Deploying a 3 nodes cluster with ansible

Hi !

I would like to deploy a 3 nodes cluster with ansible. (I'm new in the ansible world)
I would like to know if the playbook I made will answer all my requests.

My requests are:

  • deploy elasticsearch and logstash to 3 servers.
  • whenever a server break, I just need to launch the playbook so a new elasticsearch and logstash instance are installed in the new server and are added to the current cluster. (i don't backup the servers, so I need to reinstall when one break)

The roles I use are the official elacticsearch roles and for logstash:

Here is my playbook:

Thank you !

You should test whether it works. I can offer a few comments: "liprd072:9300,liprd073,9300",

The last comma should of course be a colon.

You shouldn't have three nearly identical plays in the playbook. Use a single play that acts on all hosts. If they need different variables then use group_vars and/or host_vars to use different values for each host.

I'm pretty sure that can always list all hostnames, i.e. you don't have to be picky about not listing a node's own hostname.

You're listing twice for each es_config role.

Thank you for your reply.

I've updated my play:

And in the inventory I put a host var. hosts_unicast=liprd071:9300,liprd71:9300 (each var are different for each host)

Am I doing it right ?

Yeah, you're on the right track.

Note that the groups dictionary contains a mapping of all inventory groups and their members, so instead of defining a separate variable that lists the hostnames and referencing it when you set the unicast host list you can say groups['nodes'].

But this is more about Ansible than Elasticsearch so I'll stop here.

Okay thank you for your reply.

I launched the playbook and everything have been installed but I have now 2 problems:

  1. There is no elasticsearch service. Elastic search is launched with and not as a service
  2. My nodes are alone, the unicast discover doesn't work. I have 3 nodes but there not in the same cluster. How do I make it works ?

Thank you !

  1. I don't understand the question. There appears to be a word missing.
  2. What's in the ES logs? Is ES listening to the right interfaces? As of 2.0 it's only listening on localhost by default.
  1. Oups sorry, the word was Java.

  2. I put eth0

    [2016-10-20 10:34:10,837][INFO ][node ] [LIPRD071-node1] version[2.4.1], pid[25300], build[c67dc32/2016-09-27T18:57:55Z]
    [2016-10-20 10:34:10,838][INFO ][node ] [LIPRD071-node1] initializing ...
    [2016-10-20 10:34:11,869][INFO ][plugins ] [LIPRD071-node1] modules [lang-groovy, reindex, lang-expression], plugins [], sites []
    [2016-10-20 10:34:11,908][INFO ][env ] [LIPRD071-node1] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [484.6gb], net total_space [506.8gb], spins? [unknown], types [rootfs]
    [2016-10-20 10:34:11,909][INFO ][env ] [LIPRD071-node1] heap size [2.9gb], compressed ordinary object pointers [true]
    [2016-10-20 10:34:15,052][INFO ][node ] [LIPRD071-node1] initialized
    [2016-10-20 10:34:15,052][INFO ][node ] [LIPRD071-node1] starting ...
    [2016-10-20 10:34:15,304][INFO ][transport ] [LIPRD071-node1] publish_address {}, bound_addresses {[::1]:9300}, {}
    [2016-10-20 10:34:15,311][INFO ][discovery ] [LIPRD071-node1] ES-cluster/olHth8g4RJG6zvhFMdpCpg
    [2016-10-20 10:34:18,354][INFO ][cluster.service ] [LIPRD071-node1] new_master {LIPRD071-node1}{olHth8g4RJG6zvhFMdpCpg}{}{}{master=true}, reason: zen-disco-join(elected_as_master, [0] joins received)
    [2016-10-20 10:34:18,379][INFO ][http ] [LIPRD071-node1] publish_address {}, bound_addresses {[::1]:9200}, {}
    [2016-10-20 10:34:18,380][INFO ][node ] [LIPRD071-node1] started
    [2016-10-20 10:34:18,427][INFO ][gateway ] [LIPRD071-node1] recovered [0] indices into cluster_state

If read well, I should put a publish_adress wich is the ip adress of the server ?

  1. Okay. It sounds weird that the playbook doesn't start ES via service elasticsearch start but I don't have time to dig into this.
  2. Your logs indicate that you're only binding to localhost.
  1. In fact the service elasticsearch doesn't exists but a script called node1-elasticsearch exists in /etc/default. (or node2-elasticsearch, etc.)
  2. Okay I'll set this up and I'll come back. Thank you

EDIT: I don't know how to bind to another adress. I put site and it still bind to localhost. Do i have do specify the IP adress ?

EDIT2: The log are not up to date, I don't know why. And I can't apt-get remove elasticsearch... Something doesn't work well..

EDIT3: All my servers are down, I have to rebuild them.