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Archive for March, 2018

missing icmp_seq numbers

In case you see these missing icmp_seq numbers: [root@mdskvm-p01 ~]# ping 192.168.0.149 PING 192.168.0.149 (192.168.0.149) 56(84) bytes of data. 64 bytes from 192.168.0.149: icmp_seq=1 ttl=64 time=0.536 ms 64 bytes from 192.168.0.149: icmp_seq=3 ttl=64 time=0.240 ms 64 bytes from 192.168.0.149: icmp_seq=7 ttl=64 time=0.330 ms 64 bytes from 192.168.0.149: icmp_seq=11 ttl=64 time=0.331 ms 64 bytes from 192.168.0.149: [...]

Extending the size of your mdadm array.

Extending the size of your mdadm array.  Now that you've replaced all the failed disks, we can double the size of our array to 8TB from 4TB. We start off with this array: [root@mbpc-pc log]# mdadm –detail /dev/md0 /dev/md0:         Version : 1.2   Creation Time : Mon Mar 26 00:06:24 2012 [...]

pam_reply called with result [4]: System error.

So you're trying to login and get these messages on ovirt01 (192.168.0.145) and ipaclient01 (192.168.0.236).  What could be wrong:  (Thu Mar 22 23:59:26 2018) [sssd[be[nix.mds.xyz]]] [ldb] (0×4000): cancel ldb transaction (nesting: 2) (Thu Mar 22 23:59:26 2018) [sssd[be[nix.mds.xyz]]] [sysdb_mod_group_member] (0×0080): ldb_modify failed: [No such object](32)[ldb_wait from ldb_modify with LDB_WAIT_ALL: No such object (32)] (Thu Mar [...]

Windows 7 Cannot Resolve hostnames via PING but nslookup works.

It may happen that you can't ping a hostname either internally on a local DNS you may be running or externally.   Flushing the DNS cache may not work either: C:\Users\tom>ipconfig /flushdns Windows IP Configuration Successfully flushed the DNS Resolver Cache. C:\Users\tom>ping vcsa01 Ping request could not find host vcsa01. Please check the name and try [...]

failed command: READ FPDMA QUEUED FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE

So my last Seagate SATA drive in my RAID 6 Array died spectacularly taking out my 4.8.4 Kernel and locking up my storage to the point where the only way I can get to it is via the kernel boot parameter init=/bin/bash .  The disk lasted about 5.762 years:  

GlusterFS: Configuration and Setup w/ NFS-Ganesha for an HA NFS Cluster (Quick Start Guide)

This is a much shorter version of our troubleshooting article on NFS Ganesh we created earlier.  This is meant as a quick start guide for those who just want to get this server up and running very quickly.  The point of High Availabilty is that the best implement HA solutions never allow any outage to [...]

Cannot find key for kvno in keytab

If you are getting this: krb5_child.log:(Tue Mar  6 23:18:46 2018) [[sssd[krb5_child[3193]]]] [map_krb5_error] (0×0020): 1655: [-1765328340][Cannot find key for nfs/nfs01.nix.my.dom@NIX.my.dom kvno 6 in keytab] Then you can resolve it by copying the old keytab file back (or removing the incorrect entries using ktutil).  In our case we had made a saved copy and readded the NFS [...]

Name resolution for the name timed out after none of the configured DNS servers responded.

You're getting this:  Name resolution for the name <URL> timed out after none of the configured DNS servers responded. One of the resolutions is to adjust a few network parameters:  netsh interface tcp set global rss=disabled netsh interface tcp set global autotuninglevel=disabled netsh int ip set global taskoffload=disabled Then set these registry options:  regedit: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters [...]

Ping request could not find host HOST. Please check the name and try again .

ping cannot find host but nslookup on a host works just fine:   Ping request could not find host HOST. Please check the name and try again. Restart the DNS Client Service in Windows Services to resolve this one.  A few other commands to try:   ipconfig /flushdns ipconfig / registerdns Following this, check eventviewer why it [...]


     
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