mirror of
https://github.com/RipleyBooya/ssh-tunnel.git
synced 2025-12-11 07:28:39 +01:00
49 lines
1.6 KiB
Bash
49 lines
1.6 KiB
Bash
#!/bin/bash
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set -e
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# Check if required environment variables are set
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if [ -z "$SSH_HOST" ] || [ -z "$SSH_USER" ] || [ -z "$REMOTE_PORTS" ] || [ -z "$LOCAL_PORTS" ]; then
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echo "ERROR: Required variables (SSH_HOST, SSH_USER, REMOTE_PORTS, LOCAL_PORTS) are missing."
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exit 1
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fi
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# Check if the SSH key exists in /tmp/ and copy it to /root/.ssh/
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if [ -f "/tmp/id_rsa" ]; then
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echo "Copying SSH key to /root/.ssh/id_rsa..."
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cp /tmp/id_rsa /root/.ssh/id_rsa
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chmod 600 /root/.ssh/id_rsa
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else
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echo "ERROR: SSH key is missing. Please mount your private key to /tmp/id_rsa."
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exit 1
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fi
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# Clear logs on container startup
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echo "" > /var/log/ssh-tunnel/tunnel.log
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# Generate logrotate config using environment variables
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envsubst < /logrotate.template > /etc/logrotate.d/ssh-tunnel
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# Build the SSH tunnel command
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TUNNEL_CMD=""
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LOCAL_PORT_ARRAY=($LOCAL_PORTS)
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REMOTE_PORT_ARRAY=($REMOTE_PORTS)
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for i in "${!LOCAL_PORT_ARRAY[@]}"; do
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TUNNEL_CMD="$TUNNEL_CMD -L ${LOCAL_PORT_ARRAY[$i]}:${REMOTE_PORT_ARRAY[$i]}"
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done
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echo "Starting SSH tunnel to $SSH_USER@$SSH_HOST" | tee -a /var/log/ssh-tunnel/tunnel.log
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echo "Configured tunnels:" | tee -a /var/log/ssh-tunnel/tunnel.log
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for i in "${!LOCAL_PORT_ARRAY[@]}"; do
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echo "- ${LOCAL_PORT_ARRAY[$i]} -> ${REMOTE_PORT_ARRAY[$i]}" | tee -a /var/log/ssh-tunnel/tunnel.log
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done
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# Start autossh to maintain the tunnel (disables host key checking)
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exec autossh -M 0 \
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-o "StrictHostKeyChecking=no" \
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-o "UserKnownHostsFile=/dev/null" \
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-o "ServerAliveInterval=60" \
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-o "ServerAliveCountMax=3" \
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-o "Compression=yes" \
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-N $TUNNEL_CMD $SSH_USER@$SSH_HOST 2>&1 | tee -a /var/log/ssh-tunnel/tunnel.log
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