环境
- kubernetes 1.20.4
- Spring Boot 2.5.0-M3
目标
hostAliases 可以在 /etc/host 文件中设置别名。
示例
Pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: spring-k8s
spec:
containers:
- name: spring-k8s
image: jiangbo920827/spring-k8s:liveness
ports:
- containerPort: 8080
hostAliases:
- hostnames:
- node2
ip: 192.168.56.103
查看 host
[root@master ~]# kubectl exec -it spring-k8s -- sh
/ # ls
BOOT-INF bin etc lib mnt org root sbin sys usr
META-INF dev home media opt proc run srv tmp var
/ # cat /etc/hosts
# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
10.244.2.169 spring-k8s
# Entries added by HostAliases.
192.168.56.103 node2
/ # ping node2
PING node2 (192.168.56.103): 56 data bytes
64 bytes from 192.168.56.103: seq=0 ttl=64 time=0.084 ms
64 bytes from 192.168.56.103: seq=1 ttl=64 time=0.071 ms
64 bytes from 192.168.56.103: seq=2 ttl=64 time=0.090 ms
^C
--- node2 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.071/0.081/0.090 ms
/ #
总结
hostAliases 可以在 /etc/host 文件中设置别名，并且可以通过别名访问对应的 IP。