operator-image use the specific version

Author: zlianzhuang

image/postgres-operator/Dockerfile

@@ -10,7 +10,7 @@ COPY postgres /src
 RUN python -m pip install --trusted-host mirrors.aliyun.com --upgrade pip \
 		-i http://mirrors.aliyun.com/pypi/simple/
 RUN python -m pip install --trusted-host mirrors.aliyun.com --no-cache-dir \
-		Kubernetes kopf wrapt paramiko \
+		Kubernetes==21.7.0 kopf==1.35.5 wrapt paramiko \
 		-i http://mirrors.aliyun.com/pypi/simple/
 
 ENTRYPOINT ["kopf", "run", "--standalone", "-A"]