post: docker context

Author: Starslayerx

content/posts/2025-11-14_python-fastapi-logs.TO_DO.md

@@ -364,3 +364,53 @@ asyncio.run(main())
 建议是使用 `get_running_loop`，在没有事件循环的时候会抛出一个报错，从而避免“惊喜”。
 
 ## Using debug mode
+
+asyncio 提供了 debug mode，在这种模式下若协程运行操作 100 毫秒，将会看到几条有用的信息。
+此外，如果不 await coroutine 将会抛出报错，这样就能知道何时正确抛出 await。
+
+### Using asyncio.run
+
+`asyncio.run` 函数有一个 debug 参数，默认是 `False`，可以将其设置为 `True` 来开启调试模式。
+
+```Python
+asyncio.run(coroutine(), debug=True)
+```
+
+调试模式可以通过参数 `-X dev` 实现
+
+```shell
+python3 -X dev program.py
+```
+
+或者通过`python asyncio debug`环境变量实现
+
+```shell
+PYTHONASYNCIODEBUG=1 python3 program.py
+```
+
+在调试模式下，如果一个协程运行时间过程，就会看到提示信息。
+可以使用下面 CPU-bound 代码来测试调试模式
+
+```Python
+import asyncio
+from util import async_timed
+
+@async_timed()
+async def cpu_bound_work() -> int:
+    counter = 0
+    for _ in range(100000000):
+        counter += 1
+    return counter
+
+async def main():
+    task_one = asyncio.create_task(cpu_bound_work())
+    await task_one
+
+asyncio.run(main(), debug=True)
+```
+
+会看到有这样的输出信息
+
+```shell
+Executing <Task finished name='Task-2' coro=<cpu_bound_work() done, defined at /Users/starslayerx/asyncio/util/async_timer.py:8> result=100000000 created at /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/tasks.py:420> took 6.085 seconds
+```

content/posts/2025-11-21_python-asyncio-02-2.md

@@ -0,0 +1,68 @@
++++
+date = '2025-11-25T8:00:00+08:00'
+draft = false
+title = 'Docker Context'
+tags = ['Docker']
++++
+
+Docker Context 是 Docker 2019 年引入的一个特性，用来管理多个 Docker 主机的上下文，通过切换 context 就能让本地的 docker 命令作用在不同的 Docker 主机上。
+
+本地开发机：
+
+```shell
+docker context use default
+```
+
+远程服务器要配置好 ssh 免密登陆，然后使用下面命令添加 context：
+
+```shell
+docker context create my-server --docker "host=ssh://[email protected]"
+docker context create my-server --docker "host=CompanyServer1"
+```
+
+这里的 `CompanyServer1` 是 ssh 配置，例如这样
+
+```ssh
+Host CompanyServer1
+    Hostname 192.168.0.106
+    User root
+    Port 22
+    IdentityFile ~/.ssh/id_rsa_company
+```
+
+其中 `IdentityFile` 是存放无密码密钥的地方，如果你的密钥密钥密码就不需要这一行，否则需要设置一个没有密码的密钥，例如这样
+
+```shell
+ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa_company -N ""
+```
+
+配置好后就可以在本地连接服务器 docker 了
+
+```shell
+docker context list
+```
+
+输出类似这样
+
+```
+NAME              DESCRIPTION                               DOCKER ENDPOINT                                     ERROR
+company-server                                              ssh://CompanyServer1
+default           Current DOCKER_HOST based configuration   unix:///***/docker.sock
+desktop-linux *   Docker Desktop                            unix:///***/docker.sock
+```
+
+使用命令 use 切换 context
+
+```shell
+docker context use company-server
+```
+
+如果要删除 context，使用 remove 命令
+
+```shell
+docker context remove company-server
+```
+
+那么使用 docker context 和登陆服务器再用 docker 相比有什么好处呢？
+
+一大优势就是，当前的 AI Agent 还不能登陆到服务器里面去，如果你的 docker 镜像出了问题，想要 ai 帮你排查，那么使用 context 就很方便，ai 运行 docker 命令直接作用于服务器。

content/posts/2025-11-27_docker-context.md

@@ -51,10 +51,16 @@
 <span class="max-w-[4rem] md:max-w-none truncate">Home</span></a></li><li class="flex items-center gap-1 md:gap-2 min-w-0"><span class="text-muted-foreground/50 flex-shrink-0"><svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"/></svg>
 </span><span class="text-foreground flex items-center gap-0.5 md:gap-1 font-medium min-w-0 flex-shrink-0"><svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 8h14M5 8a2 2 0 110-4h14a2 2 0 110 4M5 8v10a2 2 0 002 2h10a2 2 0 002-2V8m-9 4h4"/></svg>
 <span class="max-w-[3rem] md:max-w-none truncate">Archives</span></span></li></ol></nav><header class=mb-8><div class="mb-4 flex items-center gap-3"><svg class="h-6 w-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 8h14M5 8a2 2 0 110-4h14a2 2 0 110 4M5 8v10a2 2 0 002 2h10a2 2 0 002-2V8m-9 4h4"/></svg><h1 class="text-foreground text-3xl font-bold">Archives</h1></div><p class="text-muted-foreground mb-6">Browse all articles in chronological order and discover what interests you.</p><div class="text-muted-foreground flex items-center gap-4 text-sm"><div class="flex items-center gap-1"><svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/></svg>
-<span>80 posts total</span></div><div class="flex items-center gap-1"><svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
-<span>Timeline view</span></div></div></header><div class=relative><div class="bg-border absolute top-0 bottom-0 left-4 w-0.5"></div><div class=mb-12><div class="relative mb-8 flex items-center"><div class="bg-primary absolute left-0 z-10 flex h-8 w-8 items-center justify-center rounded-full"><svg class="h-4 w-4 text-primary-foreground" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg></div><div class=ml-12><h2 class="text-foreground text-2xl font-bold">2025</h2><p class="text-muted-foreground text-sm">78
-posts</p></div></div><div class="relative mb-8"><div class="relative mb-4 flex items-center"><div class="bg-accent border-background absolute left-2 z-10 h-4 w-4 rounded-full border-2"></div><div class=ml-12><h3 class="text-foreground text-lg font-semibold">November 2025</h3><p class="text-muted-foreground text-xs">19
-posts</p></div></div><div class="ml-12 space-y-3"><article class="group bg-card border-border hover:bg-accent/50 rounded-lg border p-4 transition-all duration-300"><div class="flex items-center justify-between gap-4"><div class="min-w-0 flex-1"><h4 class="text-foreground group-hover:text-primary mb-3 font-medium transition-colors duration-200"><a href=/posts/python-asyncio-02-asyncio-basics-part-2/ class=block>Python Asyncio 02: Asyncio Basics Part 2</a></h4><div class="text-muted-foreground flex items-center gap-4 text-xs"><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
+<span>82 posts total</span></div><div class="flex items-center gap-1"><svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
+<span>Timeline view</span></div></div></header><div class=relative><div class="bg-border absolute top-0 bottom-0 left-4 w-0.5"></div><div class=mb-12><div class="relative mb-8 flex items-center"><div class="bg-primary absolute left-0 z-10 flex h-8 w-8 items-center justify-center rounded-full"><svg class="h-4 w-4 text-primary-foreground" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg></div><div class=ml-12><h2 class="text-foreground text-2xl font-bold">2025</h2><p class="text-muted-foreground text-sm">80
+posts</p></div></div><div class="relative mb-8"><div class="relative mb-4 flex items-center"><div class="bg-accent border-background absolute left-2 z-10 h-4 w-4 rounded-full border-2"></div><div class=ml-12><h3 class="text-foreground text-lg font-semibold">November 2025</h3><p class="text-muted-foreground text-xs">21
+posts</p></div></div><div class="ml-12 space-y-3"><article class="group bg-card border-border hover:bg-accent/50 rounded-lg border p-4 transition-all duration-300"><div class="flex items-center justify-between gap-4"><div class="min-w-0 flex-1"><h4 class="text-foreground group-hover:text-primary mb-3 font-medium transition-colors duration-200"><a href=/posts/docker-context/ class=block>Docker Context</a></h4><div class="text-muted-foreground flex items-center gap-4 text-xs"><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
+<time datetime=2025-11-25>11-25</time></div><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3A9 9 0 113 12a9 9 0 0118 0z"/></svg>
+<span>1
+min</span></div></div></div></div></article><article class="group bg-card border-border hover:bg-accent/50 rounded-lg border p-4 transition-all duration-300"><div class="flex items-center justify-between gap-4"><div class="min-w-0 flex-1"><h4 class="text-foreground group-hover:text-primary mb-3 font-medium transition-colors duration-200"><a href=/posts/fastapi-app-and-request/ class=block>FastAPI app and request</a></h4><div class="text-muted-foreground flex items-center gap-4 text-xs"><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
+<time datetime=2025-11-25>11-25</time></div><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3A9 9 0 113 12a9 9 0 0118 0z"/></svg>
+<span>3
+min</span></div></div></div></div></article><article class="group bg-card border-border hover:bg-accent/50 rounded-lg border p-4 transition-all duration-300"><div class="flex items-center justify-between gap-4"><div class="min-w-0 flex-1"><h4 class="text-foreground group-hover:text-primary mb-3 font-medium transition-colors duration-200"><a href=/posts/python-asyncio-02-asyncio-basics-part-2/ class=block>Python Asyncio 02: Asyncio Basics Part 2</a></h4><div class="text-muted-foreground flex items-center gap-4 text-xs"><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>
 <time datetime=2025-11-21>11-21</time></div><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3A9 9 0 113 12a9 9 0 0118 0z"/></svg>
 <span>6
 min</span></div></div></div></div></article><article class="group bg-card border-border hover:bg-accent/50 rounded-lg border p-4 transition-all duration-300"><div class="flex items-center justify-between gap-4"><div class="min-w-0 flex-1"><h4 class="text-foreground group-hover:text-primary mb-3 font-medium transition-colors duration-200"><a href=/posts/python-asyncio-02-asyncio-basics-part-1/ class=block>Python Asyncio 02: Asyncio Basics Part 1</a></h4><div class="text-muted-foreground flex items-center gap-4 text-xs"><div class="flex items-center gap-1"><svg class="h-3 w-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5A2 2 0 003 7v12a2 2 0 002 2z"/></svg>