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@ -29,30 +29,19 @@ $ docker run -it --rm --name my-running-app my-nodejs-app
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### Notes
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### Notes
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The image assumes that your application has a file named
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The image assumes that your application has a file named [`package.json`](https://docs.npmjs.com/files/package.json) listing its dependencies and defining its [start script](https://docs.npmjs.com/misc/scripts#default-values).
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[`package.json`](https://docs.npmjs.com/files/package.json) listing its
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dependencies and defining its [start
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script](https://docs.npmjs.com/misc/scripts#default-values).
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It also assumes that you have a file named [`.dockerignore`](https://docs.docker.com/engine/reference/builder/#/dockerignore-file) otherwise it will copy your local npm modules:
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It also assumes that you have a file named [`.dockerignore`](https://docs.docker.com/engine/reference/builder/#/dockerignore-file) otherwise it will copy your local npm modules:
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```
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node_modules
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node_modules
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```
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We have assembled a [Best Practices Guide](https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md) for those using these images on a daily basis.
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We have assembled a [Best Practices Guide](https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md) for those using these images on a daily basis.
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All of the images contain pre-installed versions of `node`,
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All of the images contain pre-installed versions of `node`, [`npm`](https://www.npmjs.com/), and [`yarn`](https://yarnpkg.com). For each supported architecture, the supported variants are different. In the file [architectures](https://github.com/nodejs/docker-node/blob/master/architectures), it lists all supported variants for all of the architectures that we support now.
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[`npm`](https://www.npmjs.com/), and [`yarn`](https://yarnpkg.com). For each
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supported architecture, the supported variants are different. In the file
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[architectures](https://github.com/nodejs/docker-node/blob/master/architectures),
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it lists all supported variants for all of the architectures that we support now.
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## Run a single Node.js script
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## Run a single Node.js script
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For many simple, single file projects, you may find it inconvenient to write a
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For many simple, single file projects, you may find it inconvenient to write a complete `Dockerfile`. In such cases, you can run a Node.js script by using the Node.js Docker image directly:
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complete `Dockerfile`. In such cases, you can run a Node.js script by using the
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Node.js Docker image directly:
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```console
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```console
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$ docker run -it --rm --name my-running-script -v "$PWD":/usr/src/app -w /usr/src/app node:4 node your-daemon-or-script.js
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$ docker run -it --rm --name my-running-script -v "$PWD":/usr/src/app -w /usr/src/app node:4 node your-daemon-or-script.js
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@ -60,45 +49,28 @@ $ docker run -it --rm --name my-running-script -v "$PWD":/usr/src/app -w /usr/sr
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## Verbosity
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## Verbosity
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By default the Node.js Docker Image has npm log verbosity set to `info` instead
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By default the Node.js Docker Image has npm log verbosity set to `info` instead of the default `warn`. This is because of the way Docker is isolated from the host operating system and you are not guaranteed to be able to retrieve the `npm-debug.log` file when npm fails.
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of the default `warn`. This is because of the way Docker is isolated from the
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host operating system and you are not guaranteed to be able to retrieve the
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`npm-debug.log` file when npm fails.
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When npm fails, it writes it's verbose log to a log file inside the container.
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When npm fails, it writes it's verbose log to a log file inside the container. If npm fails during an install when building a Docker Image with the `docker build` command, this log file will become inaccessible when Docker exits.
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If npm fails during an install when building a Docker Image with the `docker
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build` command, this log file will become inaccessible when Docker exits.
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The Docker Working Group have chosen to be overly verbose during a build to
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The Docker Working Group have chosen to be overly verbose during a build to provide an easy audit trail when install fails. If you prefer npm to be less verbose you can easily reset the verbosity of npm using the following techniques:
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provide an easy audit trail when install fails. If you prefer npm to be less
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verbose you can easily reset the verbosity of npm using the following
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techniques:
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### Dockerfile
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### Dockerfile
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If you create your own `Dockerfile` which inherits from the `node` image you can
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If you create your own `Dockerfile` which inherits from the `node` image you can simply use `ENV` to override `NPM_CONFIG_LOGLEVEL`.
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simply use `ENV` to override `NPM_CONFIG_LOGLEVEL`.
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```
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FROM node
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FROM node
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ENV NPM_CONFIG_LOGLEVEL warn
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ENV NPM_CONFIG_LOGLEVEL warn
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...
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...
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```
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### Docker Run
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### Docker Run
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If you run the node image using `docker run` you can use the `-e` flag to
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If you run the node image using `docker run` you can use the `-e` flag to override `NPM_CONFIG_LOGLEVEL`.
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override `NPM_CONFIG_LOGLEVEL`.
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```
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$ docker run -e NPM_CONFIG_LOGLEVEL=warn node ...
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$ docker run -e NPM_CONFIG_LOGLEVEL=warn node ...
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```
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### NPM run
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### NPM run
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If you are running npm commands you can use `--loglevel` to control the
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If you are running npm commands you can use `--loglevel` to control the verbosity of the output.
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verbosity of the output.
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```
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$ docker run node npm --loglevel=warn ...
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$ docker run node npm --loglevel=warn ...
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```
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@ -1,4 +1 @@
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[License information](https://github.com/nodejs/node/blob/master/LICENSE) for
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View [license information](https://github.com/nodejs/node/blob/master/LICENSE) for Node.js or [license information](https://github.com/nodejs/docker-node/blob/master/LICENSE) for the Node.js Docker project.
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the software contained in this image. [License
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information](https://github.com/nodejs/docker-node/blob/master/LICENSE) for the
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Node.js Docker project.
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