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doc: Update packet.net doc wrt to Intel CPU microcode update

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Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
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Rolf Neugebauer 2018-01-15 18:10:33 +00:00
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@ -34,6 +34,13 @@ an additional YAML for [arm64](../examples/packet.arm64.yml) servers
which provide both access to the serial console and via ssh and
configures bonding for network devices via metadata (if supported).
For x86_64 builds for Intel servers we strongly recommend adding
`ucode: intel-ucode.cpio` to the kernel section in the YAML. This
updates the Intel CPU microcode to the latest by prepending it to the
generated initrd file. The `ucode` entry is only recommended when
booting on baremetal. It should be omitted (but is harmless) when
building images to boot in VMs.
**Note**: The update of the iPXE configuration sometimes may take some
time and the first boot may fail. Hitting return on the console to
retry the boot typically fixes this.