121 lines
5.1 KiB
Bash
Executable File
121 lines
5.1 KiB
Bash
Executable File
#!/bin/bash
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###############################################################################
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# Load Configuration from json
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###############################################################################
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CONFIG_FILE="folder_mount_config.json"
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# Ensure jq is installed before proceeding.
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if ! command -v jq >/dev/null 2>&1; then
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echo "[ERROR] 'jq' is not installed. Please install jq and try again."
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exit 1
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fi
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# extract the server names at the top level:
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SERVERS=($(jq -r 'keys[]' "$CONFIG_FILE"))
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###############################################################################
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# Function Definitions
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###############################################################################
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# Check if the SSH tunnel on a given local port is active
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is_tunnel_active() {
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local port=$1
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timeout 1 bash -c "</dev/tcp/localhost/${port}" &>/dev/null
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}
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# Check if the given mount point is currently mounted
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is_nfs_mounted() {
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local mount_point=$1
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mount | grep -q "${mount_point}"
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}
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# Check if the mount point directory is accessible (i.e. can be listed)
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is_mount_accessible() {
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local mount_point=$1
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ls -1 "${mount_point}" >/dev/null 2>&1
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}
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###############################################################################
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# Main Loop: Process Each Server and Its Mount Points
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###############################################################################
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for server in "${SERVERS[@]}"; do
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SSH_USER=$(jq -r ".[\"${server}\"].SSH_USER" "$CONFIG_FILE")
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SSH_SERVER=$(jq -r ".[\"${server}\"].SSH_SERVER" "$CONFIG_FILE")
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SSH_SERVER_PORT=$(jq -r ".[\"${server}\"].SSH_SERVER_PORT" "$CONFIG_FILE")
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REMOTE_NFS_PORT=$(jq -r ".[\"${server}\"].REMOTE_NFS_PORT" "$CONFIG_FILE")
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LOCAL_PORT_BASE=$(jq -r ".[\"${server}\"].LOCAL_PORT_BASE" "$CONFIG_FILE")
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readarray -t MOUNT_POINTS < <(jq -r ".[\"${server}\"].MOUNT_POINTS[]" "$CONFIG_FILE")
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readarray -t NFS_SHARES < <(jq -r ".[\"${server}\"].NFS_SHARES[]" "$CONFIG_FILE")
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echo "-------------------------------------------------"
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echo "[INFO] Processing server: ${SSH_SERVER}"
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# Loop over each mount configuration for the current server.
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for i in "${!MOUNT_POINTS[@]}"; do
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MOUNT_POINT="${MOUNT_POINTS[$i]}"
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NFS_SHARE="${NFS_SHARES[$i]}"
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# Calculate a unique local port: base + index offset
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LOCAL_PORT=$(( LOCAL_PORT_BASE + i ))
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echo "-------------------------------------------------"
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echo "[INFO] Setting up mount for ${MOUNT_POINT}"
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echo "[INFO] NFS Share: ${NFS_SHARE}"
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echo "[INFO] Using local port: ${LOCAL_PORT}"
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# Check and (re)establish the SSH tunnel if needed.
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if ! is_tunnel_active "${LOCAL_PORT}"; then
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echo "[INFO] SSH Tunnel on port ${LOCAL_PORT} is down. Attempting to reconnect..."
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ssh -f -N -L "${LOCAL_PORT}:localhost:${REMOTE_NFS_PORT}" \
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-o ExitOnForwardFailure=yes \
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-p "${SSH_SERVER_PORT}" \
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"${SSH_USER}@${SSH_SERVER}"
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if is_tunnel_active "${LOCAL_PORT}"; then
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echo "[SUCCESS] SSH Tunnel established on local port ${LOCAL_PORT}."
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else
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echo "[ERROR] Failed to establish SSH tunnel for mount ${MOUNT_POINT}!"
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continue # Skip mounting for this configuration if tunnel fails
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fi
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else
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echo "[INFO] SSH Tunnel already active on port ${LOCAL_PORT}."
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fi
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# Ensure the mount point directory exists
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if [ ! -d "${MOUNT_POINT}" ]; then
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echo "[INFO] Creating mount point directory: ${MOUNT_POINT}"
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sudo mkdir -p "${MOUNT_POINT}"
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fi
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# Check if the NFS share is mounted and accessible.
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if is_nfs_mounted "${MOUNT_POINT}"; then
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if ! is_mount_accessible "${MOUNT_POINT}"; then
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echo "[WARNING] Mount point ${MOUNT_POINT} is not accessible. Attempting to remount..."
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sudo umount "${MOUNT_POINT}"
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sleep 2
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sudo mount -t nfs -o ro,port="${LOCAL_PORT}",nolock,soft,timeo=5,retrans=3 127.0.0.1:"${NFS_SHARE}" "${MOUNT_POINT}"
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if is_mount_accessible "${MOUNT_POINT}"; then
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echo "[SUCCESS] Remounted successfully and folder is now accessible."
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else
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echo "[ERROR] Remount failed, folder still not accessible."
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fi
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else
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echo "[INFO] NFS share is mounted and accessible at ${MOUNT_POINT}."
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fi
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else
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echo "[INFO] NFS share is not mounted at ${MOUNT_POINT}. Attempting to mount..."
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sudo mount -t nfs -o ro,port="${LOCAL_PORT}",nolock,soft,timeo=5,retrans=3 127.0.0.1:"${NFS_SHARE}" "${MOUNT_POINT}"
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if is_mount_accessible "${MOUNT_POINT}"; then
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echo "[SUCCESS] NFS share mounted successfully at ${MOUNT_POINT}."
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else
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echo "[ERROR] Failed to mount NFS share ${NFS_SHARE} at ${MOUNT_POINT} or folder not accessible!"
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fi
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fi
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done
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done
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echo "-------------------------------------------------"
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echo "[INFO] All server mount configurations processed."
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