add obdiag build docker

.github/workflows/build_base_docker.yml

@@ -35,4 +35,4 @@ jobs:
           file: build/Dockerfile
           push: true
           tags: |
-            ${{ vars.DOCKER_PUSH_BASE }}/oceanbase/obdiag-builder:latest
+            ${{ vars.DOCKER_PUSH_BASE }}/oceanbase/obdiag-builder:latest

build/Dockerfile

@@ -0,0 +1,12 @@
+FROM centos:7
+RUN rm -rf /etc/yum.repos.d/*
+RUN curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
+RUN yum install -y wget rpm-build
+RUN wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh --no-check-certificate
+RUN sh Miniconda3-latest-Linux-x86_64.sh -p /opt/miniconda3 -b
+RUN export PATH=/opt/miniconda3/bin:$PATH
+RUN /opt/miniconda3/bin/conda init
+RUN /opt/miniconda3/bin/conda create --name obdiag python=3.8 -y
+RUN source /opt/miniconda3/bin/activate obdiag
+RUN /opt/miniconda3/envs/obdiag/bin/python3.8  -m pip install --upgrade pip setuptools wheel
+RUN yum install -y gcc gcc-c++ make