Script to check if containers are up to date, update if necessary and yell
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119
HatarashiHako
Executable file
119
HatarashiHako
Executable file
@@ -0,0 +1,119 @@
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#!/bin/bash
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##Script to update Docker container images occasionally and alert when update is done.
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source /root/.bash_profile
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if [[ $1 =~ "-v|--verbose|verbose" ]]; then
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source /home/shmick/Scripts/Okiru "$1"
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else
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source /home/shmick/Scripts/Okiru
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fi
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source /etc/environment
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#Remember where you are to change back to later
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LOCAL_DIR=`pwd`
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#This is where containers live
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CONTAINER_DIR="/var/Red-Vol/Media/Containers/"
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declare -a CONTAINER_PATHS
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declare -a OUTDATED_CONTAINERS
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declare -a FAILED_CONTAINERS
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declare -a UPDATED_CONTAINERS
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#Remove log from last runs, if present
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if [[ -f /tmp/docker-updated ]]; then
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rm /tmp/docker-updated
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fi
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#Start counting how many containers fail; appears in final mail subject.
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OUTDATED_COUNT="0"
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CONTAINER_PATHS=$(find $CONTAINER_DIR -maxdepth 2 -type f -name docker-compose.yml ! -path '*Archive*' | xargs dirname )
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#Find containers in ^ base dir ^ in base container path ^ by finding compose files ^ (not here) ^ and getting their directory name.
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for container_path in ${CONTAINER_PATHS[@]}; do
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cd $container_path
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debug "Working on container directory $container_path"
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container_stack=$(basename $container_path)
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info "Working on stack" "$container_stack"
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container_images="$(cat $container_path/docker-compose.yml | grep -E "image: ([a-z]+)/([a-z]+)(:[a-z0-9].*$)?" | grep -Ev 'postgresql|mariadb' | awk '{print $2}')"
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# search for a pattern of something:something with optional :tag ^ avoid database containers print ^ image name
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for container_image in $container_images; do
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container_name="$(echo $container_image | awk -F/ '{print $2}' | sed "s/\:.*//")"
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# remove everything after the : ^
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debug "$container_stack has image $container_image"
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if [[ -n $(echo $container_image | grep -E "(.*:[a-z0-9].*$)") ]]; then
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# check if there is a :tag present ^
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image_tag=":$(echo $container_image | awk -F: '{print $NF}')"
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# !! Add : ^ before image !! so it is only added to later commands if there is an image at all
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debug "$container_image has tag $image_tag"
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export container_image=$(echo $container_image | awk -F: '{print $1}')
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# If the container does have a tag, keep the base name ^ without it (before the :)
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fi
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debug "Fetching local image checksum with: docker inspect \"$container_image$image_tag\" | grep -Eo \"$container_image@sha256:([0-9a-zA-Z].*)(\")\" | sed -e 's/\"//g' | awk -F@ '{print \$2}"
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local_image=$(docker inspect "$container_image$image_tag" | grep -Eo "$container_image@sha256:([0-9a-zA-Z].*)(\")" | sed -e 's/"//g' -e 's/\s+//g' | awk -F@ '{print $2}')
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# remember, this bit ^ is empty without an image ^ this is the main image checksum remove ^ " and whitespace and^ get the checksum after the @
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if [[ -z $local_image ]]; then
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error "Error fetching local image checksum for container $container_name!"
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#The script will complain about failed containers later on
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FAILED_CONTAINERS+=("(local) $container_name")
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continue 2
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else
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debug "Local SHA256 for $container_image is $local_image"
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fi
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debug "Fetching remote image with: skopeo inspect --creds \"dkd6:Vulthuryol569\" docker://docker.io/$container_image$image_tag | grep Digest | head -1 | grep -Eo 'sha256:([0-9a-zA-Z].*)(\")' | sed -e 's/\"//g'"
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#Use Skopeo, a Red Hat tool, with my Docker Hub account to register the remote image checksum
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remote_image=$(skopeo inspect --creds "dkd6:Vulthuryol569" docker://docker.io/$container_image$image_tag | grep Digest | head -1 | grep -Eo 'sha256:([0-9a-zA-Z].*)(")' | sed -e 's/"//g' -e 's/\s+//g' )
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#Sometimes; Docker hub hangs up; try again if you failed
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if [[ -z $remote_image ]]; then
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remote_image=$(skopeo inspect --creds "dkd6:Vulthuryol569" docker://docker.io/$container_image$image_tag | grep Digest | head -1 | grep -Eo 'sha256:([0-9a-zA-Z].*)(")' | sed -e 's/"//g')
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fi
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#Now, if you still don't have an image after the second try, something's fuckey.
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if [[ -z $remote_image ]]; then
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error "Error fetching remote image checksum for container $container_name!"
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FAILED_CONTAINERS+=("(remote) $container_name")
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continue 2
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else
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debug "Remote SHA256 for $container_image is $remote_image"
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fi
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#If we have both checksums, compare them; they should be identical, or the container is outdated.
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if [[ -n $local_image ]] && [[ -n $remote_image ]] && [[ "$local_image" =~ "$remote_image" ]]; then
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ok "$container_name is up to date!"
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else
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warn "$container_name is out of date!"
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info "Attempting to update $container_name"
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if docker-compose pull $container_name; then
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info "Pulled latest image for $container_name succesfully. Restarting..."
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if docker-compose up -d --remove-orphans; then
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ok "$container_stack has been updated sucessfully!"
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UPDATED_CONTAINERS+=("($container_stack) $container_name")
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else
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error "Failed to update $container_name!"
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FAILED_CONTAINERS+=("($container_stack|update) $container_name")
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#Add to array for mail report
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OUTDATED_CONTAINERS+=("($container_stack) $container_name")
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export OUTDATED_COUNT=$(($OUTDATED_COUNT+1))
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fi
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else
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error "Failed to pull image for $container_name!"
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FAILED_CONTAINERS+=("($container_stack|pull) $container_name")
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#Add to array for mail report
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OUTDATED_CONTAINERS+=("($container_stack) $container_name")
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export OUTDATED_COUNT=$(($OUTDATED_COUNT+1))
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fi
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fi
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#If you found an image tag, reset it before moving on to another container
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image_tag=""
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done
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cd $LOCAL_DIR
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done
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echo "All done!"
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#Iterate over the arrays and output results to a file; if needed, it will be neatly mailed.
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if [[ ${#OUTDATED_CONTAINERS[@]} != 0 ]] || [[ ${#FAILED_CONTAINERS[@]} != 0 ]] || [[ ${#UPDATED_CONTAINERS[@]} != 0 ]]; then
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if [[ ${#UPDATED_CONTAINERS[@]} != 0 ]]; then
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printf "The following containers have updated succefully:\n" > /tmp/docker-updated
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printf "%s\n" "${UPDATED_CONTAINERS[@]}" >> /tmp/docker-updated
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fi
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if [[ ${#OUTDATED_CONTAINERS[@]} != 0 ]]; then
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printf "The following containers are out of date:\n" >> /tmp/docker-updated
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printf "%s\n" "${OUTDATED_CONTAINERS[@]}" >> /tmp/docker-updated
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fi
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if [[ ${#FAILED_CONTAINERS[@]} != 0 ]]; then
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printf "The following containers failed the update process:\n" >> /tmp/docker-updated
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printf "%s\n" "${FAILED_CONTAINERS[@]}" >> /tmp/docker-updated
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fi
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cat /tmp/docker-updated | mail -s "Docker containers update report - `date +"%B %d %Y"`" -r "Takahe@pukeko.xyz" matanhorovitz@protonmail.com
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rm /tmp/docker-updated
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fi
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