fix bug #2023 (#3871)

* fix bug #2023

* 配置canal-adapter，docker生成脚本

client-adapter/docker/Dockerfile

@@ -0,0 +1,22 @@
+# 本脚本参考slpcat的docker镜像生成脚本
+# 链接：https://github.com/slpcat/docker-images/tree/master/bigdata/canal/debian10-canal-adapter-jdk8
+FROM slpcat/openjdk:8
+
+MAINTAINER 若虚 <slpcat@qq.com>
+
+# install canal-adapter
+COPY canal.adapter-*.tar.gz /tmp/
+
+RUN \
+    mkdir -p /opt/canal-adapter && \
+    tar -zxf /tmp/canal.adapter-*.tar.gz -C /opt/canal-adapter && \
+    rm -r /tmp/canal.adapter-*.tar.gz
+
+COPY startup.sh /opt/canal-adapter/bin/startup.sh
+
+# 8081 exporter
+EXPOSE 8081
+
+WORKDIR /opt/canal-adapter
+
+CMD ["sh", "-c", "./bin/startup.sh"]