Thanks Sage.
The PG are in "active+clean" state after changing the crush rule to
separate replicas across osds.
For the replicas across hosts, I'll try it when there're more nodes.
On 15:56 Thu 24 Oct, Sage Weil wrote:
> On Thu, 24 Oct 2019, Liu, Changcheng wrote:
> > On 11:24 Thu 24 Oct, Sage Weil wrote:
> > > The default placement policy is to separate replicas across hosts, and
> > > you only have one host. You can create a new rule that replicas across
> > > osds with 'ceph osd crush rule create-replicated ...' and switch your data
> > > pool to that with 'ceph osd pool set crush_rule $pool $rulename'.
> >
> > If this is the case, why there's no problem when creating pool based on
> > 3-OSD created in vstart environment? Could this problem be solved in single
> > node cluster?
>
> vstart sets the default failure domain to OSD instead of host.
> ceph-deploy is usually used for real clusters, where a host failure domain
> is a better default.
>
> > Previously, I also created 2 nodes cluster with 4-OSDs(3 OSD on A node,
> > 1 OSD on B node, default crush rule). It also hit the same problem.
>
> With 2 nodes you probably ended up with PGs in active+undersized
>
> s
>
> > >
> > > s
> > >
> > > On Thu, 24 Oct 2019, Liu, Changcheng wrote:
> > >
> > > > Hi all,
> > > > I'm using ceph-deploy tool to deploy single node cluster based on
> > > > Ceph master branch(head id: bf09a04d2). The PGs are inactive and undersized.
> > > > -bash-4.2$ ceph -s
> > > > cluster:
> > > > id: 93e5ff9c-1dee-4bd8-9b0a-318b917dfd8c
> > > > health: HEALTH_WARN
> > > > Reduced data availability: 4 pgs inactive
> > > > Degraded data redundancy: 4 pgs undersized
> > > >
> > > > services:
> > > > mon: 1 daemons, quorum rdmarhel0 (age 30m)
> > > > mgr: rdmarhel0(active, since 29m)
> > > > osd: 3 osds: 3 up (since 25m), 3 in (since 25m)
> > > >
> > > > data:
> > > > pools: 1 pools, 4 pgs
> > > > objects: 0 objects, 0 B
> > > > usage: 3.0 GiB used, 834 GiB / 837 GiB avail
> > > > pgs: 100.000% pgs not active
> > > > 4 undersized+peered
> > > >
> > > > -bash-4.2$
> > > >
> > > > Other info is attached.
> > > >
> > > > I apply below patch based on head-id:bf09a04d2. It's for Ceph/RDMA deployment.
> > > > The above problem is hit whatever for RDMA-messenger deployment or Posix-TCP-messenger deployment.
> > > > diff --git a/systemd/ceph-fuse@xxxxxxxxxxx b/systemd/ceph-fuse@xxxxxxxxxxx
> > > > index d603042..ff2e907 100644
> > > > --- a/systemd/ceph-fuse@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-fuse@xxxxxxxxxxx
> > > > @@ -12,6 +12,7 @@ ExecStart=/usr/bin/ceph-fuse -f --cluster ${CLUSTER} %I
> > > > LockPersonality=true
> > > > MemoryDenyWriteExecute=true
> > > > NoNewPrivileges=true
> > > > +LimitMEMLOCK=infinity
> > > > # ceph-fuse requires access to /dev fuse device
> > > > PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > diff --git a/systemd/ceph-mds@xxxxxxxxxxx b/systemd/ceph-mds@xxxxxxxxxxx
> > > > index 39a2e63..0e58dfe 100644
> > > > --- a/systemd/ceph-mds@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-mds@xxxxxxxxxxx
> > > > @@ -14,7 +14,8 @@ ExecReload=/bin/kill -HUP $MAINPID
> > > > LockPersonality=true
> > > > MemoryDenyWriteExecute=true
> > > > NoNewPrivileges=true
> > > > -PrivateDevices=yes
> > > > +LimitMEMLOCK=infinity
> > > > +PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > ProtectHome=true
> > > > ProtectKernelModules=true
> > > > diff --git a/systemd/ceph-mgr@xxxxxxxxxxx b/systemd/ceph-mgr@xxxxxxxxxxx
> > > > index c98f637..682c7ec 100644
> > > > --- a/systemd/ceph-mgr@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-mgr@xxxxxxxxxxx
> > > > @@ -18,7 +18,8 @@ LockPersonality=true
> > > > MemoryDenyWriteExecute=false
> > > >
> > > > NoNewPrivileges=true
> > > > -PrivateDevices=yes
> > > > +LimitMEMLOCK=infinity
> > > > +PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > ProtectHome=true
> > > > ProtectKernelModules=true
> > > > diff --git a/systemd/ceph-mon@xxxxxxxxxxx b/systemd/ceph-mon@xxxxxxxxxxx
> > > > index c95fcab..51854fa 100644
> > > > --- a/systemd/ceph-mon@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-mon@xxxxxxxxxxx
> > > > @@ -21,7 +21,8 @@ LockPersonality=true
> > > > MemoryDenyWriteExecute=true
> > > > # Need NewPrivileges via `sudo smartctl`
> > > > NoNewPrivileges=false
> > > > -PrivateDevices=yes
> > > > +LimitMEMLOCK=infinity
> > > > +PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > ProtectHome=true
> > > > ProtectKernelModules=true
> > > > diff --git a/systemd/ceph-osd@xxxxxxxxxxx b/systemd/ceph-osd@xxxxxxxxxxx
> > > > index 1b5c9c8..06c20d7 100644
> > > > --- a/systemd/ceph-osd@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-osd@xxxxxxxxxxx
> > > > @@ -16,6 +16,8 @@ LockPersonality=true
> > > > MemoryDenyWriteExecute=true
> > > > # Need NewPrivileges via `sudo smartctl`
> > > > NoNewPrivileges=false
> > > > +LimitMEMLOCK=infinity
> > > > +PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > ProtectHome=true
> > > > ProtectKernelModules=true
> > > > diff --git a/systemd/ceph-radosgw@xxxxxxxxxxx b/systemd/ceph-radosgw@xxxxxxxxxxx
> > > > index 7e3ddf6..fe1a6b9 100644
> > > > --- a/systemd/ceph-radosgw@xxxxxxxxxxx
> > > > +++ b/systemd/ceph-radosgw@xxxxxxxxxxx
> > > > @@ -13,7 +13,8 @@ ExecStart=/usr/bin/radosgw -f --cluster ${CLUSTER} --name client.%i --setuser ce
> > > > LockPersonality=true
> > > > MemoryDenyWriteExecute=true
> > > > NoNewPrivileges=true
> > > > -PrivateDevices=yes
> > > > +LimitMEMLOCK=infinity
> > > > +PrivateDevices=no
> > > > ProtectControlGroups=true
> > > > ProtectHome=true
> > > > ProtectKernelModules=true
> > > > diff --git a/systemd/ceph-volume@.service b/systemd/ceph-volume@.service
> > > > index c21002c..e2d1f67 100644
> > > > --- a/systemd/ceph-volume@.service
> > > > +++ b/systemd/ceph-volume@.service
> > > > @@ -9,6 +9,7 @@ KillMode=none
> > > > Environment=CEPH_VOLUME_TIMEOUT=10000
> > > > ExecStart=/bin/sh -c 'timeout $CEPH_VOLUME_TIMEOUT /usr/sbin/ceph-volume-systemd %i'
> > > > TimeoutSec=0
> > > > +LimitMEMLOCK=infinity
> > > >
> > > > [Install]
> > > > WantedBy=multi-user.target
> > > > --
> > > > 1.8.3.1
> > > >
> > > >
> >
> >
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