原因：
测试环境docker起的容器ceate连接不上数据库，CentOS7的系统。
- 执行docker info查看信息
Client:
Context: default
Debug Mode: false
Plugins:
app: Docker App (Docker Inc., v0.9.1-beta3)
buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
Server:
Containers: 2
Running: 1
Paused: 0
Stopped: 1
Images: 3
Server Version: 20.10.5
Storage Driver: overlay2
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 1
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e
runc version: 12644e614e25b05da6fd08a38ffa0cfe1903fdec
init version: de40ad0
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-1160.21.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 3.7GiB
Name: docker-seata.xd.local
ID: FQRG:XBJ5:K5CW:A7KU:KQQJ:OEWC:HHAO:FCLN:DFVU:Q42Q:VNJ7:32GT
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
nexus:8082
nexus:8084
127.0.0.0/8
Registry Mirrors:
http://nexus:8084/
Live Restore Enabled: false
WARNING: IPv4 forwarding is disabled
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
- 可以看到最后三行warning，解决方法：
vim /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-arptables=1
net.ipv4.ip_forward=1
- 重启网络
systemctl restart network
- docker info 查看无异常
-
进入容器测试网络是否可以出去
image.png
解决
