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nixos/tests/incus: improve test resiliency under load

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Adam Stephens 2023-11-02 22:09:37 -04:00
parent 3132ba6cda
commit f12af77bd8
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1 changed files with 13 additions and 12 deletions
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25
nixos/tests/incus/container.nix
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@ -29,8 +29,14 @@ in
testScript = ''
def instance_is_up(_) -> bool:
status, _ = machine.execute("incus exec container --disable-stdin --force-interactive /run/current-system/sw/bin/true")
return status == 0
status, _ = machine.execute("incus exec container --disable-stdin --force-interactive /run/current-system/sw/bin/true")
return status == 0
def set_container(config):
machine.succeed(f"incus config set container {config}")
machine.succeed("incus restart container")
with machine.nested("Waiting for instance to start and be usable"):
retry(instance_is_up)
machine.wait_for_unit("incus.service")
@ -49,28 +55,23 @@ in
machine.succeed("echo true | incus exec container /run/current-system/sw/bin/bash -")
with subtest("Container CPU limits can be managed"):
machine.succeed("incus config set container limits.cpu 1")
# give container a chance to apply new resource limit
machine.sleep(1)
set_container("limits.cpu 1")
cpuinfo = machine.succeed("incus exec container grep -- -c ^processor /proc/cpuinfo").strip()
assert cpuinfo == "1", f"Wrong number of CPUs reported from /proc/cpuinfo, want: 1, got: {cpuinfo}"
machine.succeed("incus config set container limits.cpu 2")
machine.sleep(1)
set_container("limits.cpu 2")
cpuinfo = machine.succeed("incus exec container grep -- -c ^processor /proc/cpuinfo").strip()
assert cpuinfo == "2", f"Wrong number of CPUs reported from /proc/cpuinfo, want: 2, got: {cpuinfo}"
with subtest("Container memory limits can be managed"):
machine.succeed("incus config set container limits.memory 64MB")
machine.sleep(1)
set_container("limits.memory 64MB")
meminfo = machine.succeed("incus exec container grep -- MemTotal /proc/meminfo").strip()
meminfo_bytes = " ".join(meminfo.split(' ')[-2:])
assert meminfo_bytes == "62500 kB", f"Wrong amount of memory reported from /proc/meminfo, want: '62500 kB', got: '{meminfo_bytes}'"
machine.succeed("incus config set container limits.memory 128MB")
machine.sleep(1)
set_container("limits.memory 128MB")
meminfo = machine.succeed("incus exec container grep -- MemTotal /proc/meminfo").strip()
meminfo_bytes = " ".join(meminfo.split(' ')[-2:])
assert meminfo_bytes == "125000 kB", f"Wrong amount of memory reported from /proc/meminfo, want: '62500 kB', got: '{meminfo_bytes}'"
assert meminfo_bytes == "125000 kB", f"Wrong amount of memory reported from /proc/meminfo, want: '125000 kB', got: '{meminfo_bytes}'"
'';
})