We have a rhel8 environment with several windows fileservers in dfs using cifs (auto)mounts.
The mount is working when accessed, but when the cifs filesytems/mounts are in heavy use the cifs mount will hang the server intermitted. Only a reboot the linux server will release it. In the console and dmesg the server is waiting for a windows (namespace) fileserver.
There is a DFS namespace with two namespace servers
Rhel8 support now dfs failover it seems, we didn't have this problems with Rhel7.
It looks like it switches between namespace servers, proberly caused by load on the microsoft fileserver.
I've no access to the microsoft environment, or i've no knowledge of ms...
My questions is, did anyone experience the same problems?
Is it allowed to use 2 namespace servers?
(yes, i've made a ticket at Redhat about this issue)
Example autofs configuration, //examplenet.com/dfsroot/subdfsroot is the dfs root:
/etc/auto.master
/mnt/share1/mount/submount /etc/auto.cifs --timeout=60
/etc/auto.cifs
2021 -fstype=cifs,dom=domain,uid=1001,gid=1003,noserverino,vers=3.0,username=yyyyy,password=xxxxx ://examplenet.com/dfsroot/subdfsroot/2021
2022 -fstype=cifs,dom=domain,uid=1001,gid=1003,noserverino,vers=3.0,username=yyyyy,password=xxxxx ://examplenet.com/dfsroot/subdfsroot/2022
2023 -fstype=cifs,dom=domain,uid=1001,gid=1003,noserverino,vers=3.0,username=yyyyy,password=xxxxx ://examplenet.com/dfsroot/subdfsroot/2023
active mounts when accessed:
//examplenet.com/dfsroot/subdfsroot/2021 750G 712G 39G 95% /mnt/share1/mount/submount/2021
//examplenet.com/dfsroot/subdfsroot/2022 750G 712G 39G 95% /mnt/share1/mount/submount/2022
//examplenet.com/dfsroot/subdfsroot/2023 81G 11G 71G 14% /mnt/share1/mount/submount/2023
