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Baohua Yang
2026-02-21 10:47:37 -08:00
parent 47cfc173a6
commit 5ae315c9dd
48 changed files with 667 additions and 727 deletions
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08_data_network/network/README.md
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@@ -47,10 +47,22 @@ graph TD
### 数据流向
```
容器 A (172.17.0.2) → docker0 → 容器 B (172.17.0.3) (容器间通信)
容器 A (172.17.0.2) → docker0 → eth0 → 互联网 (访问外网)
外部请求 → eth0 → docker0 → 容器 A (被外部访问，需端口映射)
```mermaid
flowchart LR
subgraph Comm1 ["容器间通信"]
direction LR
C1A["容器 A (172.17.0.2)"] --> D0A["docker0"] --> C1B["容器 B (172.17.0.3)"]
end
subgraph Comm2 ["访问外网"]
direction LR
C2A["容器 A (172.17.0.2)"] --> D0B["docker0"] --> Eth0A["eth0"] --> InternetA["互联网"]
end
subgraph Comm3 ["被外部访问，需端口映射"]
direction LR
Req["外部请求"] --> Eth0B["eth0"] --> D0C["docker0"] --> C3A["容器 A"]
end
```
---
@@ -124,17 +136,12 @@ PING db (172.18.0.3): 56 data bytes
自定义网络自动提供 DNS 服务：
```
┌─────────────────────────────────────────────────────────┐
│ mynet 网络 │
│ │
│ ┌─────────┐ DNS ┌─────────┐ │
│ │ web │ ──── "db" → 172.18.0.3 ───► │ db │ │
│ │172.18.0.2│ │172.18.0.3│ │
│ └─────────┘ └─────────┘ │
│ │
│ web 容器可以用 "db" 作为主机名访问 db 容器 │
└─────────────────────────────────────────────────────────┘
```mermaid
flowchart LR
subgraph MyNet ["mynet 网络 : web 容器可以用 'db' 作为主机名访问 db 容器"]
direction LR
Web["web<br/>172.18.0.2"] -- "DNS: 'db' → 172.18.0.3" --> DB["db<br/>172.18.0.3"]
end
```
---
@@ -231,17 +238,10 @@ $ docker port mycontainer
### 端口映射示意图
```
外部请求 http://宿主机IP:8080
│
▼
┌─────────────┐
│ 宿主机:8080 │ ─── iptables NAT ───┐
└─────────────┘ │
▼
┌───────────────┐
│ 容器 nginx:80 │
└───────────────┘
```mermaid
flowchart TD
Req["外部请求 http://宿主机IP:8080"] --> Host["宿主机:8080"]
Host -- "iptables NAT" --> Container["容器 nginx:80"]
```
---