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data/Dockerfiles/clamd/Dockerfile

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+FROM alpine:3.20
+
+LABEL maintainer = "The Infrastructure Company GmbH <info@servercow.de>"
+
+RUN apk upgrade --no-cache \
+  && apk add --update --no-cache \
+  rsync \
+  clamav \
+  bind-tools \
+  bash \
+  tini
+
+# init
+COPY clamd.sh /clamd.sh
+RUN chmod +x /sbin/tini
+
+# healthcheck
+COPY healthcheck.sh /healthcheck.sh
+COPY clamdcheck.sh /usr/local/bin
+RUN chmod +x /healthcheck.sh
+RUN chmod +x /usr/local/bin/clamdcheck.sh
+HEALTHCHECK --start-period=6m CMD "/healthcheck.sh"
+
+ENTRYPOINT []
+CMD ["/sbin/tini", "-g", "--", "/clamd.sh"]

data/Dockerfiles/clamd/clamd.sh

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+#!/bin/bash
+
+if [[ "${SKIP_CLAMD}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
+  echo "SKIP_CLAMD=y, skipping ClamAV..."
+  sleep 365d
+  exit 0
+fi
+
+# Cleaning up garbage
+echo "Cleaning up tmp files..."
+rm -rf /var/lib/clamav/clamav-*.tmp
+
+# Prepare whitelist
+
+mkdir -p /run/clamav /var/lib/clamav
+
+if [[ -s /etc/clamav/whitelist.ign2 ]]; then
+  echo "Copying non-empty whitelist.ign2 to /var/lib/clamav/whitelist.ign2"
+  cp /etc/clamav/whitelist.ign2 /var/lib/clamav/whitelist.ign2
+fi
+
+if [[ ! -f /var/lib/clamav/whitelist.ign2 ]]; then
+  echo "Creating /var/lib/clamav/whitelist.ign2"
+  cat <<EOF > /var/lib/clamav/whitelist.ign2
+# Please restart ClamAV after changing signatures
+Example-Signature.Ignore-1
+PUA.Win.Trojan.EmbeddedPDF-1
+PUA.Pdf.Trojan.EmbeddedJavaScript-1
+PUA.Pdf.Trojan.OpenActionObjectwithJavascript-1
+EOF
+fi
+
+chown clamav:clamav -R /var/lib/clamav /run/clamav
+
+chmod 755 /var/lib/clamav
+chmod 644 -R /var/lib/clamav/*
+chmod 750 /run/clamav
+
+stat /var/lib/clamav/whitelist.ign2
+dos2unix /var/lib/clamav/whitelist.ign2
+sed -i '/^\s*$/d' /var/lib/clamav/whitelist.ign2
+# Copying to /etc/clamav to expose file as-is to administrator
+cp -p /var/lib/clamav/whitelist.ign2 /etc/clamav/whitelist.ign2
+
+
+BACKGROUND_TASKS=()
+
+echo "Running freshclam..."
+freshclam
+
+(
+while true; do
+  sleep 12600
+  freshclam
+done
+) &
+BACKGROUND_TASKS+=($!)
+
+(
+while true; do
+  sleep 10m
+  SANE_MIRRORS="$(dig +ignore +short rsync.sanesecurity.net)"
+  for sane_mirror in ${SANE_MIRRORS}; do
+    CE=
+    rsync -avp --chown=clamav:clamav --chmod=Du=rwx,Dgo=rx,Fu=rw,Fog=r --timeout=5 rsync://${sane_mirror}/sanesecurity/ \
+      --include 'blurl.ndb' \
+      --include 'junk.ndb' \
+      --include 'jurlbl.ndb' \
+      --include 'jurbla.ndb' \
+      --include 'phishtank.ndb' \
+      --include 'phish.ndb' \
+      --include 'spamimg.hdb' \
+      --include 'scam.ndb' \
+      --include 'rogue.hdb' \
+      --include 'sanesecurity.ftm' \
+      --include 'sigwhitelist.ign2' \
+      --exclude='*' /var/lib/clamav/
+    CE=$?
+    chmod 755 /var/lib/clamav/
+    if [ ${CE} -eq 0 ]; then
+      while [ ! -z "$(pidof freshclam)" ]; do
+        echo "Freshclam is active, waiting..."
+        sleep 5
+      done
+      echo RELOAD | nc clamd-mailcow 3310
+      break
+    fi
+  done
+  sleep 12h
+done
+) &
+BACKGROUND_TASKS+=($!)
+
+nice -n10 clamd &
+BACKGROUND_TASKS+=($!)
+
+while true; do
+  for bg_task in ${BACKGROUND_TASKS[*]}; do
+    if ! kill -0 ${bg_task} 1>&2; then
+      echo "Worker ${bg_task} died, stopping container waiting for respawn..."
+      kill -TERM 1
+    fi
+    sleep 10
+  done
+done

data/Dockerfiles/clamd/clamdcheck.sh

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+#!/bin/sh
+
+set -eu
+
+if [ "${CLAMAV_NO_CLAMD:-}" != "false" ]; then
+	if [ "$(echo "PING" | nc localhost 3310)" != "PONG" ]; then
+		echo "ERROR: Unable to contact server"
+		exit 1
+	fi
+
+	echo "Clamd is up"
+fi
+
+exit 0

data/Dockerfiles/clamd/healthcheck.sh

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+#!/bin/bash
+
+if [[ "${SKIP_CLAMD}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
+  echo "SKIP_CLAMD=y, skipping ClamAV..."
+  exit 0
+fi
+
+# run clamd healthcheck
+/usr/local/bin/clamdcheck.sh