Support a containerized node

Add OPENSHIFT_CONTAINERIZED=true to trigger this mode, fixes docker
config file.

images/base/Dockerfile

@@ -7,5 +7,5 @@
 FROM centos:centos7
 
 # components from EPEL must be installed in a separate yum install step
-RUN yum install -y git tar wget socat hostname epel-release && \
+RUN yum install -y git tar wget socat hostname sysvinit-tools util-linux epel-release && \
     yum clean all

images/origin/Dockerfile

@@ -13,12 +13,14 @@ RUN ln -s /usr/bin/openshift /usr/bin/oc && \
     ln -s /usr/bin/openshift /usr/bin/oadm && \
     ln -s /usr/bin/openshift /usr/bin/osc && \
     ln -s /usr/bin/openshift /usr/bin/osadm && \
+    ln -s /usr/bin/openshift /usr/bin/kubectl && \
     ln -s /usr/bin/openshift /usr/bin/openshift-deploy && \
     ln -s /usr/bin/openshift /usr/bin/openshift-docker-build && \
     ln -s /usr/bin/openshift /usr/bin/openshift-sti-build && \
     ln -s /usr/bin/openshift /usr/bin/openshift-router
 
 ENV HOME /root
+ENV OPENSHIFT_CONTAINERIZED true
 ENV KUBECONFIG /var/lib/openshift/openshift.local.config/master/admin.kubeconfig
 WORKDIR /var/lib/openshift
 ENTRYPOINT ["/usr/bin/openshift"]

pkg/cmd/server/kubernetes/node_config.go

@@ -17,6 +17,7 @@ import (
 	"github.com/golang/glog"
 
 	configapi "github.com/openshift/origin/pkg/cmd/server/api"
+	cmdutil "github.com/openshift/origin/pkg/cmd/util"
 	cmdflags "github.com/openshift/origin/pkg/cmd/util/flags"
 	"github.com/openshift/origin/pkg/cmd/util/variable"
 )
@@ -120,6 +121,10 @@ func BuildKubernetesNodeConfig(options configapi.NodeConfig) (*NodeConfig, error
 	server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
 	server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
 
+	if value := cmdutil.Env("OPENSHIFT_CONTAINERIZED", ""); len(value) > 0 {
+		server.Containerized = value == "true"
+	}
+
 	// resolve extended arguments
 	// TODO: this should be done in config validation (along with the above) so we can provide
 	// proper errors