Fix iDRAC tools Docker package install

Dockerfile

@@ -31,12 +31,18 @@ RUN apt-get update \
 
 COPY iDRACTools /tmp/iDRACTools
 
+# Dell iDRAC Tools packages try to start HAPI with systemctl during postinst.
+# The image only needs remote racadm/ipmitool, so a build-time shim is enough.
+RUN printf '#!/bin/sh\nexit 0\n' > /usr/bin/systemctl \
+    && chmod +x /usr/bin/systemctl
+
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
         /tmp/iDRACTools/racadm/${IDRAC_TOOLS_UBUNTU_VERSION}/x86_64/srvadmin-hapi_*.deb \
         /tmp/iDRACTools/racadm/${IDRAC_TOOLS_UBUNTU_VERSION}/x86_64/srvadmin-idracadm7_*.deb \
         /tmp/iDRACTools/racadm/${IDRAC_TOOLS_UBUNTU_VERSION}/x86_64/srvadmin-idracadm8_*.deb \
         /tmp/iDRACTools/ipmitool/${IDRAC_TOOLS_UBUNTU_VERSION}_x86_64/ipmitool_*.deb \
+    && rm -f /usr/bin/systemctl \
     && rm -rf /tmp/iDRACTools /var/lib/apt/lists/*
 
 RUN python3 -m venv /opt/venv