How to use heredoc inside my ssh command

0 votes
0 answers
837 views
                          I have a bash script that connects to a remote machine via SSH and runs a series of commands. 

It seems that the heredoc within the outer script is not aligning properly, and I keep getting an error.

    -bash: line 49: warning: here-document at line 6 delimited by end-of-file (wanted `MOD')

This is the script:

    ssh -i "$master_private_key" "$master_username@$master_public_ip" << EOF
        # disable swap
        sudo swapoff -a
        sudo sed -i '/swap/ s/^/#/' /etc/fstab
    
        # setup the bridge for IPV4
        cat <<- MOD | sudo tee /etc/modules-load.d/k8s.conf
            overlay
            br_netfilter
        MOD
        sudo modprobe overlay
        sudo modprobe br_netfilter
    
        # sysctl params required by setup, params persist across reboots
        cat <<- MOD | sudo tee /etc/sysctl.d/k8s.conf
            net.bridge.bridge-nf-call-iptables = 1
            net.bridge.bridge-nf-call-ip6tables = 1
            net.ipv4.ip_forward = 1
        MOD
    
        # Apply sysclt parameters without reboot
        sudo sysctl --system
    
        sudo apt-get update && apt install docker.io -y
        sudo apt-get update 
        sudo apt-get install -y apt-transport-https ca-certificates curl
        sudo mkdir /etc/apt/keyrings
        sudo curl -fsSLo /etc/apt/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg 
        echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/  kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
        sudo apt-get update
        sudo apt-get install -y kubelet kubeadm kubectl
        sudo apt-mark hold kubelet kubeadm kubectl
    
        
        # initialize kubeadm on master
        kubeadm init --pod-network-cidir=192.168.0.0/16 --ignore-preflight-errors=all
    
        mkdir -p $HOME/.kube
        sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
        sudo chown $(id -u):$(id -g) $HOME/.kube/config
    
        # install calico SDN
        kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/tigera-operator.yaml 
        curl https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/custom-resources.yaml  -O
        kubectl create -f custom-resources.yaml
    
        # Get the join command
        $JOIN_COMMAND=$(kubeadm token create --print-join-command)
        export $JOIN_COMMAND
        
    EOF

I am hoping for a pointer to the issue. 
                        
Asked by George Udosen (1917 rep)
Jun 23, 2023, 03:25 PM
Last activity: Jun 23, 2023, 05:47 PM
How to use heredoc inside my ssh command

Related Questions
