Merge branch 'ol9-image' into 'main'

Restore use of OL 9-slim

See merge request weblogic-cloud/weblogic-monitoring-exporter!304

Author: rjeberhard

Dockerfile

@@ -9,27 +9,17 @@ ENV JAVA_URL_AARCH64="https://download.oracle.com/java/25/latest/jdk-25_linux-aa
 RUN set -eux; \
     microdnf -y install gzip tar; \
     MACHINE_TYPE=`uname -m`; \
-    mkdir -p /dynamic/lib64; \
-    mkdir -p /dynamic/lib; \
-    cp /lib64/libz.so.1 /dynamic/lib64; \
-    cp /lib64/librt.so.1 /dynamic/lib64; \
-    cp /lib64/libm.so.6 /dynamic/lib64; \
-    cp /lib64/libpthread.so.0 /dynamic/lib64; \
-    cp /lib64/libdl.so.2 /dynamic/lib64; \
-    cp /lib64/libc.so.6 /dynamic/lib64; \
     if [ ${MACHINE_TYPE} == 'x86_64' ]; then \
       JAVA_URL=$JAVA_URL_X64; \
-      cp /lib64/ld-linux-x86-64.so.2 /dynamic/lib64; \
     else \
       JAVA_URL=$JAVA_URL_AARCH64; \
-      cp /lib/ld-linux-aarch64.so.1 /dynamic/lib; \
     fi; \
     curl -fL -o jdk.tar.gz "$JAVA_URL"; \
     mkdir -p /jdk; \
     tar --extract --file jdk.tar.gz --directory /jdk --strip-components 1; \
-    /jdk/bin/jlink --verbose --compress 2 --strip-java-debug-attributes --no-header-files --no-man-pages --output custom-jre --add-modules java.base,java.logging,java.instrument,java.management,java.naming,java.net.http,java.security.jgss,java.sql,jdk.attach,jdk.jdi,jdk.jfr,jdk.management,jdk.management.agent,jdk.management.jfr,jdk.net,jdk.unsupported,jdk.crypto.cryptoki,jdk.crypto.ec,jdk.zipfs,jdk.jcmd
+    /jdk/bin/jlink --verbose --compress 2 --strip-java-debug-attributes --no-header-files --no-man-pages --output jre --add-modules java.base,java.logging,java.instrument,java.management,java.naming,java.net.http,java.security.jgss,java.sql,jdk.attach,jdk.jdi,jdk.jfr,jdk.management,jdk.management.agent,jdk.management.jfr,jdk.net,jdk.unsupported,jdk.crypto.cryptoki,jdk.crypto.ec,jdk.zipfs,jdk.jcmd
 
-FROM scratch
+FROM ghcr.io/oracle/oraclelinux:9-slim
 
 LABEL "org.opencontainers.image.authors"="Ryan Eberhard <[email protected]>, Russell Gold <[email protected]>" \
       "org.opencontainers.image.url"="https://github.com/oracle/weblogic-monitoring-exporter" \
@@ -41,13 +31,25 @@ LABEL "org.opencontainers.image.authors"="Ryan Eberhard <[email protected]
 
 ENV LANG="en_US.UTF-8"
 
-COPY --from=jre-build custom-jre /opt/java
-COPY --from=jre-build /dynamic/lib64 /lib64
-COPY --from=jre-build /dynamic/lib /lib
+COPY --from=jre-build /jre jre
+
+# Install Java and make the operator run with a non-root user id (1000 is the `oracle` user)
+RUN set -eux; \
+    microdnf -y update; \
+    microdnf clean all; \
+    for bin in /jre/bin/*; do \
+        base="$(basename "$bin")"; \
+        [ ! -e "/usr/bin/$base" ]; \
+        alternatives --install "/usr/bin/$base" "$base" "$bin" 20000; \
+    done; \
+    java -Xshare:dump; \
+    useradd -M -s /bin/bash -g root -u 1000 oracle
+
+USER oracle
 
 COPY wls-exporter-sidecar/target/wls-exporter-sidecar.jar /app/wls-exporter-sidecar.jar
 COPY wls-exporter-sidecar/target/libs /app/libs
 
-ENTRYPOINT ["/opt/java/bin/java", "-jar", "/app/wls-exporter-sidecar.jar"]
+ENTRYPOINT ["/jre/bin/java", "-jar", "/app/wls-exporter-sidecar.jar"]
 
 EXPOSE 8080