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Merge pull request #128 from Thaurin/parallel_check

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Add async checking for updates for improved performance
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mag37 2025-02-24 21:59:30 +01:00 • committed by GitHub
commit 0c6674ac8e
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1 changed files with 51 additions and 11 deletions
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62
dockcheck.sh
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@ -46,6 +46,7 @@ c_blue="\033[0;34m"
c_teal="\033[0;36m"
c_reset="\033[0m"
MaxAsync=32
Timeout=10
Stopped=""
while getopts "aynpfrhlisvmc:e:d:t:" options; do
@ -282,31 +283,70 @@ if [[ $t_out ]]; then
else t_out=""
fi
# Check the image-hash of every running container VS the registry
for i in $(docker ps $Stopped --filter "name=$SearchName" --format '{{.Names}}') ; do
((RegCheckQue+=1))
progress_bar "$RegCheckQue" "$ContCount"
# Looping every item over the list of excluded names and skipping
for e in "${Excludes[@]}" ; do [[ "$i" == "$e" ]] && continue 2 ; done
check_image() {
i="$1"
local Excludes=($Excludes_string)
for e in "${Excludes[@]}" ; do
if [[ "$i" == "$e" ]]; then
echo Skip $i
return
fi
done
local NoUpdates GotUpdates GotErrors
ImageId=$(docker inspect "$i" --format='{{.Image}}')
RepoUrl=$(docker inspect "$i" --format='{{.Config.Image}}')
LocalHash=$(docker image inspect "$ImageId" --format '{{.RepoDigests}}')
# Checking for errors while setting the variable
if RegHash=$(${t_out} $regbin -v error image digest --list "$RepoUrl" 2>&1) ; then
if [[ "$LocalHash" = *"$RegHash"* ]] ; then
NoUpdates+=("$i")
echo NoUpdates "$i"
else
if [[ -n "$DaysOld" ]] && ! datecheck ; then
NoUpdates+=("+$i ${ImageAge}d")
echo NoUpdates "+$i ${ImageAge}d"
else
GotUpdates+=("$i")
echo GotUpdates "$i"
fi
fi
else
# Here the RegHash is the result of an error code
GotErrors+=("$i - ${RegHash}")
echo GotErrors "$i - ${RegHash}"
fi
done
}
# Make required functions and variables available to subprocesses
export -f check_image datecheck
export Excludes_string="${Excludes[@]}" # Can only export scalar variables
export t_out regbin RepoUrl DaysOld
# Check for POSIX xargs with -P option, fallback without async
if (echo "test" | xargs -P 10 >/dev/null 2>&1) ; then
XargsAsync="-P $MaxAsync"
else
XargsAsync=""
printf "%bMissing POSIX xargs, consider installing 'findutils' for asynchronous lookups.%b\n" "$c_red" "$c_reset"
fi
# Asynchronously check the image-hash of every running container VS the registry
while read -r line; do
((RegCheckQue+=1))
progress_bar "$RegCheckQue" "$ContCount"
Got=${line%% *} # Extracts the first word (NoUpdates, GotUpdates, GotErrors)
item=${line#* }
case "$Got" in
NoUpdates) NoUpdates+=("$item") ;;
GotUpdates) GotUpdates+=("$item") ;;
GotErrors) GotErrors+=("$item") ;;
Skip) ;;
*) echo "Error! Unexpected output from subprocess: ${line}" ;;
esac
done < <( \
docker ps $Stopped --filter "name=$SearchName" --format '{{.Names}}' | \
xargs ${XargsAsync} -I {} bash -c 'check_image "{}"' \
)
# Sort arrays alphabetically
IFS=$'\n'