k8smaker_addworker_aws

#!/bin/bash

if [[ $(whoami) = "root" ]]; then
   echo "Must not run as root."
   exit 1
fi

source ./k8smaker_config

if [[ $1 = '' ]]; then
   echo "Pass IP or hostname of the new worker node as the first argument:"
   echo "./k8smaker_addworker worker1.local"
   exit 1
fi

mkdir -p ~/"$CLUSTERNAME"
ADDSCRIPT=~/"$CLUSTERNAME/k8smaker_addworker_$1"
KUBEADMSCRIPT=~/"$CLUSTERNAME/k8smaker_addworker_$1_join.yaml"

# this picks up your external facing IP address and hostname
echo "Worker is $SSHUSERNAME@$1"
echo "Script stored in $ADDSCRIPT"

# Delete an existing k8s install while leaving Docker alone.  Doesn't get rid of all the extra things we did, but those aren't harmful to reinstalling.
echo "You have 5 seconds before this script remotely deletes all Kubernetes and Etcd data.  Control-C To Abort!"
sleep 5

# configure us to be able to login remotely without a password
ssh-copy-id -f -i "$HOME/.ssh/$CLUSTERNAME.pub" "$SSHUSERNAME"@"$1"

# generate the script we want to run on the remote machine
echo "#!/bin/bash" >"$ADDSCRIPT"
cat ./k8smaker_config >>"$ADDSCRIPT"
echo '# AWS nodes must have $(hostname) == $(hostname -f) because somewhere in the middle of initialization, someone is using the short name, and it blows up.' >>"$ADDSCRIPT"
echo 'sudo hostnamectl set-hostname $(curl -s http://169.254.169.254/latest/meta-data/local-hostname)' >>"$ADDSCRIPT"
cat ./k8smaker_precondition >>"$ADDSCRIPT"
echo "sudo usermod -aG docker $SSHUSERNAME" >>"$ADDSCRIPT"
echo "mkdir -p ~/.kube" >>"$ADDSCRIPT"
DISCOVERYTOKEN=$(openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //')
echo "sudo -i kubeadm join --config=/home/$SSHUSERNAME/k8smaker_addworker_$1_join.yaml" >>"$ADDSCRIPT"
chmod a+x "$ADDSCRIPT"

# Generate the kubeadm join script and copy it to the remote machine
cat >"$KUBEADMSCRIPT" <<EOF
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: JoinConfiguration
caCertPath: /etc/kubernetes/pki/ca.crt
discovery:
  bootstrapToken:
    token: ${BOOTSTRAPTOKEN}
    apiServerEndpoint: "${CONTROLPLANEENDPOINT}:6443"
    caCertHashes: ["sha256:${DISCOVERYTOKEN}"]
  timeout: 5m0s
  tlsBootstrapToken: ${BOOTSTRAPTOKEN}
nodeRegistration:
  kubeletExtraArgs:
    cloud-provider: aws
EOF

# copy the scripts to the new node and run it
scp -i "$HOME/.ssh/$CLUSTERNAME" "$ADDSCRIPT" "$SSHUSERNAME"@"$1":~/"k8smaker_addworker_$1"
scp -i "$HOME/.ssh/$CLUSTERNAME" "$KUBEADMSCRIPT" "$SSHUSERNAME"@"$1":~/"k8smaker_addworker_$1_join.yaml"
ssh -t -i "$HOME/.ssh/$CLUSTERNAME" "$SSHUSERNAME"@"$1" ~/"k8smaker_addworker_$1"

# Configure kubectl for each worker node
scp -i "$HOME/.ssh/$CLUSTERNAME" ~/.kube/config "$SSHUSERNAME"@"$1":~/.kube/config

# give the new node the role of 'worker'
kubectl label nodes "$1" --overwrite "node-role.kubernetes.io/worker="