From 2e618492a2f5fff0567f9c1a1182d315db90a605 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Mon, 1 Dec 2025 12:50:39 +0200
Subject: [PATCH 01/11] Try again to build with Alpine 3.23 for all
 architectures. (#92)

---
 .github/workflows/github-build.yml | 134 ++--------------
 Dockerfile                         |   6 +-
 alpine3-12.dockerfile              | 245 -----------------------------
 3 files changed, 17 insertions(+), 368 deletions(-)
 delete mode 100644 alpine3-12.dockerfile

diff --git a/.github/workflows/github-build.yml b/.github/workflows/github-build.yml
index a57007c..5d5e7c4 100644
--- a/.github/workflows/github-build.yml
+++ b/.github/workflows/github-build.yml
@@ -92,22 +92,11 @@ jobs:
             --progress plain \
             --cache-from "type=local,src=/tmp/.buildx-cache" \
             --cache-to "type=local,dest=/tmp/.buildx-cache" \
-            --platform linux/386,linux/amd64,linux/arm64 \
+            --platform linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64 \
             --label "gitCommit=${{ github.sha }}" \
             --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }} \
-            --output "type=image,push=false" -f Dockerfile .
-      - name: Docker Buildx (build and cache) for linux/arm/v6,linux/arm/v7 (Alpine 3.12)
-        run: |
-          docker buildx build \
-            --progress plain \
-            --cache-from "type=local,src=/tmp/.buildx-cache" \
-            --cache-to "type=local,dest=/tmp/.buildx-cache" \
-            --platform linux/arm/v6,linux/arm/v7 \
-            --label "gitCommit=${{ github.sha }}" \
-            --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }} \
-            --output "type=image,push=false" -f alpine3-12.dockerfile .
+            --tag ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} \
+            --output "type=image,push=false" .
       - name: 'Docker Buildx: Push to Dockerhub'
         run: |
           echo "== This branch is : ${GITHUB_REF}"
@@ -115,118 +104,23 @@ jobs:
           docker buildx build \
             --progress plain \
             --cache-from "type=local,src=/tmp/.buildx-cache" \
-            --platform linux/386,linux/amd64,linux/arm64 \
+            --platform linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64 \
             --label "gitCommit=${{ github.sha }}" \
             --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }} \
-            --output "type=image,push=true" -f Dockerfile .
-      - name: 'Docker Buildx: Push to Dockerhub for linux/arm/v6,linux/arm/v7 (Alpine 3.12)'
-        run: |
-          echo "== This branch is : ${GITHUB_REF}"
-          echo "Will push image ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} to DockerHub"
-          docker buildx build \
-            --progress plain \
-            --cache-from "type=local,src=/tmp/.buildx-cache" \
-            --platform linux/arm/v6,linux/arm/v7 \
-            --label "gitCommit=${{ github.sha }}" \
-            --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }} \
-            --output "type=image,push=true" -f alpine3-12.dockerfile .
+            --tag ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} \
+            --output "type=image,push=true" .
       - name: 'Docker Buildx: Push to GitHub Container Registry'
-        run: |
-          echo "== This branch is : ${GITHUB_REF}"
-          echo "Will push image ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} to DockerHub"
-          docker buildx build \
-            --progress plain \
-            --cache-from "type=local,src=/tmp/.buildx-cache" \
-            --platform linux/386,linux/amd64,linux/arm64 \
-            --label "gitCommit=${{ github.sha }}" \
-            --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }} \
-            --output "type=image,push=true" -f Dockerfile .
-      - name: 'Docker Buildx: Push to GitHub Container Registry for linux/arm/v6,linux/arm/v7 (Alpine 3.12)'
-        run: |
-          echo "== This branch is : ${GITHUB_REF}"
-          echo "Will push image ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} to DockerHub"
-          docker buildx build \
-            --progress plain \
-            --cache-from "type=local,src=/tmp/.buildx-cache" \
-            --platform linux/arm/v6,linux/arm/v7 \
-            --label "gitCommit=${{ github.sha }}" \
-            --label "org.opencontainers.image.revision=${{ github.sha }}" \
-            --tag ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }} \
-            --output "type=image,push=true" -f alpine3-12.dockerfile .
-      - name: Download and configure jq
-        run: |
-          echo "Download jq"
-          wget https://github.com/jqlang/jq/releases/download/jq-1.7.1/jq-linux-amd64
-          echo "Configure jq"
-          mv jq-linux-amd64 jq
-          chmod 744 jq
-      - name: Create a new unified manifest for Dockerhub
-        run: |
-          echo "Download manifest of ${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }}"
-          docker buildx imagetools inspect ${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }} --raw > manifest1.json
-          echo "Download manifest of ${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }}"
-          docker buildx imagetools inspect ${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }} --raw > manifest2.json
-          ls -l manifest*json
-          SHA256_AMD64=$(cat manifest1.json | ./jq -r '.manifests[]| select(.platform.architecture == "amd64") | .digest')
-          SHA256_ARM64=$(cat manifest1.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm64") | .digest')
-          SHA256_I386=$(cat manifest1.json  | ./jq -r '.manifests[]| select(.platform.architecture == "386")   | .digest')
-          SHA256_ARMV6=$(cat manifest2.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm")   | select(.platform.variant == "v6") | .digest')
-          SHA256_ARMV7=$(cat manifest2.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm")   | select(.platform.variant == "v7") | .digest')
-          echo "Creating new manifest: ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}"
-          set -eux
-          docker manifest create --amend ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} \
-             "${GITHUB_ACTOR}/nagios@${SHA256_AMD64}" \
-             "${GITHUB_ACTOR}/nagios@${SHA256_ARM64}" \
-             "${GITHUB_ACTOR}/nagios@${SHA256_I386}"  \
-             "${GITHUB_ACTOR}/nagios@${SHA256_ARMV6}" \
-             "${GITHUB_ACTOR}/nagios@${SHA256_ARMV7}"
-          echo "Annotating new manifest: ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} with platforms and architectures"
-          docker manifest annotate ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} "${GITHUB_ACTOR}/nagios@${SHA256_AMD64}" --arch amd64 --os linux
-          docker manifest annotate ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} "${GITHUB_ACTOR}/nagios@${SHA256_ARM64}" --arch arm64 --os linux
-          docker manifest annotate ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} "${GITHUB_ACTOR}/nagios@${SHA256_I386}"  --arch 386   --os linux
-          docker manifest annotate ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} "${GITHUB_ACTOR}/nagios@${SHA256_ARMV6}" --arch arm   --os linux --variant v6
-          docker manifest annotate ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} "${GITHUB_ACTOR}/nagios@${SHA256_ARMV7}" --arch arm   --os linux --variant v7
-      - name: Create a new unified manifest for GitHub Container Registry
-        run: |
-          echo "Download manifest of ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }}"
-          docker buildx imagetools inspect ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-21-${{ env.action_mytag }} --raw > manifest1.json
-          echo "Download manifest of ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }}"
-          docker buildx imagetools inspect ghcr.io/${GITHUB_ACTOR}/nagios:alpine-3-12-${{ env.action_mytag }} --raw > manifest2.json
-          ls -l manifest*json
-          SHA256_AMD64=$(cat manifest1.json | ./jq -r '.manifests[]| select(.platform.architecture == "amd64") | .digest')
-          SHA256_ARM64=$(cat manifest1.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm64") | .digest')
-          SHA256_I386=$(cat manifest1.json  | ./jq -r '.manifests[]| select(.platform.architecture == "386")   | .digest')
-          SHA256_ARMV6=$(cat manifest2.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm")   | select(.platform.variant == "v6") | .digest')
-          SHA256_ARMV7=$(cat manifest2.json | ./jq -r '.manifests[]| select(.platform.architecture == "arm")   | select(.platform.variant == "v7") | .digest')
-          echo "Creating new manifest: ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}"
-          set -eux
-          docker manifest create --amend ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} \
-             ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_AMD64}" \
-             ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARM64}" \
-             ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_I386}"  \
-             ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARMV6}" \
-             ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARMV7}"
-          echo "Annotating new manifest: ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} with platforms and architectures"
-          docker manifest annotate ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_AMD64}" --arch amd64 --os linux
-          docker manifest annotate ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARM64}" --arch arm64 --os linux
-          docker manifest annotate ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_I386}"  --arch 386   --os linux
-          docker manifest annotate ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARMV6}" --arch arm   --os linux --variant v6
-          docker manifest annotate ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} ghcr.io/"${GITHUB_ACTOR}/nagios@${SHA256_ARMV7}" --arch arm   --os linux --variant v7
-      - name: 'Push manifest to DockerHub'
-        run: |
-          echo "== This branch is : ${GITHUB_REF}"
-          echo "Will push image manifest ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} to DockerHub Registry"
-          docker manifest push ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}
-      - name: 'Push manifest to GitHub Container Registry'
         run: |
           echo "== This branch is : ${GITHUB_REF}"
           echo "Will push image ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} to GitHub Container Registry"
-          docker manifest push ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}
+          docker buildx build \
+            --progress plain \
+            --cache-from "type=local,src=/tmp/.buildx-cache" \
+            --platform linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64 \
+            --label "gitCommit=${{ github.sha }}" \
+            --label "org.opencontainers.image.revision=${{ github.sha }}" \
+            --tag ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }} \
+            --output "type=image,push=true" .
       - name: Inspect image
         run: |
           docker buildx imagetools inspect ${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}
-          docker buildx imagetools inspect ghcr.io/${GITHUB_ACTOR}/nagios:${{ env.action_mytag }}
-
diff --git a/Dockerfile b/Dockerfile
index 9036350..7a212e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 
 # https://www.docker.com/blog/docker-arm-virtual-meetup-multi-arch-with-buildx/
 
-FROM alpine:3.22 AS builder-base
+FROM alpine:3.23 AS builder-base
 
 ARG TARGETPLATFORM
 ARG BUILDPLATFORM
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="31" \
+      build="32-snapshot" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="31"
+      org.opencontainers.image.version="32-snapshot"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2
diff --git a/alpine3-12.dockerfile b/alpine3-12.dockerfile
deleted file mode 100644
index 9684a64..0000000
--- a/alpine3-12.dockerfile
+++ /dev/null
@@ -1,245 +0,0 @@
-### ================================== ###
-###   STAGE 1 CREATE PARENT IMAGE      ###
-### ================================== ###
-
-# https://www.docker.com/blog/docker-arm-virtual-meetup-multi-arch-with-buildx/
-
-FROM alpine:3.12 AS builder-base
-
-ARG TARGETPLATFORM
-ARG BUILDPLATFORM
-
-ENV NAGIOS_HOME=/opt/nagios \
-    NAGIOS_USER=nagios \
-    NAGIOS_GROUP=nagios \
-    NAGIOS_CMDUSER=nagios \
-    NAGIOS_CMDGROUP=nagios \
-    NAGIOS_TIMEZONE=UTC \
-    NAGIOS_FQDN=nagios.example.com \
-    NAGIOSADMIN_USER=nagiosadmin \
-    NAGIOSADMIN_PASS=nagios \
-    NAGIOS_VERSION=4.5.10 \
-    NAGIOS_PLUGINS_VERSION=2.4.12 \
-    NRPE_VERSION=4.1.3 \
-    APACHE_LOCK_DIR=/var/run \
-    APACHE_LOG_DIR=/var/log/apache2
-
-
-RUN addgroup -S ${NAGIOS_GROUP} && \
-    adduser  -S ${NAGIOS_USER} -G ${NAGIOS_CMDGROUP} -g ${NAGIOS_USER} && \
-    apk update && \
-    apk add --no-cache git curl unzip apache2 apache2-utils rsyslog \
-                        php7 php7-gd php7-cli runit parallel ssmtp \
-                        libltdl libintl openssl-dev php7-apache2 procps tzdata \
-                        libldap mariadb-connector-c freeradius-client-dev libpq libdbi \
-                        lm-sensors perl net-snmp-perl perl-net-snmp perl-crypt-x509 \
-                        perl-timedate perl-libwww perl-text-glob samba-client openssh openssl \
-                        net-snmp-tools bind-tools gd gd-dev bash && \
-    addgroup -S apache ${NAGIOS_CMDGROUP}
-
-
-### ================================== ###
-###   STAGE 2 COMPILE NAGIOS SOURCES   ###
-### ================================== ###
-
-FROM builder-base AS builder-compile
-ARG TARGETPLATFORM
-ARG BUILDPLATFORM
-
-# Add dependencies required to build Nagios
-RUN apk update && \
-    apk add --no-cache build-base automake libtool autoconf py-docutils gnutls  \
-                        gnutls-dev g++ make alpine-sdk build-base gcc autoconf \
-                        gettext-dev linux-headers openssl-dev net-snmp net-snmp-tools \
-                        libcrypto1.1 libpq musl libldap libssl1.1 libdbi freeradius-client mariadb-connector-c \
-                        openssh-client bind-tools samba-client fping grep rpcbind \
-                        lm-sensors net-snmp-tools \
-                        file freeradius-client-dev libdbi-dev libpq linux-headers mariadb-dev \
-                        mariadb-connector-c-dev perl \
-                        net-snmp-dev openldap-dev openssl-dev postgresql-dev wget
-
-# Download Nagios core, plugins and nrpe sources
-RUN    cd /tmp && \
-       echo -n "Downloading Nagios ${NAGIOS_VERSION} source code: " && \
-       wget -O nagios-core.tar.gz "https://github.com/NagiosEnterprises/nagioscore/archive/refs/tags/nagios-${NAGIOS_VERSION}.tar.gz" && \
-       echo -n -e "OK\nDownloading Nagios plugins ${NAGIOS_PLUGINS_VERSION} source code: " && \
-       wget -O nagios-plugins.tar.gz "https://github.com/nagios-plugins/nagios-plugins/archive/refs/tags/release-${NAGIOS_PLUGINS_VERSION}.tar.gz" && \
-       echo -n -e "OK\nDownloading NRPE ${NRPE_VERSION} source code: " && \
-       wget -O nrpe.tar.gz "https://github.com/NagiosEnterprises/nrpe/archive/refs/tags/nrpe-${NRPE_VERSION}.tar.gz" && \
-       env && \
-       echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM !! == " && \
-       echo "OK"
-
-# Compile Nagios Core
-RUN    ls -l /tmp && cd /tmp && \
-       tar zxf nagios-core.tar.gz && \
-       tar zxf nagios-plugins.tar.gz && \
-       tar zxf nrpe.tar.gz && \
-       cd  "/tmp/nagioscore-nagios-${NAGIOS_VERSION}" && \
-       echo -e "\n ===========================\n  Configure Nagios Core\n ===========================\n" && \
-       ./configure \
-            --prefix=${NAGIOS_HOME}                  \
-            --exec-prefix=${NAGIOS_HOME}             \
-            --enable-event-broker                    \
-            --with-command-user=${NAGIOS_CMDUSER}    \
-            --with-command-group=${NAGIOS_CMDGROUP}  \
-            --with-nagios-user=${NAGIOS_USER}        \
-            --with-nagios-group=${NAGIOS_GROUP}      && \
-       : 'Apply patches to Nagios Core sources:' && \
-       echo -n "Replacing \"<sys\/poll.h>\" with \"<poll.h>\": " && \
-       sed -i 's/<sys\/poll.h>/<poll.h>/g' ./include/config.h && \
-       echo "OK" && \
-       echo -e "\n\n ===========================\n Compile Nagios Core\n ===========================\n" && \
-       make all && \
-       echo -e "\n\n ===========================\n  Install Nagios Core\n ===========================\n" && \
-       make install && \
-       make install-commandmode && \
-       make install-config && \
-       make install-webconf && \
-       echo -n "Nagios installed size: " && \
-       du -h -s ${NAGIOS_HOME}
-
-# Compile Nagios Plugins
-RUN    echo -e "\n\n ===========================\n  Configure Nagios Plugins\n ===========================\n" && \
-       ls -lia /tmp && cd /tmp && \
-       cd  /tmp/nagios-plugins-release-${NAGIOS_PLUGINS_VERSION} && \
-       ./autogen.sh && \
-       ./configure  --with-nagios-user=${NAGIOS_USER} \
-                    --with-nagios-group=${NAGIOS_USER} \
-                    --with-openssl \
-                    --prefix=${NAGIOS_HOME}                                 \
-                    --with-ping-command="/bin/ping -n -w %d -c %d %s"  \
-                    --with-ipv6                                             \
-                    --with-ping6-command="/bin/ping6 -n -w %d -c %d %s"  && \
-       echo "Nagios plugins configured: OK" && \
-       echo -n "Replacing \"<sys\/poll.h>\" with \"<poll.h>\": " && \
-       egrep -rl "\<sys\/poll.h\>" . | xargs sed -i 's/<sys\/poll.h>/<poll.h>/g' && \
-       egrep -rl "\"sys\/poll.h\"" . | xargs sed -i 's/"sys\/poll.h"/"poll.h"/g' && \
-       echo "OK" && \
-       echo -e "\n\n ===========================\n Compile Nagios Plugins\n ===========================\n" && \
-       make && \
-       echo "Nagios plugins compile successfully: OK" && \
-       echo -e "\n\n ===========================\nInstall Nagios Plugins\n ===========================\n" && \
-       make install && \
-       echo "Nagios plugins installed successfully: OK"
-
-# Compile NRPE
-RUN    echo -e "\n\n =====================\n  Configure NRPE\n =====================\n" && \
-       cd  /tmp/nrpe-nrpe-${NRPE_VERSION} && \
-       ./configure --enable-command-args \
-                    --with-nagios-user=${NAGIOS_USER} \
-                    --with-nagios-group=${NAGIOS_USER} \
-                    --with-ssl=/usr/bin/openssl \
-                    --with-ssl-lib=/usr/lib && \
-       echo "NRPE client configured: OK" && \
-       echo -e "\n\n ===========================\n  Compile NRPE\n ===========================\n" && \
-       # make all && \
-       make check_nrpe                                                          && \
-       echo "NRPE compiled successfully: OK" && \
-       echo -e "\n\n ===========================\n  Install NRPE\n ===========================\n" && \
-       # make install && \
-       cp src/check_nrpe ${NAGIOS_HOME}/libexec/                                && \
-       echo "NRPE installed successfully: OK" && \
-       echo -n "Final Nagios installed size: " && \
-       du -h -s ${NAGIOS_HOME}
-
-# Compile Nagios files
-# Create SSMTP configuration
-
-
-# RUN sed -i.bak 's/.*\=www\-data//g' /etc/apache2/envvars
-RUN export DOC_ROOT="DocumentRoot $(echo $NAGIOS_HOME/share)"                                        && \
-    sed -i "s,DocumentRoot.*,$DOC_ROOT," /etc/apache2/httpd.conf                                     && \
-    sed -i "s|^ *ScriptAlias.*$|ScriptAlias /cgi-bin $NAGIOS_HOME/sbin|g" /etc/apache2/httpd.conf    && \
-    sed -i 's/^\(.*\)#\(LoadModule cgi_module\)\(.*\)/\1\2\3/' /etc/apache2/httpd.conf               && \
-    echo "ServerName ${NAGIOS_FQDN}" >> /etc/apache2/httpd.conf
-
-RUN sed -i 's,/bin/mail,/usr/bin/mail,' ${NAGIOS_HOME}/etc/objects/commands.cfg  && \
-    sed -i 's,/usr/usr,/usr,'           ${NAGIOS_HOME}/etc/objects/commands.cfg  && \
-                                                                                    \
-    : '# Modify Nagios mail commands in order to work with SSMTP'         && \
-    sed -i 's/^.*command_line.*Host Alert.*$//g' /opt/nagios/etc/objects/commands.cfg && \
-    sed -i 's/^.*command_line.*Service Alert.*$//g' /opt/nagios/etc/objects/commands.cfg && \
-    sed -i '/notify-host-by-email/a command_line /usr/bin/printf "%b" "Subject: $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$\\n\\n***** Nagios *****\\n\\nNotification Type: $NOTIFICATIONTYPE$\\nHost: $HOSTNAME$\\nState: $HOSTSTATE$\\nAddress: $HOSTADDRESS$\\nInfo: $HOSTOUTPUT$\\n\\nDate/Time: $LONGDATETIME$\\n" | /usr/sbin/sendmail -v $CONTACTEMAIL$' ${NAGIOS_HOME}/etc/objects/commands.cfg  && \
-    sed -i '/notify-service-by-email/a command_line /usr/bin/printf "%b" "Subject: $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$\\n\\n***** Nagios *****\\n\\nNotification Type: $NOTIFICATIONTYPE$\\n\\nService: $SERVICEDESC$\\nHost: $HOSTALIAS$\\nAddress: $HOSTADDRESS$\\nState: $SERVICESTATE$\\n\\nDate/Time: $LONGDATETIME$\\n\\nAdditional Info:\\n\\n$SERVICEOUTPUT$\\n" | /usr/sbin/sendmail -v $CONTACTEMAIL$' ${NAGIOS_HOME}/etc/objects/commands.cfg && \
-                                                                                    \
-    : '# Modify etc/resource.cfg in order to include custom plugins directory'         && \
-    sed -i 's/^\(.*\)\(Sets .USER2. to be the path to\) event handlers.*$/\1\2 custom plugins directory/g' "${NAGIOS_HOME}"/etc/resource.cfg && \
-    sed -i 's;^#\([$]USER2[$]=\).*$;\1/opt/Custom-Nagios-Plugins;g' "${NAGIOS_HOME}"/etc/resource.cfg
-
-RUN echo "use_timezone=${NAGIOS_TIMEZONE}" >> ${NAGIOS_HOME}/etc/nagios.cfg && \
-    sed -i 's/date_format=us/date_format=iso8601/g' ${NAGIOS_HOME}/etc/nagios.cfg
-
-# Copy original configuration to /orig directory
-RUN mkdir -p /orig/apache2                     && \
-    cp -r /etc/apache2/*  /orig/apache2        && \
-    cp -r ${NAGIOS_HOME}/etc  /orig/etc        && \
-    cp -r ${NAGIOS_HOME}/var  /orig/var
-
-
-### ========================== ###
-### START OF ACTUAL DOCKERFILE ###
-### ========================== ###
-
-FROM builder-base
-
-
-LABEL name="Nagios" \
-      nagiosVersion=$NAGIOS_VERSION \
-      nagiosPluginsVersion=$NAGIOS_PLUGINS_VERSION \
-      nrpeVersion=$NRPE_VERSION \
-      homepage="https://www.nagios.com/" \
-      maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="31" \
-      org.opencontainers.image.title="Nagios" \
-      org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
-      org.opencontainers.image.vendor="Nagios" \
-      org.opencontainers.image.authors="Christos Manios <maniopaido@gmail.com>" \
-      org.opencontainers.image.licenses="MIT" \
-      org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
-      org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
-      org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="31"
-
-RUN mkdir -p ${NAGIOS_HOME}  && \
-    mkdir -p /orig/apache2
-
-WORKDIR ${NAGIOS_HOME}
-COPY --from=builder-compile ${NAGIOS_HOME} ${NAGIOS_HOME}
-
-COPY --from=builder-compile /orig /orig
-
-ADD overlay/ /
-
-# Make
-RUN chmod +x /usr/local/bin/start_nagios                 \
-            /etc/sv/apache/run                           \
-            /etc/sv/nagios/run                           \
-            /etc/sv/rsyslog/run                       && \
-            rm -rf /etc/sv/getty-5                    && \
-                                                         \
-            : '# enable all runit services'           && \
-            ln -s /etc/sv/* /etc/service              && \
-                                                         \
-            : '# Copy initial settings files'         && \
-            chown -R nagios:nagios ${NAGIOS_HOME}     && \
-            : '# Create special dirs'                 && \
-            (mkdir /run/apache2 || true)              && \
-            mkdir -p /var/spool/rsyslog               && \
-            : '# Copy Apache configuration'           && \
-            cp -Rp /orig/apache2/* /etc/apache2       && \
-            : '# Convert files to Unix format'        && \
-            dos2unix /etc/rsyslog.conf                && \
-            dos2unix /usr/local/bin/start_nagios      && \
-            dos2unix /etc/sv/**/run                   && \
-            dos2unix /etc/ssmtp/ssmtp.conf            && \
-            : '# Add mail symbolic links to ssmtp'   && \
-            ln -s $(which ssmtp) /bin/mail            && \
-            ln -s $(which ssmtp) /usr/sbin/mail
-
-
-EXPOSE 80
-
-VOLUME "${NAGIOS_HOME}/var" "${NAGIOS_HOME}/etc" "/var/log/apache2" "/opt/Custom-Nagios-Plugins"
-
-CMD [ "/usr/local/bin/start_nagios" ]

From 29a8acf349c9bbb750c94c2c0d7032bef6f9aa18 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Thu, 4 Dec 2025 13:01:51 +0200
Subject: [PATCH 02/11] Release build 32

---
 CHANGELOG.md | 12 ++++++++++++
 Dockerfile   |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd545ec..7edda73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@
 
 This Docker image contains more than one software (Nagios, Nagios plugins, NRPE, Apache HTTPD, etc.) with different versions. Hence we decided to name the releases with the naming `Build - <number>` which will have an incremental unsigned integer. In this document we will describe the contents of every image in every build.
 
+## Build 32 (2025-12-04)
+
+* Nagios core: v4.5.10
+* Nagios plugins: v2.4.12
+* NRPE: 4.1.3
+* Alpine:
+    * 3.23.0: `amd64`, `i386`, `arm64`,`arm/v6`, `arm/v7`
+
+### Features
+
+* Use Alpine 3.23 as base image for all architectures after [nagioscore #1025](https://github.com/NagiosEnterprises/nagioscore/issues/1025) was fixed and tested in `arm/v6` and `arm/v7`. ([#92](https://github.com/manios/docker-nagios/issues/92))
+
 ## Build 31 (2025-12-01)
 
 * Nagios core: v4.5.10
diff --git a/Dockerfile b/Dockerfile
index 7a212e3..27e6cb9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="32-snapshot" \
+      build="32" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="32-snapshot"
+      org.opencontainers.image.version="32"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From 78dff4a2d0bd8d0d2a82eb5f007244eb98f82ce9 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Thu, 15 Jan 2026 10:34:09 +0200
Subject: [PATCH 03/11] Upgrade to Nagios Core to 4.5.11 (#99)

---
 Dockerfile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 27e6cb9..ae32908 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ ENV NAGIOS_HOME=/opt/nagios \
     NAGIOS_FQDN=nagios.example.com \
     NAGIOSADMIN_USER=nagiosadmin \
     NAGIOSADMIN_PASS=nagios \
-    NAGIOS_VERSION=4.5.10 \
+    NAGIOS_VERSION=4.5.11 \
     NAGIOS_PLUGINS_VERSION=2.4.12 \
     NRPE_VERSION=4.1.3 \
     APACHE_LOCK_DIR=/var/run \
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="32" \
+      build="33-snapshot" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="32"
+      org.opencontainers.image.version="33-snapshot"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From 5acca589780201bbe1b1682b1c4e9b935a2e5797 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Thu, 15 Jan 2026 10:34:24 +0200
Subject: [PATCH 04/11] Release build 33

---
 CHANGELOG.md | 12 ++++++++++++
 Dockerfile   |  4 ++--
 README.md    |  2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7edda73..994ad30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@
 
 This Docker image contains more than one software (Nagios, Nagios plugins, NRPE, Apache HTTPD, etc.) with different versions. Hence we decided to name the releases with the naming `Build - <number>` which will have an incremental unsigned integer. In this document we will describe the contents of every image in every build.
 
+## Build 33 (2026-01-15)
+
+* Nagios core: v4.5.11
+* Nagios plugins: v2.4.12
+* NRPE: 4.1.3
+* Alpine:
+    * 3.23.2: `amd64`, `i386`, `arm64`,`arm/v6`, `arm/v7`
+
+### Features
+
+* Upgrade to Nagios Core `4.5.11`. ([#99](https://github.com/manios/docker-nagios/issues/99))
+
 ## Build 32 (2025-12-04)
 
 * Nagios core: v4.5.10
diff --git a/Dockerfile b/Dockerfile
index ae32908..ced64ad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="33-snapshot" \
+      build="33" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="33-snapshot"
+      org.opencontainers.image.version="33"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2
diff --git a/README.md b/README.md
index d2055bf..510bef1 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Build Status:
 
 ## Supported tags and respective `Dockerfile` links
 
-* `4.5.10`, `4.5`, `latest` [(4.5.10/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
+* `4.5.11`, `4.5`, `latest` [(4.5.11/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
 
 For more information about the image versions you may refer to the [CHANGELOG](https://github.com/manios/docker-nagios/blob/master/CHANGELOG.md)
 

From a4227c8de4c7ac5b83aa432911e5e62a3157549d Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Thu, 26 Mar 2026 17:19:17 +0200
Subject: [PATCH 05/11] Upgrade to Nagios Core to 4.5.12 (#100)

---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index ced64ad..fef00f5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ ENV NAGIOS_HOME=/opt/nagios \
     NAGIOS_FQDN=nagios.example.com \
     NAGIOSADMIN_USER=nagiosadmin \
     NAGIOSADMIN_PASS=nagios \
-    NAGIOS_VERSION=4.5.11 \
+    NAGIOS_VERSION=4.5.12 \
     NAGIOS_PLUGINS_VERSION=2.4.12 \
     NRPE_VERSION=4.1.3 \
     APACHE_LOCK_DIR=/var/run \

From 952e22f7ac47cbe7f73eca8688ec6653720ac3da Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Thu, 26 Mar 2026 17:19:39 +0200
Subject: [PATCH 06/11] Release build 34

---
 CHANGELOG.md | 12 ++++++++++++
 Dockerfile   |  4 ++--
 README.md    |  2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 994ad30..d9338a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@
 
 This Docker image contains more than one software (Nagios, Nagios plugins, NRPE, Apache HTTPD, etc.) with different versions. Hence we decided to name the releases with the naming `Build - <number>` which will have an incremental unsigned integer. In this document we will describe the contents of every image in every build.
 
+## Build 34 (2026-03-26)
+
+* Nagios core: v4.5.12
+* Nagios plugins: v2.4.12
+* NRPE: 4.1.3
+* Alpine:
+    * 3.23.2: `amd64`, `i386`, `arm64`,`arm/v6`, `arm/v7`
+
+### Features
+
+* Upgrade to Nagios Core `4.5.12`. ([#100](https://github.com/manios/docker-nagios/issues/100))
+
 ## Build 33 (2026-01-15)
 
 * Nagios core: v4.5.11
diff --git a/Dockerfile b/Dockerfile
index fef00f5..6d17c92 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="33" \
+      build="34" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="33"
+      org.opencontainers.image.version="34"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2
diff --git a/README.md b/README.md
index 510bef1..4e01769 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Build Status:
 
 ## Supported tags and respective `Dockerfile` links
 
-* `4.5.11`, `4.5`, `latest` [(4.5.11/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
+* `4.5.12`, `4.5`, `latest` [(4.5.12/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
 
 For more information about the image versions you may refer to the [CHANGELOG](https://github.com/manios/docker-nagios/blob/master/CHANGELOG.md)
 

From 1ccea2191cbcb067e3f2dca7a46c6f897f2dc806 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Wed, 1 Apr 2026 14:25:51 +0300
Subject: [PATCH 07/11] Upgrade to Nagios Plugins 2.5.0 (#101)

---
 Dockerfile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 6d17c92..8d32bda 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,7 @@ ENV NAGIOS_HOME=/opt/nagios \
     NAGIOSADMIN_USER=nagiosadmin \
     NAGIOSADMIN_PASS=nagios \
     NAGIOS_VERSION=4.5.12 \
-    NAGIOS_PLUGINS_VERSION=2.4.12 \
+    NAGIOS_PLUGINS_VERSION=2.5 \
     NRPE_VERSION=4.1.3 \
     APACHE_LOCK_DIR=/var/run \
     APACHE_LOG_DIR=/var/log/apache2
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="34" \
+      build="35-snapshot" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="34"
+      org.opencontainers.image.version="35-snapshot"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From b0164053a36b2224debb308b150a9127c12e398c Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Wed, 1 Apr 2026 14:29:04 +0300
Subject: [PATCH 08/11] Release build 35

---
 CHANGELOG.md | 12 ++++++++++++
 Dockerfile   |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9338a0..0df6b6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@
 
 This Docker image contains more than one software (Nagios, Nagios plugins, NRPE, Apache HTTPD, etc.) with different versions. Hence we decided to name the releases with the naming `Build - <number>` which will have an incremental unsigned integer. In this document we will describe the contents of every image in every build.
 
+## Build 35 (2026-04-03)
+
+* Nagios core: v4.5.12
+* Nagios plugins: v2.5.0
+* NRPE: 4.1.3
+* Alpine:
+    * 3.23.2: `amd64`, `i386`, `arm64`,`arm/v6`, `arm/v7`
+
+### Features
+
+* Upgrade to Nagios Plugins to `2.5.0`. ([#101](https://github.com/manios/docker-nagios/issues/101))
+
 ## Build 34 (2026-03-26)
 
 * Nagios core: v4.5.12
diff --git a/Dockerfile b/Dockerfile
index 8d32bda..8675b5e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="35-snapshot" \
+      build="35" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="35-snapshot"
+      org.opencontainers.image.version="35"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From 832f18de01ee944d5a6ae8cc9a4f4c86fdd73d42 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Fri, 29 May 2026 16:58:22 +0300
Subject: [PATCH 09/11] Upgrade to Nagios Core to 4.5.13 (#102)

---
 Dockerfile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 8675b5e..cebccc4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ ENV NAGIOS_HOME=/opt/nagios \
     NAGIOS_FQDN=nagios.example.com \
     NAGIOSADMIN_USER=nagiosadmin \
     NAGIOSADMIN_PASS=nagios \
-    NAGIOS_VERSION=4.5.12 \
+    NAGIOS_VERSION=4.5.13 \
     NAGIOS_PLUGINS_VERSION=2.5 \
     NRPE_VERSION=4.1.3 \
     APACHE_LOCK_DIR=/var/run \
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="35" \
+      build="36-snapshot" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="35"
+      org.opencontainers.image.version="36-snapshot"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From 6c680597aacc87d068701443988db7be83b80452 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Fri, 12 Jun 2026 12:01:07 +0300
Subject: [PATCH 10/11] Release build 36

---
 CHANGELOG.md | 12 ++++++++++++
 Dockerfile   |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0df6b6f..ab8b621 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@
 
 This Docker image contains more than one software (Nagios, Nagios plugins, NRPE, Apache HTTPD, etc.) with different versions. Hence we decided to name the releases with the naming `Build - <number>` which will have an incremental unsigned integer. In this document we will describe the contents of every image in every build.
 
+## Build 36 (2026-06-12)
+
+* Nagios core: v4.5.13
+* Nagios plugins: v2.5.0
+* NRPE: 4.1.3
+* Alpine:
+    * 3.23.4: `amd64`, `i386`, `arm64`,`arm/v6`, `arm/v7`
+
+### Features
+
+* Upgrade to Nagios Core `4.5.13`. ([#102](https://github.com/manios/docker-nagios/issues/102))
+
 ## Build 35 (2026-04-03)
 
 * Nagios core: v4.5.12
diff --git a/Dockerfile b/Dockerfile
index cebccc4..48fe474 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -190,7 +190,7 @@ LABEL name="Nagios" \
       nrpeVersion=$NRPE_VERSION \
       homepage="https://www.nagios.com/" \
       maintainer="Christos Manios <maniopaido@gmail.com>" \
-      build="36-snapshot" \
+      build="36" \
       org.opencontainers.image.title="Nagios" \
       org.opencontainers.image.description="Nagios, the Industry Standard In IT Infrastructure Monitoring" \
       org.opencontainers.image.vendor="Nagios" \
@@ -199,7 +199,7 @@ LABEL name="Nagios" \
       org.opencontainers.image.url="https://hub.docker.com/r/manios/nagios" \
       org.opencontainers.image.source="https://github.com/manios/docker-nagios" \
       org.opencontainers.image.documentation="https://github.com/manios/docker-nagios/blob/master/README.md" \
-      org.opencontainers.image.version="36-snapshot"
+      org.opencontainers.image.version="36"
 
 RUN mkdir -p ${NAGIOS_HOME}  && \
     mkdir -p /orig/apache2

From f2a266a0b854dc161dd5b3e847723f4cf00f2188 Mon Sep 17 00:00:00 2001
From: Christos Manios <maniopaido@gmail.com>
Date: Fri, 12 Jun 2026 12:07:04 +0300
Subject: [PATCH 11/11] Update readme for Nagios version 4.5.13

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 4e01769..aa8295a 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Build Status:
 
 ## Supported tags and respective `Dockerfile` links
 
-* `4.5.12`, `4.5`, `latest` [(4.5.12/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
+* `4.5.13`, `4.5`, `latest` [(4.5.13/Dockerfile)](https://github.com/manios/docker-nagios/blob/master/Dockerfile)
 
 For more information about the image versions you may refer to the [CHANGELOG](https://github.com/manios/docker-nagios/blob/master/CHANGELOG.md)