Could someone help me with my bash script that copies contents of a directory and pastes it to multiple servers?

Question

I have a script that copies the contents of a directory. This directory contains drivers organized by computer model name. I would like to be able to update my main node (drop edited cab files) and have its entire content sent to multiple servers on the network. I have this working now, however its copying over everything in the main directory. I only want updated directories. Is there a way I can do this?

#!/bin/bash
#source directory
source_directory="/images/drivers"

#remote username
remote_user="username"

#array of remote server IPs
remote_servers=("10.xx.xx.xxx" "10.xx.xx.xxx")

#Destination directory on remote servers
destination_directory="/images/drivers"

#specify the user and group ownership for the copied directories
ownership="name:name"

#Loop through each remote server and copy the contents
for server in "${remote_servers[@]}"; do
        rsync -avs --ignore-existing --chown="$ownership" "$source_directory/" "$remote_user@$server:$destination_directory/"
done

Answer 1

You're missing " for ownership variable. And the --ignore-existing flag is currently set, which means files that already exist on the receiver side will not be overwritten.

Use --checksum or -c flag with rsync. Use --delete flag to delete extraneous files from destination directories. Use this if you want to keep the destination strictly in sync with the source directory, meaning if you delete a file in the source, it will also be deleted in the destination.

#!/bin/bash
# Source directory
source_directory="/images/drivers"

# Remote username
remote_user="username"

# Array of remote server IPs
remote_servers=("10.xx.xx.xxx" "10.xx.xx.xxx")

# Destination directory on remote servers
destination_directory="/images/drivers"

# Specify the user and group ownership for the copied directories
ownership="name:name"

# Loop through each remote server and copy the updated contents
for server in "${remote_servers[@]}"; do
    rsync -avs --checksum --chown="$ownership" "$source_directory/" "$remote_user@$server:$destination_directory/"
done

Keep in mind that using the --checksum flag can be CPU intensive, especially for large directories. So, test thoroughly before deploying.