Publish CVMFS named snapshots

scripts/automatic-cvmfs-named-snapshot/automatic-cvmfs-named-snapshot.sh

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+#!/bin/bash
+
+# Automatically create a named snapshot for a given CVMFS repository.
+# This script has to be run on a CVMFS publisher node.
+
+# This script assumes that the given repository name is valid and exists in the CVMFS repositories.
+# It also assumes that the repository is not currently in a transaction and that it has not had a transaction in the past 30 minutes.
+
+# Only if it passes these checks, the script will open a transaction to the given repository and run the cvmfs_server publish command.
+# The script will increment the snapshot number by 1 for each new named snapshot.
+
+# Usage: ./automatic-cvmfs-named-snapshot.sh <cvmfs_repo>
+
+# Function to check if the repository is currently in a transaction
+function check_transaction() {
+    if cvmfs_server transaction | grep -q "${cvmfs_repo}"; then
+        echo "Repository ${cvmfs_repo} is currently in a transaction."
+        exit 1
+    fi
+}
+
+# Function to check if the repository has not had a transaction in the past 30 minutes
+function check_last_transaction() {
+    last_transaction_timestamp=$(cvmfs_server tag -lx ${cvmfs_repo} | awk '{print $5}' | head -n 1)
+    current_timestamp=$(date +%s)
+    time_diff=$((current_timestamp - last_transaction_timestamp))
+    if [ $time_diff -lt 1800 ]; then
+        echo "Repository ${cvmfs_repo} has had a transaction in the past 30 minutes."
+        exit 1
+    fi
+}
+
+# Function to open a transaction to the given repository
+function open_transaction() {
+    cvmfs_server transaction ${cvmfs_repo}
+}
+
+# Function to run the cvmfs_server publish command
+function run_publish_command() {
+    # Get the last snapshot number
+    last_snapshot=$(cvmfs_server tag -lx ${cvmfs_repo} | grep "${cvmfs_repo}-rev" | head -n 1 | awk '{print $1}' | sed 's/.*rev//')
+
+    # Increment the snapshot number and keep same number of digits
+    new_snapshot=$((10#$last_snapshot + 1))
+    new_snapshot=$(printf "%04d" "$new_snapshot")
+
+    # Run the cvmfs_server publish command
+    cvmfs_server publish -a "${cvmfs_repo}-rev${new_snapshot}" "${cvmfs_repo}"
+}
+
+# Main script
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 <cvmfs_repo>"
+    exit 1
+fi
+
+cvmfs_repo="$1"
+
+# Check if the repository is part of the CVMFS repositories
+if ! cvmfs_server list | awk '{print $1}' | grep -qxF "${cvmfs_repo}" ; then
+    echo "Repository ${cvmfs_repo} is not a valid CVMFS repository."
+    exit 1
+fi
+
+# Check if the repository is currently in a transaction
+check_transaction
+
+# Check if the repository has not had a transaction in the past 30 minutes
+check_last_transaction
+
+# Open a transaction to the given repository
+open_transaction
+
+# Run the cvmfs_server publish command
+run_publish_command