Glad you have found a way to make it working. here is step I followed.

1. I labeled node-01 as 'dbserver: mysql'
2. create the docker image in node-01
3. created this pod, it worked.

apiVersion: v1 kind: ReplicationController metadata:   name: wildfly-rc spec:   replicas: 2   template:
    metadata:
      labels:
        app: wildfly-rc-pod
    spec:
      containers:
      - name: wildfly
        image: nbasetty/wildfly-server
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 8080
      nodeSelector:
        dbserver: mysql

Re-creating the issue:

docker pull jboss/wildfly

mkdir jw
cd jw
echo 'FROM jboss/wildfly
RUN /opt/jboss/wildfly/bin/add-user.sh admin admin123$ --silent
CMD ["/opt/jboss/wildfly/bin/standalone.sh", "-b", "0.0.0.0", "-bmanagement", "0.0.0.0"]' | tee Dockerfile

docker build --tag=docker.io/surajd/wildfly-server .

See the images available:

# docker images
REPOSITORY                                               TAG                 IMAGE ID            CREATED             SIZE
docker.io/surajd/wildfly-server                          latest              10e96902ea12        11 seconds ago      583.8 MB

Create a config that works:

echo '
apiVersion: v1
kind: Service
metadata:
  name: wildfly
spec:
  selector:
    app: wildfly
  ports:
  - name: web
    port: 8080
  type: LoadBalancer
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: wildfly
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: wildfly
    spec:
      containers:
      - name: wildfly
        image: docker.io/surajd/wildfly-server
        imagePullPolicy: Never
        ports:
        - containerPort: 8080
' | tee config.yaml
kubectl create -f config.yaml

Notice the field imagePullPolicy: Never, this helps you use the image available on the node(the image we built using docker build). This works on single node cluster but may or may not work on multiple node cluster. So not recommended to put that value, but since we are doing experiment on single node cluster we can set it to Never. Always set it to imagePullPolicy: Always. So that whenever the pod is scheduled the image will be pulled from registry. Read about imagePullPolicy and some config related tips.

Now to pull the image from registry the image should be on registry, so to answer your question of pushing it to docker hub run command:

docker push docker.io/surajd/wildfly-server

So in the above example replace surajd with your docker registry username.

Here are steps I used to do setup of single node cluster on CentOS:

My machine version:

$ cat /etc/redhat-release 
CentOS Linux release 7.3.1611 (Core)

Here is what I have done:

Setup single node k8s cluster on CentOS as follows (src1 & src2):

yum update -y
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
        https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
setenforce 0
yum install -y docker kubelet kubeadm kubectl kubernetes-cni
systemctl enable docker && systemctl start docker
systemctl enable kubelet && systemctl start kubelet

sysctl net.bridge.bridge-nf-call-iptables=1
sysctl net.bridge.bridge-nf-call-ip6tables=1
kubeadm init


cp /etc/kubernetes/admin.conf $HOME/
chown $(id -u):$(id -g) $HOME/admin.conf
export KUBECONFIG=$HOME/admin.conf

kubectl taint nodes --all node-role.kubernetes.io/master-

Now k8s version:

# kubectl version
Client Version: version.Info{Major:"1", Minor:"6", GitVersion:"v1.6.4", GitCommit:"d6f433224538d4f9ca2f7ae19b252e6fcb66a3ae", GitTreeState:"clean", BuildDate:"2017-05-19T18:44:27Z", GoVersion:"go1.7.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"6", GitVersion:"v1.6.4", GitCommit:"d6f433224538d4f9ca2f7ae19b252e6fcb66a3ae", GitTreeState:"clean", BuildDate:"2017-05-19T18:33:17Z", GoVersion:"go1.7.5", Compiler:"gc", Platform:"linux/amd64"}