====== HA in Proxmox LXC ======

NOT WORKING!

====== Prepare CT ======

===== Create CT =====
  * Hostname: ''hassio''
  * Template: ''debian-10-standard..''
  * Root Disk:
    * Storage: ''local-zfs'' 
    * Disk size (GiB): ''2''
    * Mount optionas: ''noatime''
  * CPU: 1
  * Memory:
    * Memory (MiB): 512
    * Swap (MiB): 512

===== Options =====
  * Unprivileged container: ''Yes''
  * Features: ''Nesting'', ''keyctl'' (needed to run Docker in unprivileged container)

===== Resources =====
Docker cannot use features of ZFS filesystem and it failsback to very inefficient ''vfs'' storage driver.
To workaround, Docker needs well supported filesystem.
  * Add
    * Mountpoint
      * Storage: ''local'' (DIR type storage, to emulate any block device in file)
      * Disk size (GiB): ''2''
      * Path: ''/var/lib/docker''
      * Mount options: ''noatime''



===== Host shell =====
Modify CT config:
<file /etc/pve/nodes/pve1/lxc/111.conf>
lxc.cgroup.devices.allow: a
lxc.cap.drop:
</file>


====== Install HA ======

<code bash>
apt-get update && apt-get dist-upgrade
reboot

apt-get install curl network-manager apparmor jq
curl -sSL https://get.docker.com | bash 

# Downgrade docker
apt-get install docker-ce=5:18.09.9~3-0~debian-buster
apt-get install docker-ce-cli=5:18.09.9~3-0~debian-buster
echo "docker-ce hold" | dpkg --set-selections
echo "docker-ce-cli hold" | dpkg --set-selections
</code>

<code bash>
curl -sL https://raw.githubusercontent.com/home-assistant/supervised-installer/master/installer.sh | bash -s -- -m qemux86-64
</code>

====== issue ======

===== container init caused "write sysctl key kernel.domainname: open /proc/sys/kernel/domainname: permission denied"": unknown") =====

<code bash>
apt-get install docker-ce=5:18.09.9~3-0~debian-buster
apt-get install docker-ce-cli=5:18.09.9~3-0~debian-buster
echo "docker-ce hold" | dpkg --set-selections
echo "docker-ce-cli hold" | dpkg --set-selections
</code>