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ec2: fix broken nixops check with NVMe #1075



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commented Jan 8, 2019

I've noticed that nixops check is failing to recognize NVMe devices and shows them as un-attached all the time, then tries to re-attach them with each nixops deploy, here's an example:
nix-shell:~/src/nixops-unstable]$ nixops check -d XXXXX Machines state: +----------+--------+-----+-----------+----------+----------------+-------+---------------------------------------------------------------+ | Name | Exists | Up | Reachable | Disks OK | Load avg. | Units | Notes | +----------+--------+-----+-----------+----------+----------------+-------+---------------------------------------------------------------+ | data0 | Yes | Yes | Yes | No | 1.65 1.80 1.32 | | volume ‘vol-0e386094f39e6d82a’ not attached to ‘/dev/nvme1n1’ | | frontend | Yes | Yes | Yes | No | 0.12 0.18 0.17 | | volume ‘vol-0b2aa0f4d7be9434b’ not attached to ‘/dev/nvme1n1’ | +----------+--------+-----+-----------+----------+----------------+-------+---------------------------------------------------------------+ Non machines resources state: +---------+--------+ | Name | Exists | +---------+--------+ | keypair | Yes | | sg | Yes | | role | Yes | +---------+--------+
[nix-shell:~/src/nixops-unstable]$ nixops deploy -d XXXXX frontend> warning: device ‘/dev/nvme1n1’ was manually detached! data0...> warning: device ‘/dev/nvme1n1’ was manually detached! frontend> attaching volume ‘vol-0b2aa0f4d7be9434b’ as ‘/dev/nvme1n1’... data0...> attaching volume ‘vol-0e386094f39e6d82a’ as ‘/dev/nvme1n1’... building all machine configurations... ^Cerror: interrupted error: interrupted by the user ^[[A [nix-shell:~/src/nixops-unstable]$

Using the device_name_to_boto_expected() function, it seems working for both 5th generation (NVMe) and older generation disks as it translates both device names 'xvdX' and 'nvmeXnX' to 'sdX'.

@amemni amemni force-pushed the amemni:use_boto-expected-devices_nixops-check branch from 971c066 to 2a4d4ff Jan 8, 2019
@amemni amemni changed the title Use device_that_boto_expects in nixops check to avoid NVMes showing as un-attached ec2: fix broken nixops check with NVMe Jan 8, 2019

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commented Jan 9, 2019

@AmineChikhaoui AmineChikhaoui merged commit 555d25e into NixOS:master Jan 9, 2019
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@amemni amemni deleted the amemni:use_boto-expected-devices_nixops-check branch Jan 24, 2019
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