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ubiquiti:controller [2020/09/07 17:01] – niziakubiquiti:controller [2021/03/20 20:41] (current) – niziak
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   * Works correctly only with host type networking = no network separation   * Works correctly only with host type networking = no network separation
  
-===== In unprivileged LXC ===== 
  
-==== Preparation ==== 
- 
-[[https://wiki.debian.org/LXC]] 
- 
-<code bash> 
-apt-get install lxc 
-</code> 
- 
-Create user: 
-<code bash>sudo useradd -s /bin/bash -c 'Unifi lxc user' -m unifi</code> 
-<code bash>sudo passwd unifi</code> 
- 
-Find subuids and subgids for created user 
-<code bash>sudo grep unifi /etc/sub{gid,uid}</code> 
-<code> 
-/etc/subgid:unifi:1738400:65536 
-/etc/subuid:unifi:1738400:65536 
-</code> 
- 
-Allow new user create network interfaces: 
-<file | /etc/lxc/lxc-usernet> 
-unifi veth br-lan 10 
-</file> 
-[[https://linuxcontainers.org/lxc/manpages/man5/lxc-usernet.5.html|man 5 lxc-usernet]] 
- 
-Now login as new user (using ssh or su). 
-Create default lxc configureation in user directory: 
-<code bash> 
-mkdir -p ~/.config/lxc 
-cp /etc/lxc/default.conf ~/.config/lxc/default.conf 
-</code> 
- 
-Edit file below and put subuid and subgid: 
-<file | ~/.config/lxc/default.conf> 
-lxc.include = /etc/lxc/default.conf 
- 
-lxc.idmap = u 0 1738400 65536 
-lxc.idmap = g 0 1738400 65536 
- 
-# "Secure" mounting 
-lxc.mount.auto = proc:mixed sys:ro cgroup:mixed 
- 
-lxc.net.0.type = veth 
-lxc.net.0.link = br-lan 
-lxc.net.0.flags = up 
-lxc.net.0.hwaddr = 00:FF:xx:xx:xx:xx 
- 
-# Disable AppArmor confinement for containers started by non-root 
-# See https://discuss.linuxcontainers.org/t/unprivileged-container-wont-start-cgroups-sysvinit/6766 and 
-# https://discuss.linuxcontainers.org/t/cannot-use-generated-profile-apparmor-parser-not-available/4449 
- 
-lxc.apparmor.profile = unconfined 
-# Unprivileged containers started by ROOT can use lxc.apparmor.profile = generated 
- 
-/var/lib/lxc/ = ~/.local/share/lxc 
-/var/cache/lxc = ~/.cache/lxc 
-</file> 
- 
-Create container: 
-<code bash>lxc-create -t download -n unifi</code> 
-  * Distribution: ''debian'' 
-  * Release: ''stretch'' 
-  * Architecture: ''amd64'' 
- 
-<code bash> 
-lxc-start -n unifi 
-lxc-ls -f 
-NAME  STATE   AUTOSTART GROUPS IPV4 IPV6 UNPRIVILEGED  
-unifi RUNNING 0         -      -    -    true          
-</code> 
- 
-<code bash> 
-cat .ssh/authorized_keys | lxc-attach -n unifi -- /bin/sh -c 'cd /root && mkdir -p .ssh && cat > .ssh/authorized_keys' 
-lxc-attach -n unifi 
-passwd 
-... 
-<CTRL+D> 
-<code> 
- 
-</code bash> 
-lxc-console -n unifi 
-apt-get install openssh-server gnupg2 sudo ca-certificates apt-transport-https wget 
-<CTRL+D> 
-</code> 
- 
-Add autostarting: 
-<file ini ~/.local/share/lxc/unifi/config> 
-lxc.start.auto = 1 
-lxc.start.delay = 5 
-lxc.start.order = 100 
-lxc.group = onboot 
-</code> 
- 
- 
-Edit cron <code bash>crontab -e</code> 
-<file> 
-@reboot /usr/bin/lxc-autostart --all 
-</file> 
- 
- 
- 
-=== Issues === 
- 
-=== lxc-start: unifi: tools/lxc_start.c: main: 329 The container failed to start === 
- 
-<code bash> 
-lxc-start -n unifi -l DEBUG -o debug.log 
-cat debug.log 
- 
-... 
-lxc-start unifi 20200720135645.187 ERROR    start - start.c:print_top_failing_dir:120 - Permission denied - Could not access /home/unifi/.local. Please grant it x access, or add an ACL for the container root 
-... 
- 
-sudo setfacl -m u:1738400:x . .local .local/share 
-</code> 
- 
- 
-=== Error: lxc-create: unifi: confile.c: set_config_net: 261 lxc.net must not have a value === 
- 
-LXC3 is using different config keys. Easiest way is to convert config file: 
-<code bash>lxc-update-config -c default.conf</code> 
- 
-=== lxc-create: unifi: conf.c: chown_mapped_root: 3206 lxc-usernsexec failed: No such file or directory - Failed to open tt === 
-<code bash> 
-sysctl kernel.unprivileged_userns_clone 
-kernel.unprivileged_userns_clone = 0 
- 
-sudo echo "kernel.unprivileged_userns_clone=1" >> /etc/sysctl.conf 
-sysctl -p 
-</code> 
  
 ==== Install MongoDB < 4.0.0 ==== ==== Install MongoDB < 4.0.0 ====