docker-image-refresh.sh

docker-image-refresh.sh

#!/usr/bin/env bash

logExt="$(date +%Y-%m-%d).log"
LOG_FILE="/var/services/homes/james/logs/$(basename "$0").$logExt"

WORK_DIR=$(mktemp -d)

# check if tmp dir was created
if [[ ! "$WORK_DIR" || ! -d "$WORK_DIR" ]]; then
  echo "Could not create temp dir"
  exit 1
fi

# deletes the temp directory
function cleanup {      
  rm -rf "$WORK_DIR"
}

# register the cleanup function to be called on the EXIT signal
trap cleanup EXIT

# get list of all image:rev
# not mariadb|redis as they cause issues
# not |headphones|nzbget as not used
for image in $(docker ps --all | grep -Ev 'mariadb|redis|headphones|nzbget|ID' | awk '{ print $2 }' | grep -v '\d+'); do
    echo "$image"
    docker pull "$image" | tee -a "$LOG_FILE" 
done

# if the docker pull retreived newer images
# get the names, and email me
if [ "$(grep -c newer "$LOG_FILE")" -gt 0 ]; 
then 
    # the awk is to remove leading spaces .. causes issues with mail as does the Status:, hence the cut
    grep newer "$LOG_FILE" | cut -d ":" -f2- | awk '{$1=$1};1' > "$WORK_DIR"/report.txt
    cat > "$WORK_DIR"/mail.txt <<EOF
To: [email protected]
From: [email protected]
Subject: docker image refresh
EOF
    cat "$WORK_DIR"/mail.txt "$WORK_DIR"/report.txt | /usr/bin/ssmtp [email protected]

fi