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Reprovisioning nodes

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Reprovisioning nodes can become a bit of a headache with Chef (mostly Chef Vault to be exact), as there are some considerations that need to be made in order to be able to reprovision a node without errors.

Steps to reprovision a node (assuming you are using Terraform)

  1. Deprovision the VM.
  2. Remove the node from Chef using knife: knife node delete -y myhost.tier.env.gitlab.com
  3. Remove the client from Chef using knife: knife client delete -y myhost.tier.env.gitlab.com
  4. Remove all the hostname references from Chef Vault
  5. Check which chef-vaults are assigned to the host in Terraform, normally look for chef_vaults under environments/<env>/main.tf on the corresponding module definition for the role.
  6. Remove the node from the vault with knife vault remove <vault_name> <vault_item> -S "name:myhost.tier.env.gitlab.com"
  7. Example: knife vault remove syslog-client _default -S "name:node01.sv.prd.gitlab.com"
  8. Example: knife vault remove gitlab_consul client -S "name:node01.sv.prd.gitlab.com"
  9. You can spin up the node again using terraform.