我成功地对在 Beaglebone black 上运行的 Nodejs 应用程序进行了 docker 化。但现在我想从 docker 容器内访问 CAN,但它不起作用。
请注意,我成功在主机中配置了 CAN 端口,并且 candump 显示它可以工作。
$ candump can1
can1 18FF30D0 [8] 00 00 00 00 00 00 00 00
can1 18FF02D0 [4] 00 00 00 00
can1 18FF21D0 [3] 00 00 00
can1 18FF3CD0 [4] 00 7D 28 7D
can1 18FF30D0 [8] 00 03 00 00 00 00 00 00
can1 18FF02D0 [4] 00 00 00 00
我在 Dockerfile 中构建了 socketcan 节点模块,如下所示:
#If you don't have node/npm already, add that first
RUN apk add --no-cache nodejs
# Add the necessary build and runtime dependencies (see https://stackoverflow.com/questions/36202095/node-serialport-failing-on-alpine-linux)
RUN apk add --no-cache make gcc g++ python3 linux-headers udev
#RUN apk add --no-cache --virtual .gyp python3 make g++
RUN npm install
从容器运行我的应用程序后,我收到以下异常:
-- 🟡- 🚎 Canbus:can0: switched to channel "can0"…
Pepsr v2.1.192 5:36:40 PM 📈 [pepsr-iingenierie] -- 🟡- 🚎 Canbus:can0: cancel CAN as other channel "can0" doesn’t work either
Pepsr v2.1.192 5:36:40 PM 📈 [pepsr-iingenierie] -- 🔴- 🚎 Canbus:can0: Error: Error while creating channel
at Object.exports.createRawChannel (/home/debian/Desktop/devel/iot/node_modules/socketcan/socketcan.js:38:12)
at Canbus._connect (/home/debian/Desktop/devel/iot/pepsr.ddk.protocol.canBus.js:308:34)
at Canbus.connect (/home/debian/Desktop/devel/iot/pepsr.module.js:272:9)
at Object.<anonymous> (/home/debian/Desktop/devel/iot/pepsr.js:608:20)
at Module._compile (internal/modules/cjs/loader.js:1015:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)
at Module.load (internal/modules/cjs/loader.js:879:32)
at Function.Module._load (internal/modules/cjs/loader.js:724:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)
at internal/main/run_main_module.js:17:47
感谢帮助我找到解决方案的贡献者。
我终于发现,让容器访问主机CAN总线最简单的方法就是使用
--network
参数,如下:
$ docker run --rm --network=host <your image>
将网络接口转发到 Docker 或多或少描述如下:与 docker 容器共享虚拟网络
当我运行 docker run 时,我已经传递了 --network 主机参数,但我仍然没有在容器中看到 can 网络,即使它在主机上可见。我在 raspi 5 上运行这个