How to fix “NoValidHost: No valid host was found. There are not enough hosts available” during overcloud deployment (openstack)

How to fix

Error: NoValidHost: No valid host was found You get below error message on the console while performing an overcloud deployment from the undercloud director 2018-08-14 06:42:59Z [overcloud.Controller.0.Controller]: CREATE_FAILED  ResourceInError: resources.Controller: Went to status ERROR due to “Message: No valid host was found. There are not enough hosts available., Code: 500” 2018-08-14 06:42:59Z [overcloud.Controller.0]: CREATE_FAILED  Resource … Read more

How to fix “Software selection (Source changed – please verify)”

How to fix

This is one of the most common error you will face if you are working on unattended Red Hat Linux installation where you have a customised list of Packages. Error: Solution: This error basically means that the list of rpms you planned on installation has one or many dependency issues hence the installation is halted … Read more

How to fix “mountd: refused mount request: unmatched host”

Error: On Client (192.169.32.17) # mount 192.169.32.10:/export/home/deepak /mnt mount.nfs: access denied by server while mounting 192.169.32.10:/export/home/deepak On NFS Server (192.169.32.10) # tail -n 1 /var/log/messages Sep 13 00:00:32 cc01-nds-ins rpc.mountd[29613]: refused mount request from 192.169.32.17 for /export/home/deepak (/export/home/deepak): unmatched host   Solution: This error is occurring because the NFS server is unaware of the client … Read more

ORA-28002: the password will expire within 6 days (certain string)

ORA-28002: the password will expire within 6 days (certain string)

I have been working in Sql developer for certain time, few days back found new notification/warning  windows is popping up with the error message – ORA-28002: the password will expire within 6 days (certain string) as below : Although there are many other ways you can get rid of this notification/warning like changing the user … Read more