Add env var to control vlogger base image (#884)

Makefile

@@ -102,6 +102,8 @@ export VLOGGER_IMG
 # If the current leg in the CI tests is leg-9
 LEG9 ?= no
 export LEG9
+# What alpine image does the vlogger image use
+VLOGGER_BASE_IMG?=alpine
 # What version of alpine does the vlogger image use
 VLOGGER_ALPINE_VERSION?=3.19
 # The port number for the local registry
@@ -390,10 +392,11 @@ docker-build-operator: manifests generate fmt vet ## Build operator docker image
 
 .PHONY: docker-build-vlogger
 docker-build-vlogger:  ## Build vertica logger docker image
-	docker pull alpine:${VLOGGER_ALPINE_VERSION} # Ensure we have the latest alpine version
+	docker pull ${VLOGGER_BASE_IMG}:${VLOGGER_ALPINE_VERSION} # Ensure we have the latest alpine version
 	docker buildx build \
 		-t ${VLOGGER_IMG} \
 		--load \
+		--build-arg BASE_IMG=${VLOGGER_BASE_IMG} \
 		--build-arg ALPINE_VERSION=${VLOGGER_ALPINE_VERSION} \
 		-f docker-vlogger/Dockerfile .
 

docker-vlogger/Dockerfile

@@ -15,7 +15,8 @@
 # follow the idiomatic way in Kubernetes of logging to stdout.
 
 ARG ALPINE_VERSION
-FROM alpine:${ALPINE_VERSION}
+ARG BASE_IMG
+FROM ${BASE_IMG}:${ALPINE_VERSION}
 
 # Tini - A tiny but valid init for containers
 RUN apk add --no-cache tini