OCPBUGS-13153: Limit the value of GOMAXPROCS on node-exporter.

xxxxx

Signed-off-by: Ayoub Mrini <amrini@redhat.com>

assets/node-exporter/daemonset.yaml

@@ -41,6 +41,18 @@ spec:
         - --collector.cpu.info
         - --collector.textfile.directory=/var/node_exporter/textfile
         - --no-collector.btrfs
+        command:
+          - /bin/sh
+          - -c
+          - |
+            export GOMAXPROCS=4
+            # We don't take CPU affinity into account as the container dones't have integer CPU requests
+            NUM_CPUS=$(grep -c '^processor' "/proc/cpuinfo" 2>/dev/null || echo "0")
+            if [ "$NUM_CPUS" -lt "$GOMAXPROCS" ]; then
+              export GOMAXPROCS="$NUM_CPUS"
+            fi
+            echo "Set GOMAXPROCS=$GOMAXPROCS"
+            exec /bin/node_exporter "$0" "$@"
         image: quay.io/prometheus/node-exporter:v1.5.0
         name: node-exporter
         resources: