Using host network need add dnsPolicy

[l1b0k]

when agent using host network , it need add dnsPolicy . Otherwise it will not resolve service name

E0621 07:41:24.042786       1 agent.go:303] Error while sending info. Details: Post http://netchecker-service:8081/api/v1/agents/netchecker-agent-hostnet-j4bbb: dial tcp: lookup netchecker-service on 10.1.7.77:53: server misbehaving

hostnet DaemonSet should like this

spec:
  template:
    metadata:
      name: netchecker-agent-hostnet
      labels:
        app: netchecker-agent-hostnet
    spec:
      hostNetwork: True
      dnsPolicy: ClusterFirstWithHostNet
      containers:
...

[artem-panchenko]

Confirm this issue, it affects environments where k8s nodes aren't configured to use internal (kubedns) resolver.

[AlexeyKasatkin]

Let's add this into examples or/and docs.