If you found this page you already know why you are looking for this, your server /dev/mapper/cs-root is filled due to /var/lib/docker taking up most of the space
Yes, you can change the location of the Docker overlay2 storage directory by modifying the
daemon.json file. Here’s how to do it:
Open or create the daemon.json file using a text editor:
sudo nano /etc/docker/daemon.json
Replace “/path/to/new/location/docker” with the path to the new location of the overlay2 directory.
If the file already contains other configuration settings, add the
"data-root" setting to the file under the
Save the file and Restart docker
sudo systemctl restart docker
Don’t forget to remove the old data
rm -rf /var/lib/docker/overlay2
As a Part of my pre-flight check for Vcenter upgrades i like to mount the ISO and go through the first 3 steps, during this I noticed the installer cannot connect to the source appliance with this error
2019-05-01T20:05:02.052Z - info: Stream :: close
2019-05-01T20:05:02.052Z - info: Password not expired
2019-05-01T20:05:02.054Z - error: sourcePrecheck: error in getting source Info: ServerFaultCode: Failed to authenticate with the guest operating system using the supplied credentials.
2019-05-01T20:05:03.328Z - error: Request timed out after 30000 ms, url: https://vcenter.companyABC.local:443/
2019-05-01T20:05:09.675Z - info: Log file was saved at: C:\Users\MCbits\Desktop\installer-20190501-160025555.log
trying to reset via the admin interface or the DCUI didn’t work, after digging around found a way to reset it by forcing the vcenter to boot in to single user mode
- Take a snapshot or backup of the vCenter Server Appliance before proceeding. Do not skip this step.
- Reboot the vCenter Server Appliance.
- After the OS starts, press e key to enter the GNU GRUB Edit Menu.
- Locate the line that begins with the word Linux.
- Append these entries to the end of the line: rw init=/bin/bash The line should look like the following screenshot:
After adding the statement, press F10 to continue booting
Vcenter appliance will boot into single user mode
Type passwd to reset the root password
if you run into the following error message
"Authentication token lock busy"
you need to re-mount the filesystem in RW, which lets you change between read-only and read-write. this will allow you to make changes
mount -o remount,rw /
Until next time !!!