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kislyuk / aegea

Amazon Web Services Operator Interface
Apache License 2.0
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NVMe volume mounts do not persist upon reboot #76

Open kislyuk opened 10 months ago

kislyuk commented 10 months ago

This happens because systemd interferes with mount -a and unmounts the mountpoint specifies in /etc/fstab:

systemd[1]: dev-xvdz.device: Job dev-xvdz.device/start timed out.
systemd[1]: Timed out waiting for device /dev/xvdz.

The device name /dev/xvdz is a symlink that we create in cloudinit code to the actual device node. This apparently breaks systemd logic and it starts to unmount the device immediately even when we mount it manually after this.

Address this by disabling this systemd mount "helper" behavior.

kislyuk commented 10 months ago

See https://github.com/systemd/systemd/issues/1741

kislyuk commented 10 months ago

See https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-mapping-concepts.html