884] systemd[1]: [/lib/systemd/system/ceph-osd@.service:18] Unknown lvalue 'TasksMax' in section 'Service'
[    3.392414] systemd[1]: [/lib/systemd/system/ceph-osd@.service:18] Unknown lvalue 'TasksMax' in section 'Service'
[    3.393806] systemd[1]: [/lib/systemd/system/ceph-mon@.service:24] Unknown lvalue 'TasksMax' in section 'Service'


UPD: On both two nodes with OSDs I got this problem. (I have total three nodes, one node without OSDs)

UPD: Ceph Config:
Code: 
[global]
     auth client required = cephx
     auth cluster required = cephx
     auth service required = cephx
     cluster network = 192.168.87.0/24
     filestore xattr use omap = true
     fsid = 5ee20a5b-eeb2-4bcb-86a5-57cd9421c0d9
     keyring = /etc/pve/priv/$cluster.$name.keyring
     osd journal size = 5120
     osd pool default min size = 1
     public network = 192.168.87.0/24

[osd]
     keyring = /var/lib/ceph/osd/ceph-$id/keyring

[mon.1]
     host = node1
     mon addr = 192.168.87.15:6789

[mon.2]
     host = node2
     mon addr = 192.168.87.13:6789

[mon.0]
     host = node3
     mon addr = 192.168.87.14:6789

Code: 
#
begin crush map
tunable choose_local_tries 0
tunable choose_local_fallback_tries 0
tunable choose_total_tries 50
tunable chooseleaf_descend_once 1
tunable chooseleaf_vary_r 1
tunable straw_calc_version 1
tunable allowed_bucket_algs 54

# devices
device 0 osd.0
device 1 osd.1
device 2 osd.2
device 3 osd.3

# types
type 0 osd
type 1 host
type 2 chassis
type 3 rack
type 4 row
type 5 pdu
type 6 pod
type 7 room
type 8 datacenter
type 9 region
type 10 root

# buckets
host node1 {
         id -2 # do not change unnecessarily
         # weight 1.851
         alg straw hash 0 # rjenkins1
         item osd.0 weight 0.926
         item osd.1 weight 0.926
}

host node2 {
         id -3 # do not change unnecessarily
         # weight 1.851 alg straw
         hash 0 # rjenkins1
         item osd.2 weight 0.926
         item osd.3 weight 0.926
}

root default {
          id -1 # do not change unnecessarily
          # weight 3.703
          alg straw
          hash 0 # rjenkins1
          item h2 weight 1.851
          item h1 weight 1.851
}

# rules
rule replicated_ruleset {
          ruleset 0
          type replicated
          min_size 1
          max_size 10
          step take default step chooseleaf firstn 0 type host 
          step emit
} # end crush map
 
Last edited:
Hi,
is your ceph-cluster healthy?
What is the output of
Code: 
ceph -s
Code: 
osd pool default min size = 1
Click to expand...
"osd pool default min size = 1" is dangerous!

It's highly recommended to use 3 replica - so you must have on min. three hosts OSDs.

How look your pools?
Code: 
for i in `ceph osd lspools | tr -d ",[0-9]"`
  do
    ceph osd dump | grep \'$i\'
done
Udo
 
udo said:
Hi,
is your ceph-cluster healthy?
What is the output of
Code: 
ceph -s

"osd pool default min size = 1" is dangerous!

It's highly recommended to use 3 replica - so you must have on min. three hosts OSDs.

How look your pools?
Code: 
for i in `ceph osd lspools | tr -d ",[0-9]"`
  do
    ceph osd dump | grep \'$i\'
done
Udo
Click to expand...

ceph -s
Code: 
 cluster 5ee20a5b-eeb2-4bcb-86a5-57cd9421c0d9
     health HEALTH_OK
     monmap e3: 3 mons at {0=192.168.87.14:6789/0,1=192.168.87.15:6789/0,2=192.168.87.13:6789/0}
            election epoch 30, quorum 0,1,2 2,0,1
     osdmap e61: 4 osds: 4 up, 4 in
            flags sortbitwise,require_jewel_osds
      pgmap v176: 128 pgs, 1 pools, 0 bytes data, 0 objects
            138 MB used, 3791 GB / 3791 GB avail
                 128 active+clean

My pool looks like this :
Code: 
pool 4 'rbd'
replicated size 2
min_size 1
crush_ruleset 0
object_hash rjenkins
pg_num 128
pgp_num 128
last_change 61
flags hashpspool
stripe_width 0

"osd pool default min size = 1" is dangerous!
Click to expand...
I will fix it soon, thx
 
udo said:
Hi,
but you need three osd-hosts, replica=3 to archive with "osd pool default min size = 2" an secure behavior, where one node can go down without interuption.

Udo
Click to expand...
I recreate my pool:
Code: 
pool 8 'rbd'
replicated size 3
min_size 2
crush_ruleset 0
object_hash rjenkins
pg_num 128
pgp_num 128
last_change 167
flags hashpspool
stripe_width 0
and setup OSDs this like:
OSDs:
node1
- osd.0
- osd.1
node 2
- osd.3
node 3
- osd.4

In this configuration cluster working fine. Thanks for help.
 
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