docker: add initial dockerfile and docs

Signed-off-by: Juraj Vijtiuk <[email protected]>

README.md

@@ -13,6 +13,7 @@ These include pthreads and the libnl (https://www.infradead.org/~tgr/libnl/) net
 
 This section describes how to build the plugin on hosts that have Sysrepo installed. This
 includes standard Linux machines and docker images with Sysrepo, Netopeer and other required dependencies.
+Additionally, a Dockerfile that builds all the dependencies and the plugin is available in `docker/`
 
 First, clone the repo:
 ```

docker/Dockerfile

@@ -0,0 +1,34 @@
+# syntax=docker/dockerfile:1.0.0-experimental
+FROM sysrepo/sysrepo-netopeer2:latest
+
+MAINTAINER [email protected]
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y\
+	ssh \
+	libnl-3-dev \
+	libnl-route-3-dev \
+	libnl-nf-3-dev \
+	libnl-genl-3-dev
+
+WORKDIR /opt/dev
+
+RUN \
+	mkdir -m 0600 -p /root/.ssh && ssh-keyscan lab.sartura.hr >> ~/.ssh/known_hosts
+
+RUN \
+	--mount=type=secret,id=sshkey,dst=/root/.ssh/id_ed25519 git clone [email protected]:sysrepo/sysrepo-plugin-interfaces.git
+
+Run \
+	cd sysrepo-plugin-interfaces && mkdir build && cd build && \
+	git checkout master && \
+	cmake -DCMAKE_BUILD_TYPE="Debug" .. && \
+	make -j2
+
+RUN \
+	sysrepoctl -i /opt/dev/sysrepo-plugin-interfaces/yang/[email protected] && \
+	sysrepoctl -i /opt/dev/sysrepo-plugin-interfaces/yang/[email protected] && \
+	sysrepoctl -i /opt/dev/sysrepo-plugin-interfaces/yang/[email protected] && \
+	sysrepoctl -i /opt/dev/sysrepo-plugin-interfaces/yang/ieee802-dot1q-types.yang && \
+	sysrepoctl -i /opt/dev/sysrepo-plugin-interfaces/yang/[email protected]

docker/README.md

@@ -0,0 +1,20 @@
+# build
+As the plugin is currently not open source, we need to clone from a private git server.
+
+To do that, docker buildkit is required, and a private SSH key
+with access to the plugin repo needs to be passed at build time.
+
+```
+$ export DOCKER_BUILDKIT=1
+$ docker build --progress=plain --secret id=sshkey,src=/home/user/.ssh/id_ed25519 -t sysrepo/interfaces-plugin -f Dockerfile .
+```
+
+# run
+Since the plugin depends on systemd, we need to run the container with `CAP_SYS_ADMIN` privileges and mount the
+cgroups FS within the container.
+
+```
+docker run -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro --cap-add SYS_ADMIN --name interfaces-plugin sysrepo/interfaces-plugin /sbin/init
+```
+
+