Note
Replace {Instance_ID}
with the unique ID of your Instance, e.g. 0500ebd2-d70d-49af-a969-3ac09b6f7fff
.
Rescue mode allows you to boot your Instance into a temporary operating system, running from the Instance’s RAM. Rescue mode is often used to diagnose and resolve issues such as faulty kernel configurations, networking issues, firewall configurations, and more.
To complete the actions presented below, you must have:
boot-type
to rescue
and reboot your Instance into rescue mode using the CLI-Tools:
scw instance server update {Instance_ID} boot-type=rescuescw instance server reboot {Instance_ID}
Replace {Instance_ID}
with the unique ID of your Instance, e.g. 0500ebd2-d70d-49af-a969-3ac09b6f7fff
.
cat /proc/partitionsmajor minor #blocks name8 0 9765625 sda8 1 9634536 sda18 14 3072 sda148 15 126976 sda15
mount /dev/sda1 /mntmount /dev/sda15 /mnt/boot/efimount -o bind /sys /mnt/sysmount -o bind /proc /mnt/procmount -o bind /dev /mnt/dev
chroot
command to get into your Instances’ root filesystem. You can then change the GRUB_DEFAULT
value to boot using the previous kernel:
chroot /mntnano /etc/default/grub
In the example above, we use nano
as text editor. Feel free to use your favorite text editor to edit the file.
GRUB_DEFAULT
to `“1 > 2”:
# head /etc/default/grub# If you change this file, run 'update-grub' afterward to update# /boot/grub/grub.cfg.# For full documentation of the options in this file, see:# info -f grub -n 'Simple configuration'GRUB_DEFAULT="1>2"GRUB_TIMEOUT=5GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`GRUB_CMDLINE_LINUX_DEFAULT=""GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200 earlyprintk=ttyS0,115200 consoleblank=0"
grub
boatloader` to apply the kernel’s update
# update-grubGenerating grub configuration file ...Found linux image: /boot/vmlinuz-6.0.0-0.deb11.2-cloud-amd64Found initrd image: /boot/initrd.img-6.0.0-0.deb11.2-cloud-amd64Found linux image: /boot/vmlinuz-5.19.0-0.deb11.2-cloud-amd64Found initrd image: /boot/initrd.img-5.19.0-0.deb11.2-cloud-amd64Found linux image: /boot/vmlinuz-5.10.0-19-cloud-amd64Found initrd image: /boot/initrd.img-5.10.0-19-cloud-amd64done
boot_type
to local
and reboot the Instance:
scw instance server update {Instance_ID} boot-type=localscw instance server reboot {Instance_ID}
read-only
mode:
[ OK ] Finished Remove Stale Onli…ext4 Metadata Check Snapshots.[ 4.219158] cloud-init[542]: Traceback (most recent call last):[ 4.220328] cloud-init[542]: File "/usr/bin/cloud-init", line 33, in <module>[ 4.221518] cloud-init[542]: sys.exit(load_entry_point('cloud-init==20.4.1', 'console_scripts', 'cloud-init')())[ 4.223064] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 891, in main[ 4.224435] cloud-init[542]: retval = util.log_time([ 4.225251] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 2348, in log_time[ 4.226838] cloud-init[542]: ret = func(*args, **kwargs)[ 4.227743] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 600, in status_wrapper[ 4.229478] cloud-init[542]: util.ensure_dirs((data_d, link_d,))[ 4.230501] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1534, in ensure_dirs[ 4.232014] cloud-init[542]: ensure_dir(d, mode)[ 4.232540] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1591, in ensure_dir[ 4.233980] cloud-init[542]: chmod(path, mode)[ 4.234756] cloud-init[542]: File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1830, in chmod[ 4.235672] cloud-init[542]: os.chmod(path, real_mode)[ 4.236227] cloud-init[542]: OSError: [Errno 30] Read-only file system: '/var/lib/cloud/data'[FAILED] Failed to start Apply the …ngs specified in cloud-config.