Catagorized Notes

Renamed notes to fit categories and be easier to find later: blog, config, howto
2023-04-28 10:31:11 -04:00
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+# LXD/LXC cheat sheet
+
+I've installed LXD on my home server and have found a lot of syntax and one-liners that I've yet to commit to memory.  So I'll put them here.
+
+## Install LXD
+
+```shell
+snap install lxd  
+sudo apt install -y git build-essential libssl-dev python3-venv python3-pip python3-dev zfsutils-linux bridge-utils
+```
+
+## General links
+
+* [How to initialize LXD again](https://blog.simos.info/how-to-initialize-lxd-again/)
+
+## Install lxdMosaic
+
+[link](https://github.com/turtle0x1/LxdMosaic)
+
+```shell
+# Launch an ubuntu container
+lxc launch ubuntu: lxdMosaic
+# Connect to ubuntu console
+lxc exec lxdMosaic bash
+# Download the script
+curl https://raw.githubusercontent.com/turtle0x1/LxdMosaic/master/examples/install_with_clone.sh >> installLxdMosaic.sh
+# Then give the script execution permissions
+chmod +x installLxdMosaic.sh
+# Then execute the script
+./installLxdMosaic.sh
+```
+
+## Create zsf pool image file and add it to lxc
+
+```shell
+# bs = blocksize, count = number of blocks
+
+# create the image file - 250GB
+dd if=/dev/zero of=/mnt/data1/overlook-zfs-pool02 bs=1GB count=250
+# Create the loop device (check `df -h` first for available names)
+sudo losetup /dev/loop6 /mnt/data1/overlook-zfs-pool02
+# Create zfs pool
+sudo zpool create overlook-zfs-pool02 /dev/loop6
+# View existing zpool list
+zpool list
+# Add new zpool to lxc storage
+lxc storage create overlook-zfs-pool02 zfs source=overlook-zfs-pool02
+```
+
+* [block sizes and multiples](https://www.linuxnix.com/what-you-should-know-about-linux-dd-command/)
+* [How to use a file as a zpool](https://serverfault.com/questions/583733/how-to-use-a-file-as-a-zpool)
+
+## How to move containers to a new storage pool on the same host
+
+[link](https://discuss.linuxcontainers.org/t/how-to-move-containers-to-a-new-storage-pool-on-the-same-host/2798)
+
+```shell
+lxc stop container_name
+lxc move container_name temp_container_name -s new_storage_pool
+lxc move temp_container_name container_name
+lxc start container_name
+```
+
+## Changing existing containers to use the bridge profile
+
+Suppose we have an existing container that was created with the default profile, and got the LXD NAT network. Can we switch it to use the bridge profile?
+
+Here is the existing container.
+
+```shell
+lxc launch ubuntu:x mycontainer
+
+Creating mycontainerStarting mycontainer
+```
+
+Let’s assign mycontainer to use the new profile "bridgeprofile".
+
+```shell
+lxc profile assign mycontainer bridgeprofile
+```
+
+Now we just need to restart the networking in the container.
+
+```shell
+lxc exec mycontainer -- systemctl restart networking.service
+```
+
+* [Change lxc profile for container](https://blog.simos.info/how-to-make-your-lxd-containers-get-ip-addresses-from-your-lan-using-a-bridge/)
+
+
+## /etc/netplan/ for containers
+
+```shell
+network:
+    ethernets:
+        eth0:
+            addresses:
+            - 192.168.0.206/24
+            gateway4: 192.168.0.1
+            nameservers:
+              addresses: [ 1.1.1.1, 8.8.8.8 ]
+    version: 2
+```
+
+## backup (export) containers to a file
+```shell
+bdate=$(date +"%Y-%m-%d") && for ct in $(lxc list -c n --format csv); do lxc export $ct /mnt/data2/container-backup/$bdate-$ct.tgz; done
+```
+
+## restore container from backup
+```
+lxc import <path>/<backup-archive>.tgz
+```