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CentOS 7.7 SELinux Enforcing Minimal HVM

Technology Leadership Corporation | CentOS 7.7 SELinux Enforcing Minimal

Linux/Unix, CentOS 7.7 - 64-bit Amazon Machine Image (AMI)

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    Don

Reasonable, but block-device-mapping not working as expected

  • November 19, 2019
  • Review verified by AWS Marketplace

Trying to launch via vagrant-aws using

aws.block_device_mapping = [ {'DeviceName' => '/dev/sda1',
'Ebs.VolumeSize' => CONF['ebs_volume_size'] } ]

which has worked in all other AMIs I've used. It allocates an EBS resource for /dev/sda1 but doesn't attach root filesystem to it:

$ df
Filesystem              1K-blocks    Used Available Use% Mounted on
.
.
.
/dev/mapper/centos-root   6486016 3043876   3442140  47% /
/dev/xvda1                1038336  202284    836052  20% /boot
.
.
.

It appears that the problem is that / is mapped to /dev/mapper/centos-root, which
maps to /dev/dm-0, but this is not considered a valid device name for mapping:

InvalidBlockDeviceMapping => Invalid device name /dev/dm-0



On the official AWS CentOS 7.6 AMI it's mounted as expected:

$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/xvda1 15717356 1403480 14313876 9% /



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