FQDN

Jan 1, 0001

Definition

A Fully Qualified Domain Name (FQDN) is the complete domain name for a specific computer or host on the internet. It includes the hostname and the domain name, providing an absolute path to the host in the DNS hierarchy. An FQDN is typically structured as hostname.domain.tld, where tld stands for top-level domain, ensuring that the domain name is unique and can be resolved to an IP address.

Secure Settings Example

# Example of a secure DNS configuration in a Kubernetes cluster
apiVersion: v1
kind: Pod
metadata:
  name: secure-pod
spec:
  containers:
  - name: secure-container
    image: secure-image
  dnsPolicy: "ClusterFirstWithHostNet"
  hostAliases:
  - ip: "192.168.1.10"
    hostnames:
    - "secure.example.com"

Insecure Settings Example

# Example of an insecure DNS configuration in a Kubernetes cluster
apiVersion: v1
kind: Pod
metadata:
  name: insecure-pod
spec:
  containers:
  - name: insecure-container
    image: insecure-image
  dnsPolicy: "None"
  hostAliases:
  - ip: "192.168.1.10"
    hostnames:
    - "insecure"  # Missing FQDN, which can lead to DNS resolution issues