Verify VM SSH fingerprints as part of pool creation

alan-turing-institute / azure-batch-tools

Some tools to make deploying batch processing jobs to Azure easier

MIT License

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Verify VM SSH fingerprints as part of pool creation #10

Closed martintoreilly closed 7 years ago

martintoreilly commented 7 years ago

Currently the first SSH connection with each VM is during setup-pool. This requires user interaction to verify the VM fingerprint before executing a long running script. This spaces out the required user interaction unpredictably and means that setup-pool cannot run completely hands off.

martintoreilly commented 7 years ago

Done in commit ab2f83e, which improves handling of SSH by:

Keys stored in VM pool sshkeys container on pool creation
All calls to SSH have strict checking off (-o StrictHostKeyChecking=no)
Add ‘get-ssh’ command to get SSH keys. This:
Fetches SSH keys from VM pool azure storage
Removes previous hostnames for VMs (avoiding “changed key” warnings)
Tests SSH connection to each VM (to ensure any user prompts are handled efficiently)