# vgcreate test_vg /dev/sdc
# pvdisplay
# vgrename test_vg my_vg
# vgextend my_vg /dev/sdg
# pvdisplay
# lvcreate --type raid6 -i 3 -L 1G -n test_lv a_vg
# lvextend -L +128M /dev/mapper/a_vg-test_lv
# pvs
# vgs
ScriptingSquirrel
ScriptingSquirrel
/ create-lvm-raid.md
Last active
August 23, 2018 20:25
Create LVM RAID (WORK IN PROGRESS)
ScriptingSquirrel
/ install-grub-into-all-mbrs.md
Created
August 21, 2018 15:10
Install GRUB boot loader into MBR of each drive
$ for DEVICE in /dev/sd?; do sudo grub-install $DEVICE; done
ScriptingSquirrel
/ per-user-temporary-directory.md
Created
June 18, 2018 18:52
Per-user temporary directory on Debian
Install package libpam-tmpdir
sudo apt install libpam-tmpdir
At login, the directory /tmp/user/$UID will be created for the user and permissions set such that no other users have access to this directory.
Sources: https://unix.stackexchange.com/questions/192409/per-user-tmpfs-directories/192426#192426
ScriptingSquirrel
/ shrink-raid-array.md
Created
June 13, 2018 19:25
Shrink existing Linux software RAID array
Current state of RAID array:
$ cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md125 : active raid1 sdf4[1] sde4[0] sdg4[2]
1922130944 blocks super 1.2 [3/3] [UUU]
unused devices: <none>
ScriptingSquirrel
/ software-raid.md
Last active
June 6, 2018 15:33
Create Software RAID 1 array on two disks with Debian Linux
Name of the new RAID partition in this example: backup
Partition disk #1 (ata-YOURDISKID/sda in this example):
$ parted --align=optimal /dev/disk/by-id/ata-YOURDISKID
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
ScriptingSquirrel
/ export-node-stats.md
Last active
April 4, 2023 02:18
Setup prometheus-node-exporter and push stats to Pushgateway with cron job
(Assuming a Debian 8-like system)
-
Install
prometheus-node-exporter$ sudo apt update && sudo apt install prometheus-node-exporter -
Configure
prometheus-node-exporterto expose metrics only tolocalhost, not on to all networks. Modify file/etc/default/prometheus-node-exporter:# Set the command-line arguments to pass to the server.
ScriptingSquirrel
/ install-kubernetes-dashboard-ingress-enabled.md
Last active
March 4, 2022 08:48
Install Ingress-enabled kubernetes-dashboard using Helm
$ helm install kubernetes-dashboard stable/kubernetes-dashboard --namespace MY_NAMESPACE --set ingress.enabled=true --set ingress.hosts={MYDASHBOARD.EXAMPLE.COM} --set-string ingress.annotations."nginx\.ingress\.kubernetes\.io/secure-backends"="true"
Error: UPGRADE FAILED: failed to create patch: failed to get versionedObject: unable to convert unstructured object to extensions/v1beta1, Kind=Ingress: unrecognized type: stringNB: A fix for the --set-string flag is on the way: helm/helm#4142