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--- docs:guide-user:virtualization:lxc [2019/05/07 14:22] – created aparcar1
+++ docs:guide-user:virtualization:lxc [2024/07/28 00:56] (current) – Grammar and spelling memicinn19
@@ Line 1: / Line 1: @@
-OpenWrt in LXC containers
+====== OpenWrt in LXC containers ======
-OpenWrt can run inside a LXC container, using the same kernel as running on the host system. This can be useful for development as well as for VM hosting.
+OpenWrt can run inside an LXC container, using the same kernel as running on the host system. This can be useful for development as well as for VM hosting.
-The following gives a rough idea on how to get thing up and running. Before anything, install LXC on the host machine and make sure it supports running unprivileged containers.
+===== Privileged vs Unprivileged =====
-There is currently no template for OpenWrt available, so some manual steps are required.
+Consult your distro for up to date instructions of the setup of either HostOS functionality.
-  * Unordered List ItemCreate the VM folder manually at ''.local/share/lxc/<vm-name>/''.
-  * Download a snapshot rootfs of OpenWrt and unpack it to ''.local/share/lxc/<vm-name>/rootfs''
-  * Create a ''.local/share/lxc/<vm-name>/config'' containing the following content:
-''
+===== Basic Overview =====
+The following gives a rough idea on how to get things up and running. Before anything, install LXC on the host machine and make sure it supports running unprivileged containers. You will likely also need bridge functionality and/or additional underlying related subsystems (macvlan, etc.) if used.
+==== Installing via image ====
+For some (//amd64//, //arm//...) architectures, the //download// template allows to retrieve an OpenWrt image from the [[https://images.linuxcontainers.org/|remote mirror]].
+To create the OpenWrt container, just do:
+<code>lxc-create -n <container_name> -t download -- -d openwrt -a amd64</code>
+and spell the release you want to install when asked to. For any error related to fetching the GPG key, just specify a different keyserver (e.g. keyserver.ubuntu.com) by either setting ''DOWNLOAD_KEYSERVER'' or appending the ''--keyserver'' option.
+The container will be created according to your default LXC config files (unless you use ''--config'' to specify a different config), so you may probably want to customize it further (e.g. add network interfaces or mount points) by modifying the final config in the container directory (see //lxc.container.conf(5)// man page). Depending on your setup, you may need to ''attach'' and temporarily give a fixed IP address to the relevant interface in order to establish the first connection.
+=== Upgrading to the latest release ===
+Once a new release becomes available, as announced by the OpenWrt team, you can install and migrate to it:
+  - install the new release image as above (it will typically be available within the next day)
+  - replace the new container's config file with the old one (remember to edit relevant options if needed e.g. the rootfs path, the host name, the autostart flag...)
+  - backup the settings of the currently running OpenWrt as you would usually do, and shut it down
+  - start the new container and, if it's safe to do so (as it usually is for minor releases), restore OpenWrt settings from backup
+Note: if you are still getting the previous image after more than 24h since the new release (images are currently built daily by lxc), chances are an old cached image is being used. In this case, you can delete the old image by appending the ''--flush-cache'' option to the command.
+==== Installing via rootfs extraction ====
+For all other architectures, some manual steps are required:
+  - Create the VM folder manually at ''.local/share/lxc/<vm-name>/''
+  - Download a snapshot rootfs of OpenWrt and unpack it to ''.local/share/lxc/<vm-name>/rootfs''
+  - Create a ''.local/share/lxc/<vm-name>/config'' containing the following content:\\ <code>
 lxc.include = /etc/lxc/default.conf
 lxc.include = /usr/share/lxc/config/common.conf
@@ Line 32: / Line 53: @@
 # adapt <user> and <vm-name>
 lxc.rootfs.path = dir:/home/<user>/.local/share/lxc/<vm-name>/rootfs
+</code>
-''
+  - run ''chmod'' on the rootfs folder with the id you obtained earlier
+  - run ''lxc-start -n <vm-name>''
-  * run ''chmod'' on the rootfs folder with the id you obtained earlier
+  - run ''lxc-attach -n <vm-name>''
-  * run ''lxc-start -n <vm-name>''