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Updating the Stack

You can change various settings of your hub's stack by performing a stack Update. You will not experience any downtime when making these changes. To Update your stack:

  • Select the stack in the CloudFormation console
  • Go to Stack Actions -> Update Stack
  • Choose "Use current template"
  • Review the parameter selections and choose 'Update'

Some of the things you can do via a stack update:

  • Change the number and type of servers
  • Switch your hub into Offline Mode to save costs (and redirect to a URL)
  • Add or change a monthly database budget or adjust storage limits
  • Add or remove an Application Load Balancer
  • Disable or enable database auto-pausing
  • Change the database max ACU capacity
  • Change the SSH keypair used by your servers

Some things you should not update or change after the stack is created, and should leave as-is:

  • Your domains or mail settings
  • Everything under Restore from Backup section (to restore from a backup, see Backup and Restore)
  • Everything under Advanced

✨📝 Upgrade your Hubs Cloud template to the latest​

Infrequently, we'll need to update the Hubs Cloud template which follows this manual update workflow.

Updating the template changes the underlying aws infrastructure or services such as: machine images, lambdas, autoscaling groups, or machine startup scripts.

💾 Before following the steps below, make sure you've backed up your stack just in case: 💾 Backup and Restore

  1. 🔎 Determine whether your stack is Hubs Cloud Personal, Enterprise single server, or Enterprise multi-server
    1. Cloudformation > Stacks > Select your stack > Parameters tab
    2. Does your stack have # of App Servers or # of Streaming Servers listed?
      1. If yes, you have Enterprise multi-server
      2. If no, you have Personal or Enterprise single server
  2. 💤 Update your stack to Offline Mode see ⬆️ Updating the stack
  3. ⌛ Wait for the Offline Mode update to complete
  4. 📎 Next, get the latest Template URL from the AWS Marketplace flow (DO NOT CREATE A NEW STACK)
    1. Open new tab and go to hubs.mozilla.com/cloud
    2. Select Personal or Enterprise (depending on step 1) then go through the AWS Marketplace flow, but do not create the stack
    3. Continue to subscribe --> Continue to config --> Continue to Launch --> Choose Action Launch Cloud Formation --> Launch
    4. Go to "Create stack" page: Step 1 Specify template page
    5. Copy "Amazon S3 URL" from Specify template section
  5. 📝 Replace the current template of your live stack
    1. Cloudformation > Stacks > Select your stack
    2. Click Update
    3. Select "Replace current template"
    4. Paste previously copied "Amazon S3 URL" from step 4 in Amazon S3 URL section
    5. Click Next
    6. ✅ Do all filled in values look correct? If they do NOT look correct, then you may have copied the wrong Personal/Enterprise template! Go back to replace template step. Then copy and paste the correct template from step 4 again.
  6. ⌛ Finish the stack update with the new template stay in Offline Mode
  7. 🌅 After the update is complete, ⬆️ update the stack to Online Mode (out of Offline Mode)
  8. 🎉 Finished! Congrats! 🎉