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Idea #21880

Updated by Peter Amstutz 5 months ago

The current stack of installer.sh + provision.sh + salt + stacks/pillars/formulas increasingly feels over complicated and brittle, in part due to concerns the the salt ecosystem doesn't really seem to be keeping up. 

 To start the discussion, here's a sketch: 

 * Run Terraform and capture the output state such that it can be used directly as input to Ansible 
 ** Ideally the description of resources is somewhat independent of infrastructure and could be written by hand for fixed on-premises resources as well 
 ** We want to tag resources with roles at this point 
 ** Perhaps other cluster configuration could be declared as constants that pass from input to output, so we get one output state that has everything required to deploy the cluster? 
 * Run Ansible on the output state produced by Terraform 
 ** Goes through each role and configures the machines that have that role by writing config files and installing packages 
 * When installation is done, also runs diagnostics automatically 

 FWIW, it seems integration can go various ways 

 * Terraform runs Ansible - https://github.com/ansible/terraform-provider-ansible 
 * Ansible runs Terraform  
 * Manually run Terraform and then Ansible 
 * Orchestrate them from a 3rd tool or script 

 (my feeling about the last two is "ugh" but included for completeness)

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