The missing checklist

2019-01-07 - Progress - Tony Finch

Before I rename/upgrade any more servers, this is the checklist I should have written last month...

For rename

• Ensure both new and old names are in the DNS

• Rename the host in ipreg/ansible/bin/make-inventory and run the script

• Run ipreg/ansible/bin/ssh-knowhosts to update ~/.ssh/known_hosts

• Rename host_vars/$SERVER and adjust the contents to match a previously renamed server (mutatis mutandis)

• For recursive servers, rename the host in ipreg/ansible/roles/keepalived/files/vrrp-script and ipreg/ansible/inventory/dynamic

For both

• Ask infra-sas@uis to do the root privilege parts of the netboot configuration - rename and/or new OS version as required

For upgrade

• For DHCP servers, save a copy of the leases file by running:

  ansible-playbook dhcpd-shutdown-save-leases.yml \
      --limit $SERVER
  

• Run the preseed.yml playbook to update the unprivileged parts of the netboot config

• Reboot the server, tell it to netboot and do a preseed install

• Wait for that to complete

• For DHCP servers, copy the saved leases file to the server.

• Then run:

  ANSIBLE_SSH_ARGS=-4 ANSIBLE_HOST_KEY_CHECKING=False \
      ansible-playbook -e all=1 --limit $SERVER main.yml
  

For rename

• Update the rest of the cluster's view of the name

  git push
  ansible-playbook --limit new main.yml