Set root password and allow root ssh login

Dockerfile

@@ -48,6 +48,8 @@ COPY startup.sh $HADOOP_HOME/startup.sh
 COPY jupyter_password.exp /jupyter_password.exp
 COPY hadoop_config /usr/local/hadoop/etc/hadoop
 COPY ssh_config/config /root/.ssh/
+COPY ssh_config/sshd_root_login.conf /etc/ssh/sshd_config.d/
+COPY root_password.exp /root_password.exp
 
 RUN chmod 755 -R $HADOOP_HOME
 RUN mkdir /code
@@ -84,6 +86,6 @@ ENV JUPYTER_PORT=8888
 
 RUN pip install snakebite-py3 protobuf==3.20.*
 
-EXPOSE 9870 9864 9868 8088 9000 8042 4040 8888
+EXPOSE 22 9870 9864 9868 8088 9000 8042 4040 8888
 
 ENTRYPOINT bash /usr/local/hadoop/startup.sh

root_password.exp

@@ -0,0 +1,9 @@
+set timeout -1
+spawn passwd
+match_max 100000
+expect -exact "New password: "
+send -- "$::env(ROOT_PASSWORD)\r"
+expect -exact "\r
+Retype new password: "
+send -- "$::env(ROOT_PASSWORD)\r"
+expect eof

ssh_config/sshd_root_login.conf

@@ -0,0 +1 @@
+PermitRootLogin yes

startup.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+echo "Setting root password..."
+expect /root_password.exp
+
 echo "Starting SSH daemon..."
 service ssh start