Change image build process

build-docker-images/wazuh-manager/Dockerfile

@@ -1,53 +1,88 @@
 # Wazuh Docker Copyright (C) 2017, Wazuh Inc. (License GPLv2)
-FROM amazonlinux:2023
 
-RUN rm /bin/sh && ln -s /bin/bash /bin/sh
+################################################################################
+# Build stage 0 (builder):
+# Install Wazuh Manager RPM, configure directories, prepare permanent data,
+# and download tini (static PID-1 init shim).
+################################################################################
+FROM amazonlinux:2023 AS builder
 
 ARG WAZUH_VERSION
-ARG S6_VERSION="v2.2.0.3"
+ARG TINI_VERSION="v0.19.0"
 ARG TARGETARCH
 ARG wazuh_manager_x86_64_rpm
 ARG wazuh_manager_aarch64_rpm
 
+# Prepare permanent data config needed by permanent_data.sh at build time
+COPY config/permanent_data.env config/permanent_data.sh /
+
 RUN RPM_ARCH="x86_64" && \
     if [ "${TARGETARCH}" = "arm64" ]; then RPM_ARCH="aarch64"; fi && \
     URL_VAR="wazuh_manager_${RPM_ARCH}_rpm" && \
     manager_url="${!URL_VAR}" && \
-    dnf install curl-minimal xz gnupg tar gzip openssl findutils procps -y &&\
+    dnf install curl-minimal xz gnupg tar gzip openssl findutils procps shadow-utils -y && \
     dnf clean all && \
     curl -o /wazuh-manager.rpm "${manager_url}" && \
     dnf install /wazuh-manager.rpm -y && \
     rm -rf /wazuh-manager.rpm && \
     dnf clean all && \
-    S6_ARCH="amd64" && \
-    if [ "${TARGETARCH}" = "arm64" ]; then S6_ARCH="aarch64"; fi && \
-    curl --fail --silent -L https://github.com/just-containers/s6-overlay/releases/download/${S6_VERSION}/s6-overlay-${S6_ARCH}.tar.gz \
-    -o /tmp/s6-overlay-${S6_ARCH}.tar.gz && \
-    tar xzf /tmp/s6-overlay-${S6_ARCH}.tar.gz -C / --exclude="./bin" && \
-    tar xzf /tmp/s6-overlay-${S6_ARCH}.tar.gz -C /usr ./bin && \
-    rm  /tmp/s6-overlay-${S6_ARCH}.tar.gz && \
-    rm -f /var/wazuh-manager/etc/sslmanager.key && \
-    rm -f /var/wazuh-manager/etc/sslmanager.cert
-
-COPY config/etc/ /etc/
-# Prepare permanent data
-# Sync calls are due to https://github.com/docker/docker/issues/9547
-
-COPY config/permanent_data.env config/permanent_data.sh /
-
-#Make mount directories for keep permissions
-
-RUN mkdir -p /var/wazuh-manager/var/multigroups && \
+    # Set up required directories with correct ownership
+    mkdir -p /var/wazuh-manager/var/multigroups && \
     chown root:wazuh-manager /var/wazuh-manager/var/multigroups && \
     chmod 770 /var/wazuh-manager/var/multigroups && \
     mkdir -p /var/wazuh-manager/etc/certs && \
     chown wazuh-manager:wazuh-manager /var/wazuh-manager/etc/certs && \
     chmod 500 /var/wazuh-manager/etc/certs && \
-    chmod 755 /permanent_data.sh && \
+    rm -f /var/wazuh-manager/etc/sslmanager.key && \
+    rm -f /var/wazuh-manager/etc/sslmanager.cert
+
+# Prepare permanent data snapshot (sync calls: https://github.com/docker/docker/issues/9547)
+RUN chmod 755 /permanent_data.sh && \
     sync && /permanent_data.sh && \
     sync && rm /permanent_data.sh
 
+# Download tini static binary (no external library dependencies)
+RUN TINI_ARCH="amd64" && \
+    if [ "${TARGETARCH}" = "arm64" ]; then TINI_ARCH="arm64"; fi && \
+    curl --fail --silent -L \
+    https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static-${TINI_ARCH} \
+    -o /usr/local/bin/tini && \
+    chmod +x /usr/local/bin/tini
+
+################################################################################
+# Build stage 1 (the actual Wazuh Manager image):
+# Copy Wazuh Manager and tini from builder. Install only runtime dependencies.
+################################################################################
+FROM amazonlinux:2023
+
+RUN rm /bin/sh && ln -s /bin/bash /bin/sh
+
+# Install only runtime dependencies (no curl, tar, gzip, xz, or full dnf stack)
+RUN dnf install openssl findutils procps shadow-utils -y && \
+    dnf clean all && \
+    getent group wazuh-manager || groupadd -r -g 999 wazuh-manager && \
+    getent passwd wazuh-manager || useradd --system \
+        --uid 999 \
+        --no-create-home \
+        --home-dir /var/wazuh-manager \
+        --gid wazuh-manager \
+        --shell /sbin/nologin \
+        wazuh-manager
+
+# Copy Wazuh Manager installation (includes permanent data snapshot)
+COPY --from=builder /var/wazuh-manager /var/wazuh-manager
+
+# Copy tini static binary
+COPY --from=builder /usr/local/bin/tini /usr/local/bin/tini
+
+# Copy entrypoint, init scripts and runtime config
+COPY config/entrypoint.sh /entrypoint.sh
+COPY config/etc/ /etc/
+COPY config/permanent_data.env /
+
+RUN chmod 755 /entrypoint.sh
+
 # Services ports
 EXPOSE 55000/tcp 1514/tcp 1515/tcp 514/udp 1516/tcp
 
-ENTRYPOINT [ "/init" ]
+ENTRYPOINT ["/usr/local/bin/tini", "--", "/entrypoint.sh"]