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runtime: Add option "enable_guest_swap" to config hypervisor.qemu

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This commit add option "enable_guest_swap" to config hypervisor.qemu.
It will enable swap in the guest. Default false.
When enable_guest_swap is enabled, insert a raw file to the guest as the
swap device if the swappiness of a container (set by annotation
"io.katacontainers.container.resource.swappiness") is bigger than 0.
The size of the swap device should be
swap_in_bytes (set by annotation
"io.katacontainers.container.resource.swap_in_bytes") - memory_limit_in_bytes.
If swap_in_bytes is not set, the size should be memory_limit_in_bytes.
If swap_in_bytes and memory_limit_in_bytes is not set, the size should be
default_memory.

Fixes: #2201

Signed-off-by: Hui Zhu <teawater@antfin.com>
This commit is contained in:
Hui Zhu
2021-07-08 18:10:39 +08:00
parent a733f537e5
commit cb6b7667cd
8 changed files with 113 additions and 10 deletions
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11
src/runtime/cli/config/configuration-qemu.toml.in
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@@ -356,6 +356,17 @@ valid_entropy_sources = @DEFVALIDENTROPYSOURCES@
# See: https://www.qemu.org/docs/master/qemu-qmp-ref.html#Dump-guest-memory for details
#guest_memory_dump_paging=false
# Enable swap in the guest. Default false.
# When enable_guest_swap is enabled, insert a raw file to the guest as the swap device
# if the swappiness of a container (set by annotation "io.katacontainers.container.resource.swappiness")
# is bigger than 0.
# The size of the swap device should be
# swap_in_bytes (set by annotation "io.katacontainers.container.resource.swap_in_bytes") - memory_limit_in_bytes.
# If swap_in_bytes is not set, the size should be memory_limit_in_bytes.
# If swap_in_bytes and memory_limit_in_bytes is not set, the size should
# be default_memory.
#enable_guest_swap = true
[factory]
# VM templating support. Once enabled, new VMs are created from template
# using vm cloning. They will share the same initial kernel, initramfs and