I'm working on master branch and deploy two nodes cluster. Data is transferring over RDMA.
[admin@server0 ~]$ sudo ceph daemon osd.0 perf dump AsyncMessenger::RDMAWorker-1
{
"AsyncMessenger::RDMAWorker-1": {
"tx_no_mem": 0,
"tx_parital_mem": 0,
"tx_failed_post": 0,
"tx_chunks": 26966,
"tx_bytes": 52789637,
"rx_chunks": 26916,
"rx_bytes": 52812278,
"pending_sent_conns": 0
}
}
The only difference is that I don’t differentiate public/cluster network in my cluster.
You can try to make all public/cluster network use RDMA.
Note:
1) If both public/cluster use RDMA, we can’t differentiate them in different subnetwork. This is feature limited. I'm planning to solve it in future)
2) I'll confirm with my colleague that whether cluster network is really used in 14.2.4. We also hit similar problem these days even using TCP async messenger.
Below is my cluster's ceph configuration.
I also attach the systemd patch used in my side.
[admin@server0 ~]$ cat /etc/ceph/ceph.conf
[global]
cluster = ceph
fsid = 24280750-d4f7-4d4f-89e4-f95b8fab87ff
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
osd pool default size = 2
osd pool default min size = 2
osd pool default pg num = 64
osd pool default pgp num = 128
osd pool default crush rule = 0
osd crush chooseleaf type = 1
mon_allow_pool_delete=true
osd_pool_default_pg_autoscale_mode=off
ms_type = async+rdma
ms_async_rdma_device_name = mlx5_0
mon_initial_members = server0
mon_host = 172.16.1.4
[mon.rdmarhel0]
host = server0
mon addr = 172.16.1.4
[admin@server0 ~]$
B.R.
Changcheng
On 13:07 Wed 30 Oct, Mason-Williams, Gabryel (DLSLtd,RAL,LSCI) wrote:
> 1. The current problem is that it still sending data over the ethernet
> instead of ib.
> 2. [global]
> fsid=xxxx
> mon_initial_members = node1, node2, node3
> mon_host = xxx.xx.xxx.ab,xxx.xx.xxx.ac, xxx.xx.xxx.ad
> auth_cluster_required = cephx
> auth_service_required = cephx
> auth_client_required = cephx
> public_network = xxx.xx.xxx.0/24
> cluster_network = xx.xxx.0.0/16
> ms_cluster_type = async+rdma
> ms_type = async+rdma
> ms_public_type = async+posix
> [mgr]
> ms_type = async+posix
> 3. The ceph cluster is deployed using ceph-deploy then once up all of
> the daemons are turned off the rdma cluster config is then sent
> around then once that is complete the daemons are turned back on.
> The ulimit is set to unlimited, LimitMEMLOCK=infinity is set on the
> ceph-disk@.service, ceph-mds@.service, ceph-mon@.service,
> ceph-osd@.service, ceph-radosgw@.service, aswell as
> PrivateDevices=no on ceph-mds@.service, ceph-mon@.service and
> ceph-radosgw@.service. The ethernet mtu is set to 1000
> __________________________________________________________________
>
> From: Liu, Changcheng <changcheng.liu@xxxxxxxxx>
> Sent: 30 October 2019 12:24
> To: Mason-Williams, Gabryel (DLSLtd,RAL,LSCI)
> <gabryel.mason-williams@xxxxxxxxxxxxx>
> Cc: dev@xxxxxxx <dev@xxxxxxx>
> Subject: Re: RMDA Bug?
>
> 1. What's the problem do you hit when using RDMA in 14.2.4? Any log
> shows the error?
> 2. What's your ceph.conf?
> 3. How do you deploy the ceph cluster? RDMA need lock some memory. So,
> it needs change some system configuration to meet with this
> requirement?
> On 11:21 Wed 30 Oct, Gabryel Mason-Williams wrote:
> > Liu, Changcheng wrote:
> > > On 07:31 Mon 28 Oct, Mason-Williams, Gabryel (DLSLtd,RAL,LSCI)
> wrote:
> > > > I am using ceph version 12.2.8
> > > > (ae699615bac534ea496ee965ac6192cb7e0e07c0) luminous (stable).
> > > >
> > > > I have not checked the master branch do you think this is an
> issue in
> > > > luminous that has been removed in later versions? I
> haven't hit problem
> > > on master branch. Ceph/RDMA changed a lot
> > > from luminous to master branch.
> > >
> > > Is below configuration really needed in luminous/ceph.conf?
> > > > ms_async_rdma_local_gid = xxxx On master branch,
> this
> > > parameter is not needed at all.
> > > B.R.
> > > Changcheng
> > > >
> __________________________________________________________________
> >
> > Thanks, the issue of the OSD's falling over seems to have gone away
> updating to Nautilus 14.2.4. However, I am still unable to get it to
> properly communicate over RDMA even with removing
> ms_async_rdma_local_gid.
> > _______________________________________________
> > Dev mailing list -- dev@xxxxxxx
> > To unsubscribe send an email to dev-leave@xxxxxxx
>
>
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>From 40fa0d7096364b410e8242c46967029fb949876a Mon Sep 17 00:00:00 2001
From: Changcheng Liu <changcheng.liu@xxxxxxxxxx>
Date: Tue, 23 Jul 2019 18:50:57 +0800
Subject: [PATCH] rdma systemd: grant access to /dev and unlimit mem
Signed-off-by: Changcheng Liu <changcheng.liu@xxxxxxxxxx>
diff --git a/systemd/ceph-fuse@xxxxxxxxxxx b/systemd/ceph-fuse@xxxxxxxxxxx
index d603042b12..ff2e9072f6 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 39a2e63105..0e58dfeeea 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 c98f6378b9..682c7ecef3 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 c95fcabb26..51854fad96 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 1b5c9c82b8..06c20d7c83 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 7e3ddf6c04..fe1a6b9159 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 c21002cecb..e2d1f67b85 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
--
2.17.1
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