fix: mount root path in /hostfs for hostmetrics (#5534)

Signed-off-by: Prashant Shahi <prashant@signoz.io>

pkg/query-service/tests/test-deploy/docker-compose.yaml

@@ -219,6 +219,7 @@ services:
       - ./otel-collector-config.yaml:/etc/otel-collector-config.yaml
       - ./otel-collector-opamp-config.yaml:/etc/manager-config.yaml
       - /var/lib/docker/containers:/var/lib/docker/containers:ro
+      - /:/hostfs:ro
     environment:
       - OTEL_RESOURCE_ATTRIBUTES=host.name=signoz-host,os.type=linux
       - DOCKER_MULTI_NODE_CLUSTER=false

pkg/query-service/tests/test-deploy/otel-collector-config.yaml

@@ -40,6 +40,7 @@ receivers:
       #   endpoint: 0.0.0.0:6832
   hostmetrics:
     collection_interval: 30s
+    root_path: /hostfs
     scrapers:
       cpu: {}
       load: {}