Initial k8s support in libplayground (#216)

* Initial k8s support in libplayground

* Make tasks never give up + custom event for k8s cluster status

dockerfiles/k8s/Dockerfile

@@ -0,0 +1,32 @@
+FROM centos:7
+
+COPY ./systemctl /usr/bin/systemctl
+COPY ./kubernetes.repo /etc/yum.repos.d/
+
+
+
+RUN yum install -y kubelet kubeadm \
+    && mv -f /etc/systemd/system/kubelet.service.d/10-kubeadm.conf /etc/systemd/system/kubelet.service \
+    && yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo \
+    && yum install -y docker-ce \
+    && sed -i -e '4d;5d;8d' /lib/systemd/system/docker.service \
+    && yum clean all
+
+RUN curl -Lf -o jq https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64 \
+    && chmod +x ./jq && mv jq /usr/bin
+
+COPY ./kube* /etc/systemd/system/
+COPY ./wrapkubeadm.sh /usr/local/bin/kubeadm
+COPY ./tokens.csv /etc/pki/tokens.csv
+COPY ./daemon.json /etc/docker/
+
+COPY motd /etc/motd
+
+RUN echo $'cat /etc/motd \n\
+export PS1="[\h \W]$ "' >> /root/.bash_profile
+
+RUN mkdir -p /root/.kube && ln -s /etc/kubernetes/admin.conf /root/.kube/config \
+    && rm -f /etc/machine-id
+
+CMD systemctl start docker && systemctl start kubelet \
+    && while true; do bash -l; done