[Gluster-users] Gluster mounts becoming stale and never recovering

Wed May 15 01:45:57 UTC 2019

Hi all,

We are having a sporadic issue with our Gluster mounts that is affecting several of our Kubernetes environments. We are having trouble understanding what is causing it, and we could use some guidance from the pros!

Scenario
We have an environment running a single-node Kubernetes with Heketi and several pods using Gluster mounts. The environment runs fine and the mounts appear to be healthy for up to several days. Suddenly, one or more (sometimes all) Gluster mounts report a stale mount and shut down the brick. The affected containers enter a crash loop that continues indefinitely, until someone intervenes. To work-around the crash loop, a user needs to trigger the bricks to be started again--either through manually starting them, restarting the Gluster pod or restarting the entire node.

Diagnostics
Looking at the glusterd.log file, the error message at the time the problem starts looks something like this:

got disconnect from stale rpc on /var/lib/heketi/mounts/vg_c197878af606e71a874ad28e3bd7e4e1/brick_d0456279568a623a16a5508daa89b4d5/brick

This message occurs once for each brick that stops responding. The brick does not recover on its own. Here is that same message again, with surrounding context included.

[2019-05-07 11:53:38.663362] I [run.c:241:runner_log] (-->/usr/lib64/glusterfs/4.1.7/xlator/mgmt/glusterd.so(+0x3a7a5) [0x7f795f0d77a5] -->/usr/lib64/glusterfs/4.1.7/xlator/mgmt/glusterd.so(+0xe2765) [0x7f795f17f765] -->/lib64/libglusterfs.so.0(runner_log+0x115) [0x7f79643180f5] ) 0-management: Ran script: /var/lib/glusterd/hooks/1/stop/pre/S29CTDB-teardown.sh --volname=vol_d0a0dcf9903e236f68a3933c3060ec5a --last=no
[2019-05-07 11:53:38.905338] E [run.c:241:runner_log] (-->/usr/lib64/glusterfs/4.1.7/xlator/mgmt/glusterd.so(+0x3a7a5) [0x7f795f0d77a5] -->/usr/lib64/glusterfs/4.1.7/xlator/mgmt/glusterd.so(+0xe26c3) [0x7f795f17f6c3] -->/lib64/libglusterfs.so.0(runner_log+0x115) [0x7f79643180f5] ) 0-management: Failed to execute script: /var/lib/glusterd/hooks/1/stop/pre/S30samba-stop.sh --volname=vol_d0a0dcf9903e236f68a3933c3060ec5a --last=no
[2019-05-07 11:53:38.982785] I [MSGID: 106542] [glusterd-utils.c:8253:glusterd_brick_signal] 0-glusterd: sending signal 15 to brick with pid 8951
[2019-05-07 11:53:39.983244] I [MSGID: 106143] [glusterd-pmap.c:397:pmap_registry_remove] 0-pmap: removing brick /var/lib/heketi/mounts/vg_c197878af606e71a874ad28e3bd7e4e1/brick_d0456279568a623a16a5508daa89b4d5/brick on port 49169
[2019-05-07 11:53:39.984656] W [glusterd-handler.c:6124:__glusterd_brick_rpc_notify] 0-management: got disconnect from stale rpc on /var/lib/heketi/mounts/vg_c197878af606e71a874ad28e3bd7e4e1/brick_d0456279568a623a16a5508daa89b4d5/brick
[2019-05-07 11:53:40.316466] I [MSGID: 106131] [glusterd-proc-mgmt.c:83:glusterd_proc_stop] 0-management: nfs already stopped
[2019-05-07 11:53:40.316601] I [MSGID: 106568] [glusterd-svc-mgmt.c:235:glusterd_svc_stop] 0-management: nfs service is stopped
[2019-05-07 11:53:40.316644] I [MSGID: 106599] [glusterd-nfs-svc.c:82:glusterd_nfssvc_manager] 0-management: nfs/server.so xlator is not installed
[2019-05-07 11:53:40.319650] I [MSGID: 106131] [glusterd-proc-mgmt.c:83:glusterd_proc_stop] 0-management: bitd already stopped
[2019-05-07 11:53:40.319708] I [MSGID: 106568] [glusterd-svc-mgmt.c:235:glusterd_svc_stop] 0-management: bitd service is stopped
[2019-05-07 11:53:40.321091] I [MSGID: 106131] [glusterd-proc-mgmt.c:83:glusterd_proc_stop] 0-management: scrub already stopped
[2019-05-07 11:53:40.321132] I [MSGID: 106568] [glusterd-svc-mgmt.c:235:glusterd_svc_stop] 0-management: scrub service is stopped

The version of gluster we are using (running in a container, using the gluster/gluster-centos image from dockerhub):

# rpm -qa | grep gluster

glusterfs-rdma-4.1.7-1.el7.x86_64

gluster-block-0.3-2.el7.x86_64

python2-gluster-4.1.7-1.el7.x86_64

centos-release-gluster41-1.0-3.el7.centos.noarch

glusterfs-4.1.7-1.el7.x86_64

glusterfs-api-4.1.7-1.el7.x86_64

glusterfs-cli-4.1.7-1.el7.x86_64

glusterfs-geo-replication-4.1.7-1.el7.x86_64

glusterfs-libs-4.1.7-1.el7.x86_64

glusterfs-client-xlators-4.1.7-1.el7.x86_64

glusterfs-fuse-4.1.7-1.el7.x86_64

glusterfs-server-4.1.7-1.el7.x86_64

The version of gluster running on our Kubernetes node (a CentOS system):

]$ rpm -qa | grep gluster

glusterfs-libs-3.12.2-18.el7.x86_64

glusterfs-3.12.2-18.el7.x86_64

glusterfs-fuse-3.12.2-18.el7.x86_64

glusterfs-client-xlators-3.12.2-18.el7.x86_64

The Kubernetes version:

$  kubectl version

Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.5", GitCommit:"2166946f41b36dea2c4626f90a77706f426cdea2", GitTreeState:"clean", BuildDate:"2019-03-25T15:19:22Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}

Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.5", GitCommit:"2166946f41b36dea2c4626f90a77706f426cdea2", GitTreeState:"clean", BuildDate:"2019-03-25T15:19:22Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}

Full Gluster logs available if needed, just let me know how to provide them.

Thanks in advance for any help or suggestions on this!

Best,

Jeff Bischoff
Turbonomic
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