Member Avatar for Pavan_6

Hi I am trying to setup a multinode Hadoop cluster and I would like to know, how to install hadoop in all the slaves machine from the master machine itself.

Ideally, all the slave machines should have same configuration, is there a way to provide instructions to all the slaves simultaneously?

for example, if I say "sudo apt-get install git" from my master machine, it should install git on all the slave machines. appreciate your help on this

  • 4 Contributors
  • 5 Replies
  • 210 Views
  • 9 Months Discussion Span
  • Latest Post Latest Post by Pavan_6

Dani AI

Generated

Quick summary: for ad‑hoc multi-node work the interactive tmux approach that suggested is exactly the right quick win — 's follow-up confirms it. It mirrors keystrokes to many shells at once, which is great for testing or one-off fixes but fragile for repeatable provisioning.

For predictable, idempotent installs across dozens or hundreds of slaves, use an orchestration/configuration tool. Ansible is a lightweight, agentless option (SSH-based) that maps well to apt/Debian workflows; SaltStack (mentioned by ) and vendor tooling such as Cloudera Manager (mentioned by ) are valid alternatives depending on scale and need. These tools handle package installs, templated configs, service control and rollback much more safely than typing into multiple shells.

A minimal Ansible example (inventory group = hadoop_slaves) to install packages and deploy a Hadoop tarball:

---
- hosts: hadoop_slaves
  become: yes
  tasks:
    - name: ensure Java and rsync present
      apt:
        name: ['openjdk-11-jdk','rsync']
        state: present
        update_cache: yes

    - name: deploy Hadoop tarball
      unarchive:
        src: /srv/artifacts/hadoop-VERSION.tar.gz
        dest: /opt
        remote_src: yes

Operational checklist and gotchas: enable key-based SSH from the master so automation runs non-interactively (public keys in slaves' authorized_keys); keep Java/JDK versions identical; create a single Hadoop system user and set correct ownership on install directories; ensure hostnames resolve (DNS or /etc/hosts) and clocks are synced (ntp/chrony); open required ports or pause firewalls during rollout; test playbooks against one node before a cluster-wide run; use inventory groups and tags to limit blast radius. For large clusters or full HDFS lifecycle features, vendor managers add value. For quick debugging or simultaneous interactive commands, tmux is a perfectly fine short-term tool.

Recommended Answers

All 5 Replies

Member Avatar for rubberman

Download the free version of the Cloudera Hadoop management tool. It will nicely do all that cruft for you.

Member Avatar for Pavan_6

Rubberman, if it can work on Cloudera, then there is some software in apache that should do the same work? do you know what it is called in cloudera?

Edited by pritaeas because: Removed markdown.
Member Avatar for L7Sqr

If you need a quick-and-dirty approach to controlling several machines in parallel (provided the number of machines is fairly small) you can use tmux. With a separate pane hosting an ssh session to a unique host you can enable synchronize-panes in tmux to have commands echoed to each host at the same time.

Search for tmux synchronize-panes for more details.

Member Avatar for Gribouillis

I read about a python module named yesterday. I think it can distribute commands the way you want.

Member Avatar for Pavan_6

TMUX worked!

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.