Lxc
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Inhaltsverzeichnis
LXC Notizen
Host Allgemein
Passwort im Container setzen
Passwörter können vom Host aus bequem mit chroot gesetzt werden
cd /var/lib/lxc/CONTAINER
chroot rootfs /bin/bash
passwd
Container Allgemein
Die Netzwerkeinstellungen und der Hostname des Containers können automatischüber die config erzeugt werden Im Container:
rm /etc/network/interfaces
rm /etc/hostname
In der Containerconfig:
vim /var/lib/lxc/CONTAINER/config
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = lxcbr0 # Unter Debian benutzen wir br0
lxc.network.hwaddr = XX:XX:XX:XX:XX:XX
lxc.network.ipv4 = XXX.XXX.XXX.XXX/32 # IP des Containers
lxc.network.ipv4.gateway = XXX.XXX.XXX.XXX # IP des Hosts
Host Debian
Host Ubuntu 14.04
Container mit Systemd starten
Anpassen der Config des Containers
Fehlermeldung verursacht von Apparmor:
Failed to mount cgroup at /sys/fs/cgroup/systemd: Permission denied
vim /var/lib/lxc/CONTAINER/config
lxc.kmsg = 0
lxc.aa_profile = unconfined
Installation eines Containers
cd /var/lib/lxc
lxc-create -t download -n ncphp73 -- --dist ubuntu --release bionic --arch amd64
cp /var/lib/lxc/ncphp73/config /var/lib/lxc/ncphp73/config.original20190418
vim /var/lib/lxc/ncphp73/config
lxc-ls -f
lxc-start -n ncphp73
lxc-ls -f
lxc-attach -n ncphp73
Konfiguration
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
vim /etc/bash.bashrc
# bash-completion auskommentieren
Installation von Software
apt-get update
apt-get install wget bash-completion zip unzip rsync openssh-server openssh-sftp-server
Ex-Kurs apache mit php 7.3
apt-get install software-properties-common
add-apt-repository ppa:ondrej/php
add-apt-repository ppa:ondrej/apache2
apt-get update
apt-get install php7.3 php7.3-cli php7.3-common
apt-get install imagemagick apache2 libapache2-mod-php7.3 php7.3-cli php7.3 php7.3-common php7.3-imap php7.3-intl php7.3-mysql php7.3-readline php7.3-soap php7.3-zip php7.3-zip php7.3-gd php7.3-xml php7.3-gd php7.3-json php7.3-opcache php-imagick php7.3-curl php7.3-mbstring php7.3-bcmath php7.3-gmp php7.3-zip composer php7.3-curl php7.3-dev php7.3-gd php7.3-mbstring php7.3-zip php7.3-mysql php7.3-xml php7.3-fpm libapache2-mod-php7.3 php7.3-imagick php7.3-recode php7.3-tidy php7.3-xmlrpc php7.3-intl mysql-server-5.7 phpmyadmin apache2-utils
Konfiguration von Software
a2enmod ssl
systemctl restart apache2
LXC Probleme
apparmor in lxc3
Lösung in LXC Host
vim /var/lib/lxc/anc_ox/config
# folgendes muss rein
lxc.apparmor.profile = generated
lxc.apparmor.allow_nesting = 1
apache
- Fehlermeldung
systemctl status apache2.service
● apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2019-12-18 14:58:03 UTC; 1min 19s ago
Docs: https://httpd.apache.org/docs/2.4/
Process: 204 ExecStart=/usr/sbin/apachectl start (code=exited, status=226/NAMESPACE)
Dec 18 14:58:03 ancox systemd[1]: Starting The Apache HTTP Server...
Dec 18 14:58:03 ancox systemd[204]: apache2.service: Failed to set up mount namespacing: Perm
ission denied
Dec 18 14:58:03 ancox systemd[204]: apache2.service: Failed at step NAMESPACE spawning /usr/s
bin/apachectl: Permission denied
Dec 18 14:58:03 ancox systemd[1]: apache2.service: Control process exited, code=exited, statu
s=226/NAMESPACE
Dec 18 14:58:03 ancox systemd[1]: apache2.service: Failed with result 'exit-code'.
Dec 18 14:58:03 ancox systemd[1]: Failed to start The Apache HTTP Server.
- Lösung im Lxc Container
vim /etc/systemd/system/multi-user.target.wants/apache2.service
PrivateTmp=true #aus kommentieren
systemctl daemon-reload
systemctl restart apache2.service
- Lösung in LXC Host
siehe oben lxc#Lösung in LXC Host
mariadb
- Fehlermeldung
systemctl status mariadb.service
● mariadb.service - MariaDB 10.3.18 database server
Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2019-12-18 15:04:01 UTC; 5s ago
Docs: man:mysqld(8)
https://mariadb.com/kb/en/library/systemd/
Process: 211 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=
226/NAMESPACE)
Dec 18 15:04:01 ancox systemd[1]: Starting MariaDB 10.3.18 database server...
Dec 18 15:04:01 ancox systemd[211]: mariadb.service: Failed to set up mount namespacing: Perm
ission denied
Dec 18 15:04:01 ancox systemd[211]: mariadb.service: Failed at step NAMESPACE spawning /usr/b
in/install: Permission denied
Dec 18 15:04:01 ancox systemd[1]: mariadb.service: Control process exited, code=exited, statu
s=226/NAMESPACE
Dec 18 15:04:01 ancox systemd[1]: mariadb.service: Failed with result 'exit-code'.
Dec 18 15:04:01 ancox systemd[1]: Failed to start MariaDB 10.3.18 database server.
- Lösung im Lxc Container
vim /etc/systemd/system/multi-user.target.wants/mariadb.service
# folgendes erstmal auskommentieren
# ProtectSystem=full
# PrivateDevices=true
# ProtectHome=true
- Lösung in LXC Host
siehe oben lxc#Lösung in LXC Host
