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testing: Use host's /dev/urandom as /dev/random on guests via VirtIO RNG 

Newer versions of systemd etc. seem to require quite a lot of entropy
from /dev/random while booting, which can block and therefore delay the
start of other services (in particular sshd) by more than a minute.
Using the host's /dev/urandom via VirtIO RNG, we can avoid blocking the
guests.

The required kernel options are added for kernel versions 5.4+.
This commit is contained in:
Tobias Brunner 2020-08-24 15:33:44 +02:00
parent 766017a8d3
commit 5747ec4eae
10 changed files with 39 additions and 3 deletions
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7
testing/config/kernel/config-5.4
View File

@ -1660,7 +1660,12 @@ CONFIG_DEVKMEM=y
CONFIG_HVC_DRIVER=y
CONFIG_VIRTIO_CONSOLE=y
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
# CONFIG_HW_RANDOM_VIA is not set
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_NVRAM is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set

7
testing/config/kernel/config-5.5
View File

@ -1627,7 +1627,12 @@ CONFIG_DEVKMEM=y
CONFIG_HVC_DRIVER=y
CONFIG_VIRTIO_CONSOLE=y
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
# CONFIG_HW_RANDOM_VIA is not set
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_NVRAM is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set

7
testing/config/kernel/config-5.7
View File

@ -1641,7 +1641,12 @@ CONFIG_HVC_DRIVER=y
# CONFIG_SERIAL_DEV_BUS is not set
CONFIG_VIRTIO_CONSOLE=y
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
# CONFIG_HW_RANDOM_VIA is not set
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set
CONFIG_DEVMEM=y

3
testing/config/kvm/alice.xml
View File

@ -68,5 +68,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/bob.xml
View File

@ -61,5 +61,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/carol.xml
View File

@ -61,5 +61,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/dave.xml
View File

@ -61,5 +61,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/moon.xml
View File

@ -73,5 +73,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/sun.xml
View File

@ -73,5 +73,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>

3
testing/config/kvm/winnetou.xml
View File

@ -66,5 +66,8 @@
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
</rng>
</devices>
</domain>