How to connect master and slaves in Apache-Spark? (Standalone Mode)

Question

I\'m using Spark Standalone Mode tutorial page to install Spark in Standalone mode.

1- I have started a master by:

./sbin/start-master.sh

Answer 1

In my case, using spark 2.4.7 in standalone mode, I've created a passwordless ssh key using ssh-keygen, but still got asked for worker password when starting the cluster.

What I did was follow the instructions here https://www.cyberciti.biz/faq/how-to-set-up-ssh-keys-on-linux-unix/

This line solved the problem: ssh-copy-id -i $HOME/.ssh/id_rsa.pub user@server-ip

Answer 2

You can set export SPARK_LOCAL_IP="You-IP" #to set the IP address Spark binds to on this node in $SPARK_HOME/conf/spark-env.sh

Answer 3

I usually start from spark-env.sh template. And I set, properties that I need. For simple cluster you need:

• SPARK_MASTER_IP

Then, create a file called "slaves" in the same directory as spark-env.sh and slaves ip's (one per line). Assure you reach all slaves through ssh.

Finally, copy this configuration in every machine of your cluster. Then start the entire cluster executing start-all.sh script and try spark-shell to check your configuration.

> sbin/start-all.sh
> bin/spark-shell