Update for RockyLinux 8

Signed-off-by: Yanchao Lu <[email protected]>

Author: chzblych

jenkins/BuildDockerImage.groovy

@@ -285,6 +285,10 @@ def buildImage(config, imageKeyToTag)
         def TRITON_IMAGE = sh(script: "cd ${LLM_ROOT} && grep 'ARG TRITON_IMAGE=' docker/Dockerfile.multi | grep -o '=.*' | tr -d '=\"'", returnStdout: true).trim()
         def TRITON_BASE_TAG = sh(script: "cd ${LLM_ROOT} && grep 'ARG TRITON_BASE_TAG=' docker/Dockerfile.multi | grep -o '=.*' | tr -d '=\"'", returnStdout: true).trim()
 
+        if (target == "rockylinux8") {
+            BASE_IMAGE = sh(script: "cd ${LLM_ROOT} && grep 'rockylinux8_%: BASE_IMAGE =' docker/Makefile | grep -o '=.*' | tr -d '=\"'", returnStdout: true).trim()
+        }
+
         // Replace the base image and triton image with the internal mirror
         BASE_IMAGE = BASE_IMAGE.replace("nvcr.io/", "urm.nvidia.com/docker/")
         TRITON_IMAGE = TRITON_IMAGE.replace("nvcr.io/", "urm.nvidia.com/docker/")