podman 容器内访问 host 主机的端口 - 知识库 - BSMI KB 基础标准矿产工业

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podman 支持跟 docker 一样，设置一个 hosts 配置，让你可以访问到主机的端口

秘密就在于启动容器的时候，加上这个

--network slirp4netns:allow_host_loopback=true

然后就可以访问了

```
curl localhost
hello
nomore@localhost:~> podman run --network slirp4netns:allow_host_loopback=true -it alpine /bin/sh  -c " grep containers /etc/hosts"
10.0.2.2 host.containers.internal
nomore@localhost:~> podman run --network slirp4netns:allow_host_loopback=true -it alpine /bin/sh  -c " curl host.containers.internal""
> 
> 
> "
/bin/sh: curl: not found
nomore@localhost:~> podman run --network slirp4netns:allow_host_loopback=true -it alpine /bin/sh  -c "apk add curl &&  curl host.containers.internal"
fetch https://dl-cdn.alpinelinux.org/alpine/v3.15/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz
(1/5) Installing ca-certificates (20211220-r0)
(2/5) Installing brotli-libs (1.0.9-r5)
(3/5) Installing nghttp2-libs (1.46.0-r0)
(4/5) Installing libcurl (7.80.0-r0)
(5/5) Installing curl (7.80.0-r0)
Executing busybox-1.34.1-r3.trigger
Executing ca-certificates-20211220-r0.trigger
OK: 8 MiB in 19 packages
hello
```

在 podman-compose 里面，我们可以这样写

```
version: "3.4"
services:
 casdoor:
 restart: always
 image: casbin/casdoor
 network_mode: "slirp4netns:allow_host_loopback=true"
 ports:
 - "127.0.0.1:8087:8000"
 environment:
 RUNNING_IN_DOCKER: "true"
 volumes:
 - ./conf:/conf/
 networks:
 - internal
 restart: unless-stopped
networks:
 internal:
 attachable: true
```

您也可以修改全局配置项

```
# vim /usr/share/containers/containers.conf

修改这一行，加上 allow_host_loopback=true 就可以了
network_cmd_options = ["allow_host_loopback=true"]
```