Create dockcheck.sh

first commit

dockcheck.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+
+### Check arch:
+case "`uname --machine`" in
+  x86_64|amd64)
+    architecture="amd64";;
+  arm64|aarch64)
+    architecture="arm64";;
+  *) echo "Architecture not supported, exiting." ; exit ;;
+esac
+
+### Check if required application exists in PATH or directory:
+if [[ $(builtin type -P "regctl") ]]; then 
+  regbin="regctl"
+elif [[ -f "./regctl" ]]; then
+  regbin="./regctl"
+else
+  printf "Required dependency 'regctl' missing, do you want it downloaded? y/[n]\n"
+  read GetDep
+  if [ "$GetDep" != "${GetDep#[Yy]}" ]; then
+    curl -L https://github.com/regclient/regclient/releases/latest/download/regctl-linux-$architecture >./regctl
+    chmod 755 ./regctl
+    regbin="./regctl"
+  else
+    printf "Dependency missing, quitting.\n"
+    exit
+  fi
+fi
+
+### Check the image-hash of every running container VS the registry
+for i in $(docker ps --format '{{.Image}},{{.Names}}') 
+do
+  RepoUrl=$( echo "$i" | cut -d, -f1)
+  ContName=$( echo "$i" | cut -d, -f2)
+  LocalHash=$(docker image inspect $RepoUrl --format '{{.RepoDigests}}' | sed -e 's/.*sha256/sha256/' -e 's/\]$//')
+  RegHash=$(./regctl image digest --list $RepoUrl)
+  if [[ "$LocalHash" != "$RegHash" ]] ; then
+    GotUpdates+=("$ContName")
+  else
+    NoUpdates+=("$ContName")
+  fi
+done
+
+### List what containers got updates or not
+if [ ! -z $GotUpdates ] ; then
+  printf "\n\033[31;1mContainers with updates available:\033[0m\n"
+  printf "%s\n" "${GotUpdates[@]}"
+fi
+if [ ! -z $NoUpdates ] ; then
+  printf "\n\033[32;1mContainers on latest version:\033[0m\n"
+  printf "%s\n" "${NoUpdates[@]}"
+fi
+
+### Optionally get updates 
+printf "\n\033[36;1mDo you want to update? y/[n]\033[0m\n"
+read UpdYes
+if [ "$UpdYes" != "${UpdYes#[Yy]}" ] ; then
+  for i in "${GotUpdates[@]}"
+  do 
+    # Check what compose-type is installed:
+    if docker compose &> /dev/null ; then DockerBin="docker compose" ; else DockerBin="docker-compose" ; fi
+    ContPath=$(docker inspect $i --format '{{ index .Config.Labels "com.docker.compose.project.working_dir"}}')
+    $DockerBin -f "$ContPath/docker-compose.yml" pull 
+    $DockerBin -f "$ContPath/docker-compose.yml" up -d
+  done
+else
+  printf "\nNo updates installed, exiting.\n"
+fi