Reduce operator image build temp usage

Author: jiangpengcheng

Dockerfile

@@ -23,7 +23,7 @@ COPY controllers/ controllers/
 COPY utils/ utils/
 
 # Build
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -a -o manager main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -p=2 -o manager main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details

operator.Dockerfile

@@ -17,7 +17,7 @@ COPY pkg/ pkg/
 COPY controllers/ controllers/
 COPY utils/ utils/
 
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -a -trimpath -o /workspace/manager main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -p=2 -trimpath -o /workspace/manager main.go
 
 FROM alpine:3.21
 

redhat.Dockerfile

@@ -23,7 +23,7 @@ COPY controllers/ controllers/
 COPY utils/ utils/
 
 # Build
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -a -o manager main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} GO111MODULE=on go build -p=2 -o manager main.go
 
 # Use ubi image as the base image which is required by the red hat certification.
 # Base on the image size, the order is ubi > ubi-minimal > ubi-micro.