Docker入门之启动脚本

假设已安装好一个spark镜像 ubuntu:spark

如何在启动容器时就启动 hadoop/ spark 等集群 ( 命令运行 start-yarn.sh,  start-all.sh)

只需要编写一个 shell 脚本

由于主机无法获取容器的环境，所以使用 docker run 或 docker exec 等方法在进入容器时执行命令 （start-yarn.sh...）会失败：NOT FOUND COMMAND，因此我采用了一个比较 low 的办法，在 run 或 exec 命令中将 hadoop 和 spark 的执行目录导入容器环境。

1. 进入容器获取环境

   birenjianmodeMacBook-Pro:spark birenjianmo$ docker run -it ubuntu:spark
   root@99199dbfe94c:/# echo $PATH
   /root/soft/apache/spark/spark-2.2.0-bin-hadoop2.7/bin:/root/soft/apache/spark/spark-2.2.0-bin-hadoop2.7/sbin:/opt/temp/jdk1.8.0_211/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/soft/apache/zookeeper/zookeeper-3.4.9/bin:/root/soft/apache/hadoop/hadoop-2.7.7/bin:/root/soft/apache/hadoop/hadoop-2.7.7/sbin:/root/soft/scala/scala-2.11.11/bin:/root/soft/apache/hive/apache-hive-2.3.4-bin/bin

2. 在主机编写 shell 脚本，启动容器时就导入环境执行 .sh 就不会报错

   PATH="/root/soft/apache/spark/spark-2.2.0-bin-hadoop2.7/bin:/root/soft/apache/spark/spark-2.2.0-bin-hadoop2.7/sbin:/opt/temp/jdk1.8.0_211/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/soft/apache/zookeeper/zookeeper-3.4.9/bin:/root/soft/apache/hadoop/hadoop-2.7.7/bin:/root/soft/apache/hadoop/hadoop-2.7.7/sbin:/root/soft/scala/scala-2.11.11/bin:/root/soft/apache/hive/apache-hive-2.3.4-bin/bin"docker run -itd -h master --name master -p 50070:50070 -p 50030:50030 -p 58088:8088 -p 58080:8080 ubuntu:spark /bin/bash -c "export PATH=$PATH:$PATH && /root/soft/shell/run_master.sh";