Kola test for numad

Add a test that checks that numad can startup and track processes
without any issues.

Author: angelcerveraroldan

tests/kola/numad/config.bu

@@ -0,0 +1,6 @@
+variant: fcos
+version: 1.6.0
+systemd:
+  units:
+    - name: numad.service
+      enabled: true

tests/kola/numad/data/commonlib.sh

@@ -0,0 +1 @@
+../../data/commonlib.sh

tests/kola/numad/test.sh

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+#!/bin/bash
+## kola:
+##   # we install stress-ng
+##   tags: needs-internet
+##   platforms: qemu
+##   numaNodes: true
+##   minMemory: 2048
+##   architectures: "!s390x"
+##   description: Verify that numad detects nodes and tracks set -euo pipefail
+##   bindMountHostRO: ["/,/var/cosaroot"]
+
+set -euo pipefail
+
+# shellcheck disable=SC1091
+. "$KOLA_EXT_DATA/commonlib.sh"
+
+if [[ $(systemctl show numad -p ActiveState) != "ActiveState=active" ]]; then
+    fatal "numad did not activate"
+fi
+
+# Call numad to change the already running daemon's settings for -l and -i
+# `-l 7` adds extra information to the logs
+# `-i 5` changes interval from every 15s to every 5s
+numad -l7 -i5
+
+if ! lscpu | grep -Eq "NUMA node\(s\):\s*2"; then
+    fatal "expected to find exactly 2 numa nodes"
+fi
+
+# As part of the test we want to run a somewhat intensive process, so that
+# we can verify that numad is successfully tracking processes. Here we
+# use the same pattern of using a mounted in COSA as the container root as:
+# https://github.com/coreos/coreos-assembler/blob/8dbfe3ea8b8f571e732e8cc0ab307e983a0be1f3/mantle/cmd/kola/resources/iscsi_butane_setup.yaml#L102-L113
+podman run --privileged --name stress-ng --pid=host                      \
+    --volume=root:/root/:nocopy --volume=vartmp:/var/tmp/:nocopy         \
+    --workdir /root --rootfs /var/cosaroot                               \
+    stress-ng --temp-path /var/tmp --vm 1 --vm-bytes 1024M --timeout 25s
+
+logfile="/var/log/numad.log"
+for node in 0 1; do
+	# Different versions of numad have a slightly different format for the log file,
+	# e.g. MBs_total vs MBs_tot. This pattern should match both versions.
+	if ! grep -Eq "Node.${node}.*MBs_tot(al)?.*CPUs_tot(al)?" "$logfile"; then
+		fatal "Numad didn't detect Node ${node}"
+	fi
+done
+
+# Check that the stress test was being monitored by numad
+if ! grep -q "stress-ng-vm" "$logfile"; then
+    fatal "Numad is not monitoring the stress test"
+fi
+
+ok "Numad working as expected"