How can k8s containers access internal domain names?

2 years ago
Noah Thompson
1 minute

One option is to configure kube-dns or CoreDNS to resolve and access internal domain names for Kubernetes (k8s) containers. Here are some steps:

  1. Configuration file
  2. Configuration Map
  3. Configuration Map
apiVersion: v1
kind: ConfigMap
metadata:
  name: custom-dns
data:
  internal-domain.com: "192.168.1.100"
  1. Pod (group of whales or dolphins)
  2. Pea fruit
  3. a map of configurations
  4. Kubernetes Domain Name System
  5. CoreDNS is a cloud-native DNS server.
  6. Seedpod
  7. specifications
  8. domain name system configuration
  9. A configuration map
apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  dnsConfig:
    nameservers:
      - 10.0.0.10  # kube-dns or CoreDNS IP 地址
    searches:
      - custom-dns.namespace.svc.cluster.local  # 自定义 ConfigMap 名称和命名空间

In this example, 10.0.0.10 is the IP address for kube-dns or CoreDNS, and custom-dns.namespace.svc.cluster.local is the name and namespace of the custom ConfigMap you created.

  1. The website internal-domain.com
  2. One hundred ninety-two dot one sixty-eight dot one dot one hundred

Please note that the specific steps may vary depending on your environment and configuration. However, the above steps provide a basic guide that you can adjust according to your needs.

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