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--- doc:howto:docker_openwrt_image [2014/02/14 16:41]
zoobab2
+++ doc:howto:docker_openwrt_image [2017/07/09 05:07] (current)
burtonrodman [Example Dockerfile]
@@ Line 1: / Line 1: @@
+====== Docker OpenWrt Image ======
+The goal of this document is to run OpenWrt images on [[http://www.docker.io|docker]], a container system based on LXC.
+{{:media:homepage-docker-logo.png|}}
+Import the base image:
+<code>
+$ docker import http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/openwrt-x86-generic-rootfs.tar.gz openwrt-x86-generic-rootfs
+$ docker images
+REPOSITORY                           TAG                   IMAGE ID            CREATED             VIRTUAL SIZE
+openwrt-x86-generic-rootfs           latest                2cebd16f086c        6 minutes ago       5.283 MB
+</code>
+Run a simple cat inside the docker image:
+<code>
+root@turmes /home/zoobab/docker [14]# docker run -i openwrt-x86-generic-rootfs cat /etc/banner
+  _______                     ________        __
+ |       |.-----.-----.-----.|  |  |  |.----.|  |_
+ |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
+ |_______||   __|_____|__|__||________||__|  |____|
+          |__| W I R E L E S S   F R E E D O M
+ -----------------------------------------------------
+ ATTITUDE ADJUSTMENT (12.09, r36088)
+ -----------------------------------------------------
+  * 1/4 oz Vodka      Pour all ingredients into mixing
+  * 1/4 oz Gin        tin with ice, strain into glass.
+  * 1/4 oz Amaretto
+  * 1/4 oz Triple sec
+  * 1/4 oz Peach schnapps
+  * 1/4 oz Sour mix
+  * 1 splash Cranberry juice
+ -----------------------------------------------------
+root@turmes /home/zoobab/docker [15]#
+</code>
+Let's run a basic command:
+<code>
+root@turmes /home/zoobab [17]# docker run -i openwrt-x86-generic-rootfs ifconfig
+eth0      Link encap:Ethernet  HWaddr F2:06:70:1D:D0:65
+          inet addr:172.17.0.30  Bcast:172.17.255.255  Mask:255.255.0.0
+          inet6 addr: fe80::f006:70ff:fe1d:d065/64 Scope:Link
+          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:1000
+          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+lo        Link encap:Local Loopback
+          inet addr:127.0.0.1  Mask:255.0.0.0
+          inet6 addr: ::1/128 Scope:Host
+          UP LOOPBACK RUNNING  MTU:65536  Metric:1
+          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:0
+          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+root@turmes /home/zoobab [18]# docker run -i openwrt-x86-generic-rootfs /sbin/init
+init started: BusyBox v1.19.4 (2013-03-06 20:07:44 UTC)
+sysinit: date: can't set kernel time zone: Operation not permitted
+sysinit: Loading defaults
+sysinit: Loading synflood protection
+sysinit: Adding custom chains
+sysinit: Loading zones
+sysinit: Loading forwardings
+sysinit: Loading rules
+sysinit: Loading redirects
+sysinit: Loading includes
+sysinit: Optimizing conntrack
+sysinit: Loading interfaces
+</code>
+You can also run an interactive shell:
+<code>
+root@turmes /home/zoobab [20]# docker run -i -t openwrt-x86-generic-rootfs /bin/ash
+BusyBox v1.19.4 (2013-03-06 20:07:44 UTC) built-in shell (ash)
+Enter 'help' for a list of built-in commands.
+/ # ps
+  PID USER       VSZ STAT COMMAND
+root      1248 S    /bin/ash
+root      1248 R    ps
+/ #
+</code>
+There seems to be an issue with /var subdirs not created:
+<code>
+/ # ifconfig
+eth0      Link encap:Ethernet  HWaddr 02:51:6F:E7:12:0A
+          inet addr:172.17.0.44  Bcast:172.17.255.255  Mask:255.255.0.0
+          inet6 addr: fe80::51:6fff:fee7:120a/64 Scope:Link
+          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+          RX packets:25 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:1000
+          RX bytes:15551 (15.1 KiB)  TX bytes:648 (648.0 B)
+lo        Link encap:Local Loopback
+          inet addr:127.0.0.1  Mask:255.0.0.0
+          inet6 addr: ::1/128 Scope:Host
+          UP LOOPBACK RUNNING  MTU:65536  Metric:1
+          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:0
+          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+/ # opkg update
+Collected errors:
+ * opkg_conf_load: Could not create lock file /var/lock/opkg.lock: No such file or directory.
+/ # mkdir -p /var/lock
+/ # ls
+bin      dev      etc      lib      mnt      overlay  proc     rom      root     sbin     sys      tmp      usr      var      www
+/ # opkg update
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/Packages.gz.
+Updated list of available packages in /var/opkg-lists/attitude_adjustment.
+/ #
+</code>
+Let's change the root password and try to setup dropbear to connect over ssh:
+<code>
+/ # passwd
+Changing password for root
+New password:
+Bad password: too weak
+Retype password:
+Password for root changed by root
+/ # ps
+  PID USER       VSZ STAT COMMAND
+root      1252 S    /bin/ash
+root      1248 R    ps
+/ # /etc/init.d/dropbear restart
+/ # ps
+  PID USER       VSZ STAT COMMAND
+root      1260 S    /bin/ash
+root       960 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -p 22
+root      1248 R    ps
+/ #
+</code>
+Leave the console OPENED, and in another terminal, try to SSH to the IP address:
+<code>
+zoobab@turmes /home/zoobab [2]$ ssh root@172.17.0.45
+root@172.17.0.45's password:
+BusyBox v1.19.4 (2013-03-06 20:07:44 UTC) built-in shell (ash)
+Enter 'help' for a list of built-in commands.
+  _______                     ________        __
+ |       |.-----.-----.-----.|  |  |  |.----.|  |_
+ |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
+ |_______||   __|_____|__|__||________||__|  |____|
+          |__| W I R E L E S S   F R E E D O M
+ -----------------------------------------------------
+ ATTITUDE ADJUSTMENT (12.09, r36088)
+ -----------------------------------------------------
+  * 1/4 oz Vodka      Pour all ingredients into mixing
+  * 1/4 oz Gin        tin with ice, strain into glass.
+  * 1/4 oz Amaretto
+  * 1/4 oz Triple sec
+  * 1/4 oz Peach schnapps
+  * 1/4 oz Sour mix
+  * 1 splash Cranberry juice
+ -----------------------------------------------------
+root@17691dbb9d9a:~#
+</code<
+Now let's install one package:
+<code>
+root@17691dbb9d9a:~# opkg update
+Collected errors:
+ * opkg_conf_load: Could not create lock file /var/lock/opkg.lock: No such file or directory.
+root@17691dbb9d9a:~# mkdir /var/lock
+root@17691dbb9d9a:~# opkg update
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/Packages.gz.
+Updated list of available packages in /var/opkg-lists/attitude_adjustment.
+root@17691dbb9d9a:~# opkg install
+root@17691dbb9d9a:~# ps
+  PID USER       VSZ STAT COMMAND
+root      1260 S    /bin/ash
+root       960 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -p 22
+root      1032 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -p 22
+root      1256 S    -ash
+root      1248 R    ps
+root@17691dbb9d9a:~# opkg install lighttpd
+Installing lighttpd (1.4.30-2) to root...
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/lighttpd_1.4.30-2_x86.ipk.
+Installing libopenssl (1.0.1e-1) to root...
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/libopenssl_1.0.1e-1_x86.ipk.
+Installing zlib (1.2.7-1) to root...
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/zlib_1.2.7-1_x86.ipk.
+Installing libpcre (8.11-2) to root...
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/libpcre_8.11-2_x86.ipk.
+Installing libpthread (0.9.33.2-1) to root...
+Downloading http://downloads.openwrt.org/attitude_adjustment/12.09/x86/generic/packages/libpthread_0.9.33.2-1_x86.ipk.
+Configuring libpthread.
+Configuring libpcre.
+Configuring zlib.
+Configuring libopenssl.
+Configuring lighttpd.
+root@17691dbb9d9a:~#
+</code>
+I published a docker image:
+<code>
+docker pull  zoobab/openwrt-x86-attitude
+</code>
+Example to get a shell:
+<code>
+root@turmes /home/zoobab [4]# docker run -i -t zoobab/openwrt-x86-attitude /bin/ash
+BusyBox v1.19.4 (2013-03-06 20:07:44 UTC) built-in shell (ash)
+Enter 'help' for a list of built-in commands.
+/ # ls
+bin      dev      etc      lib      mnt      overlay  proc     rom      root     sbin     sys      tmp      usr      var      www
+/ # ifconfig
+eth0      Link encap:Ethernet  HWaddr E6:7A:80:85:59:68
+          inet addr:172.17.0.46  Bcast:172.17.255.255  Mask:255.255.0.0
+          inet6 addr: fe80::e47a:80ff:fe85:5968/64 Scope:Link
+          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:1000
+          RX bytes:7069 (6.9 KiB)  TX bytes:328 (328.0 B)
+lo        Link encap:Local Loopback
+          inet addr:127.0.0.1  Mask:255.0.0.0
+          inet6 addr: ::1/128 Scope:Host
+          UP LOOPBACK RUNNING  MTU:65536  Metric:1
+          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:0
+          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+/ #
+</code>
+====== Todolist ======
+  * Fix /sbin/init to get the openwrt banner and shell at the end?
+  * Fix the /var entries: mkdir /var/run && mkdir /var/lock
+  * Change the build to generate some images with dev entries
+  * Get the LUCI web interface to work
+  * publish more images with x64 and/or x32 arch
+  * publish images with a different arch via qemu (http://dktrkranz.wordpress.com/2013/11/19/cross-architecture-linux-containers-in-debian/)
+  * publish images with interesting profiles (lighttpd dirlist server, ftpd server, ircd server, tor server, etc...)
+====== Links ======
+  * https://hub.docker.com/r/zoobab/openwrt-15.05.1-x86-64-rootfs/
+====== Example Dockerfile ======
+Note the use of "exec format" for the CMD which properly makes /sbin/init proc 1 and boots all services (fixing many issues).
+<code>
+FROM scratch
+ADD https://downloads.openwrt.org/chaos_calmer/15.05/x86/generic/openwrt-15.05-x86-generic-Generic-rootfs.tar.gz /
+EXPOSE 80
+RUN mkdir /var/lock && \
+    opkg update && \
+    opkg install uhttpd-mod-lua && \
+    uci set uhttpd.main.interpreter='.lua=/usr/bin/lua' && \
+    uci commit uhttpd
+USER root
+# using exec format so that /sbin/init is proc 1 (see procd docs)
+CMD ["/sbin/init"]
+</code>

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