Need advise on define inventory-specific variables

[Chengbing Liu]

I'm using Ansible to deploy and maintain Hadoop clusters.

I used to define variables in group_vars/all as shown below:

hadoop:

# Variables for core-site.xml
  nameservice: hadoop-namenode

# Variables for hdfs-site.xml
  dfs_blocksize: 256m

# Variables for mapred-site.xml
  mapred_job_tracker: hadoop-jobtracker:8021

However, I have different inventory files, which makes it prone to mistakes.

I can define variables using [all:vars] in inventory files:

[all:vars]
hadoop_nameservice=hadoop-namenode

 

How can I define inventory-specific variables, while still preserving the structured definition as in group_vars/all?

Thanks a lot!

[Michael DeHaan]

Perhaps I'm not understanding the question, but:

group_vars/all

group_vars/groupname1

group_vars/groupname2

etc

This can be used with multiple inventory files if group_vars is a directory in the directory with both of them, which should be what you need.

Let us know if this doesn't make sense and perhaps I can elaborate further.

Thanks!

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[Chengbing Liu]

Sorry, the question was not stated clearly.

I have different inventory files corresponding to different clusters, e.g.:

hosts_cluster1

[NameNode] 

host1

hosts_cluster2

[NameNode] 

host2

 They have the same group names, therefore I decide to move the variable definitions from group_vars to the all:vars section of inventory file.
However, I cannot define structured variables like before in group_vars.

Any advice?

在 2014年7月8日星期二UTC+8上午3时29分14秒，Michael DeHaan写道：

在 2014年7月8日星期二UTC+8上午3时29分14秒，Michael DeHaan写道：

在 2014年7月8日星期二UTC+8上午3时29分14秒，Michael DeHaan写道：

[Michael DeHaan]

"They have the same group names, therefore I decide to move the variable definitions from group_vars to the all:vars section of inventory file.
However, I cannot define structured variables like before in group_vars."

I would consider different group names for each, and a parent group that contains them called NameNode or similar.

This way they could be selected by the same group but have different values for variables.

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/3290759e-95bd-44e9-b03b-a6609722b46c%40googlegroups.com.