Added hook for cron script on nfs or gluster for configuration of vss nodes

[Edunao]

Added hook for cron script on nfs or gluster for configuration of vss nodes

[hosungsmsft]

Thanks much for your contribution @Edunao . Looks good to me and this will be merged right after for your current urgent needs, but later we'll be integrating this hook with the sync script above.

[Edunao]

Many thanks for the merge.
It might actually be good to keep 2 separate sync scripts here - the first one copies the latest code snapshot, whatever it contains. The second executes any processes that haven't yet been run on the system. The two concepts are not quite the same and so may merit independent treatment.

[hosungsmsft]

Interesting. I look forward to seeing your /moodle/bin/update-vmss-config later. Hopefully you'll share that with us after all these are done. Thanks much again for your contribution!

[Edunao]

The general form of the bin file is this:

#!/bin/bash

# Lookup the version number corresponding to the next process to be run on the machine
VERSION=1
VERSION_FILE=/root/vmss_config_version
[ -f ${VERSION_FILE} ] && VERSION=$(<${VERSION_FILE})

# iterate over processes that haven't yet been run on this machine, executing them one by one
while true
do
    case $VERSION in
        1)
            # create local directories on fast storage for moodle to work with
            # ...
        ;;
        2)
            # update php configuration
            # ...
        ;;
        3)
            # installer mailer packages and configure them
            # ...
        ;;
        *)
            # nothing more to do so exit
            exit 0
        ;;
    esac

    # increment the version number and store it away to mark the successful end of the process
    VERSION=$(( $VERSION + 1 ))
    echo $VERSION > ${VERSION_FILE}

done

[nelsontalag]

Thanks This was very useful

was able to update /etc configurations with this hook