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:lastproofread: 2022-06-10
#########
Container
#########
The VyOS container implementation is based on `Podman<https://podman.io/>` as
a deamonless container engine.
*************
Configuration
*************
.. cfgcmd:: set container name <name> image
Sets the image name in the hub registry
.. code-block:: none
set container name mysql-server image mysql:8.0
If a registry is not specified, Docker.io will be used as the container
registry unless an alternative registry is specified using
**set container registry <name>** or the registry is included in the image name
.. code-block:: none
set container name mysql-server image quay.io/mysql:8.0
.. cfgcmd:: set container name <name> allow-host-networks
Allow host networking in a container. The network stack of the container is
not isolated from the host and will use the host IP.
The following commands translate to "--net host" when the container
is created
.. note:: **allow-host-networks** cannot be used with **network**
.. cfgcmd:: set container name <name> network <networkname>
Attaches user-defined network to a container.
Only one network must be specified and must already exist.
.. cfgcmd:: set container name <name> network <networkname> address <address>
Optionally set a specific static IPv4 or IPv6 address for the container.
This address must be within the named network prefix.
.. note:: The first IP in the container network is reserved by the engine and cannot be used
.. cfgcmd:: set container name <name> description <text>
Set a container description
.. cfgcmd:: set container name <name> environment <key> value <value>
Add custom environment variables.
Multiple environment variables are allowed.
The following commands translate to "-e key=value" when the container
is created.
.. code-block:: none
set container name mysql-server environment MYSQL_DATABASE value 'zabbix'
set container name mysql-server environment MYSQL_USER value 'zabbix'
set container name mysql-server environment MYSQL_PASSWORD value 'zabbix_pwd'
set container name mysql-server environment MYSQL_ROOT_PASSWORD value 'root_pwd'
.. cfgcmd:: set container name <name> port <portname> source <portnumber>
.. cfgcmd:: set container name <name> port <portname> destination <portnumber>
.. cfgcmd:: set container name <name> port <portname> protocol <tcp | udp>
Publish a port for the container.
.. code-block:: none
set container name zabbix-web-nginx-mysql port http source 80
set container name zabbix-web-nginx-mysql port http destination 8080
set container name zabbix-web-nginx-mysql port http protocol tcp
.. cfgcmd:: set container name <name> volume <volumename> source <path>
.. cfgcmd:: set container name <name> volume <volumename> destination <path>
Mount a volume into the container
.. code-block:: none
set container name coredns volume 'corefile' source /config/coredns/Corefile
set container name coredns volume 'corefile' destination /etc/Corefile
.. cfgcmd:: set container name <name> volume <volumename> mode <ro | rw>
Volume is either mounted as rw (read-write - default) or ro (read-only)
.. cfgcmd:: set container name <name> restart [no | on-failure | always]
Set the restart behavior of the container.
- **no**: Do not restart containers on exit
- **on-failure**: Restart containers when they exit with a non-zero exit code, retrying indefinitely (default)
- **always**: Restart containers when they exit, regardless of status, retrying indefinitely
.. cfgcmd:: set container name <name> memory <MB>
Constrain the memory available to the container.
Default is 512 MB. Use 0 MB for unlimited memory.
.. cfgcmd:: set container name <name> device <devicename> source <path>
.. cfgcmd:: set container name <name> device <devicename> destination <path>
Add a host device to the container.
.. cfgcmd:: container name <name> cap-add <text>
Set container capabilities or permissions.
- **net-admin**: Network operations (interface, firewall, routing tables)
- **net-bind-service**: Bind a socket to privileged ports (port numbers less than 1024)
- **net-raw**: Permission to create raw network sockets
- **setpcap**: Capability sets (from bounded or inherited set)
- **sys-admin**: Administation operations (quotactl, mount, sethostname, setdomainame)
- **sys-time**: Permission to set system clock
.. cfgcmd:: set container name <name> disable
Disable a container.
.. cfgcmd:: set container network <networkname>
Creates a named container network
.. cfgcmd:: set container registry <name>
Adds registry to list of unqualified-search-registries. By default, for any
image that does not include the registry in the image name, Vyos will use
docker.io as the container registry.
******************
Operation Commands
******************
.. opcmd:: add container image <containername>
Pull a new image for container
.. opcmd:: show container
Show the list of all active containers.
.. opcmd:: show container image
Show the local container images.
.. opcmd:: show container log <containername>
Show logs from a given container
.. opcmd:: show container network
Show a list available container networks
.. opcmd:: restart container <containername>
Restart a given container
.. opcmd:: update container image <containername>
Update container image
*********************
Example Configuration
*********************
For the sake of demonstration, `example #1 in the official documentation
<https://www.zabbix.com/documentation/current/manual/installation/containers>`_
to the declarative VyOS CLI syntax.
.. code-block:: none
set container network zabbix-net prefix 172.20.0.0/16
set container network zabbix-net description 'Network for Zabbix component containers'
set container name mysql-server image mysql:8.0
set container name mysql-server network zabbix-net
set container name mysql-server environment 'MYSQL_DATABASE' value 'zabbix'
set container name mysql-server environment 'MYSQL_USER' value 'zabbix'
set container name mysql-server environment 'MYSQL_PASSWORD' value 'zabbix_pwd'
set container name mysql-server environment 'MYSQL_ROOT_PASSWORD' value 'root_pwd'
set container name zabbix-java-gateway image zabbix/zabbix-java-gateway:alpine-5.2-latest
set container name zabbix-java-gateway network zabbix-net
set container name zabbix-server-mysql image zabbix/zabbix-server-mysql:alpine-5.2-latest
set container name zabbix-server-mysql network zabbix-net
set container name zabbix-server-mysql environment 'DB_SERVER_HOST' value 'mysql-server'
set container name zabbix-server-mysql environment 'MYSQL_DATABASE' value 'zabbix'
set container name zabbix-server-mysql environment 'MYSQL_USER' value 'zabbix'
set container name zabbix-server-mysql environment 'MYSQL_PASSWORD' value 'zabbix_pwd'
set container name zabbix-server-mysql environment 'MYSQL_ROOT_PASSWORD' value 'root_pwd'
set container name zabbix-server-mysql environment 'ZBX_JAVAGATEWAY' value 'zabbix-java-gateway'
set container name zabbix-server-mysql port zabbix source 10051
set container name zabbix-server-mysql port zabbix destination 10051
set container name zabbix-web-nginx-mysql image zabbix/zabbix-web-nginx-mysql:alpine-5.2-latest
set container name zabbix-web-nginx-mysql network zabbix-net
set container name zabbix-web-nginx-mysql environment 'MYSQL_DATABASE' value 'zabbix'
set container name zabbix-web-nginx-mysql environment 'ZBX_SERVER_HOST' value 'zabbix-server-mysql'
set container name zabbix-web-nginx-mysql environment 'DB_SERVER_HOST' value 'mysql-server'
set container name zabbix-web-nginx-mysql environment 'MYSQL_USER' value 'zabbix'
set container name zabbix-web-nginx-mysql environment 'MYSQL_PASSWORD' value 'zabbix_pwd'
set container name zabbix-web-nginx-mysql environment 'MYSQL_ROOT_PASSWORD' value 'root_pwd'
set container name zabbix-web-nginx-mysql port http source 80
set container name zabbix-web-nginx-mysql port http destination 8080
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