In your Dockerfile, run this first:

    apt-get update &amp;&amp; apt-get install -y gnupg2

or 

    apt-get update &amp;&amp; apt-get install -y gnupg

I faced the same issue:

&gt; E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation

I resolved by using the following commands:

    apt-get update
    apt-get install gnupg


In addition to existing answers:

    RUN apt-get update &amp;&amp; apt-get install -y gnupg

-y flag agrees to terms during installation process. It is important not to break the build


Just install the updated versions of all of them.

`apt-get install -y gnupg2 gnupg gnupg1`

I have debian 9 and to fix this i used the new library as follows:

    ln -s /usr/bin/gpgv /usr/bin/gnupg2



I&#39;m using tsc build tasks. Unfortunately I&#39;m always getting the same errors from the node modules folder

    Executing task: .\node_modules\.bin\tsc.cmd --watch -p .\tsconfig.json &lt;
    node_modules/@types/node/index.d.ts(6208,55): error TS2304: Cannot find name &#39;Map&#39;.
    node_modules/@types/node/index.d.ts(6215,55): error TS2304: Cannot find name &#39;Set&#39;.
    node_modules/@types/node/index.d.ts(6219,64): error TS2304: Cannot find name &#39;Symbol&#39;.
    node_modules/@types/node/index.d.ts(6225,59): error TS2304: Cannot find name &#39;WeakMap&#39;.
    node_modules/@types/node/index.d.ts(6226,59): error TS2304: Cannot find name &#39;WeakSet&#39;.
    10:13:18 - Compilation complete. Watching for file changes.

I already added the directory to the ignore at `tsconfig.json`
```json

    {
      &quot;compilerOptions&quot;: {
        &quot;target&quot;: &quot;es5&quot;,
        &quot;module&quot;: &quot;commonjs&quot;,
        &quot;sourceMap&quot;: true,
        &quot;strict&quot;: false,
        &quot;noImplicitAny&quot;: false,
        &quot;strictPropertyInitialization&quot;: false,
        &quot;esModuleInterop&quot;: true,
      },
      &quot;include&quot;: [
        &quot;src/*&quot;
      ],
      &quot;exclude&quot;: [
        &quot;node_modules&quot;,
        &quot;./node_modules&quot;,
        &quot;./node_modules/*&quot;,
        &quot;./node_modules/@types/node/index.d.ts&quot;,
      ]
    }
```
What I&#39;m doing wrong? What should I do in order to ignore those errors?

I&#39;m using VsCode and tsc Version 2.9.2

How to force tsc to ignore node_modules folder?

Apparently, none of the Flutter commands are working in the terminal of Android Studio which I believe I am trying to run it at the root of my project.

Output:

    bash: flutter: command not found





Flutter command not found

I have installed docker on windows 10 pro. I am facing an issue while running the following command in git-bash. 

docker-compose up -d --build

and got following error. 

    E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
    (23) Failed writing body
    Error executing command, exiting
    ERROR: Service &#39;web&#39; failed to build: The command &#39;/bin/sh -c curl -sL https://deb.nodesource.com/setup_8.x | bash&#39; returned a non-zero code: 1

 

E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation

I have installed docker on windows 10 pro. I am facing an issue while running the following command in git-bash.
docker-compose up -d --build
and got following error.
<pre><code class="hljs language-vbnet">E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
(23) Failed writing body
Error executing command, exiting
ERROR: Service 'web' failed to build: The command '/bin/sh -c curl -sL https://deb.nodesource.com/setup_8.x | bash' returned a non-zero code: 1
</code></pre>

I was trying to pull a docker image from a docker registry but hit the following issue:

    $ docker pull &lt;docker registry&gt;/&lt;image name&gt;/&lt;tag&gt; 
    Error response from daemon: Get &lt;docker registry&gt;/v1/_ping: x509: certificate signed by unknown authority

I tried with &quot;curl&quot; and get a similar error message:

     curl performs SSL certificate verification by default, using a &quot;bundle&quot;
     of Certificate Authority (CA) public keys (CA certs). If the default
     bundle file isn&#39;t adequate, you can specify an alternate file
     using the --cacert option.

So I downloaded the CA certificate and imported to the server (RedHat Linux 7) with the following commands:

    cp root_cert.cer /etc/pki/ca-trust/source/anchors/
    update-ca-trust

After the root cert is imported, I can see `curl` is working fine as it won&#39;t complain the cert error, however if I use `docker pull` I still have the same issue. Is `docker` using different ca-cert location than `curl`? How do I fix the issue with `docker pull` in this situation?

&quot;docker pull&quot; certificate signed by unknown authority

Why is Docker trying to create the folder that I&#39;m mounting? If I cd to C:\Users\szx\Projects

    docker run --rm -it -v &quot;${PWD}:/src&quot; ubuntu /bin/bash

This command exits with the following error:

    C:\Program Files\Docker Toolbox\docker.exe: Error response from daemon: error while creating mount source path &#39;/c/Users/szx/Projects&#39;: mkdir /c/Users/szx/Projects: file exists.

I&#39;m using Docker Toolbox on Windows 10 Home.

Docker tries to mkdir the folder that I mount

I&#39;m trying to pull the repository I&#39;m working on while doing a docker build, so I followed [this tutorial][1] so I added in my `Dockerfile`

    # this is our first build stage, it will not persist in the final image
    FROM ubuntu as intermediate
    
    # install git
    RUN apt-get update \
        apt-get upgrade \
        apt-get install git
    
    # add credentials on build
    RUN mkdir ~/.ssh &amp;&amp; ln -s /run/secrets/host_ssh_key ~/.ssh/id_rsa
    
    # make sure your domain is accepted
    RUN touch /root/.ssh/known_hosts
    RUN ssh-keyscan github.org &gt;&gt; /root/.ssh/known_hosts
    
    RUN git clone git@github.com:my-repo/myproject.git
    
    FROM ubuntu
    # copy the repository form the previous image
    COPY --from=intermediate /your-repo /srv/your-repo

In my `docker-compose.yml` I added

    secrets:
      host_ssh_key:
        file: ~/.ssh/id_rsa

And I&#39;m adding

    secrets:
      - host_ssh_key

In one of the service.

Since this is only for my local use (I don&#39;t plan on deploying or using this for the production, I just want to test it out) it&#39;s fine to use it this way - if it&#39;ll work because currently the build fails at the git install stage with error

&gt; E: The update command takes no arguments
&gt;
&gt; ERROR: Service &#39;web&#39; failed to build: The command &#39;/bin/sh -c apt-get update  apt-get upgrade     apt-get install git&#39; returned a non-zero code: 100

What am I missing?

  [1]: https://vsupalov.com/build-docker-image-clone-private-repo-ssh-key/

git install fails in Dockerfile

How to be with orphan images when you have 2 independent projects and you want them to work at the same time or at least to build running `docker-compose up -d` without `--remove-orphans` flag when images are already built for another project. 

docker compose file1:

    version: &#39;2&#39;
    services:
      applications:
        image: tianon/true
        volumes:
          - ../../:/var/www/vhosts/project1
      nginx:
        build: ./images/nginx
        image: project1/nginx:latest
        ports:
          - &quot;80:80&quot;
        volumes_from:
          -  applications
        networks:
          appnet:
            aliases:
              - project1.app
              - admin.project1.app
      php:
        image: project1/php:latest
        ports:
          - &quot;7778:7778&quot;
        build: 
          context: ./images/php
          dockerfile: Dockerfile
        volumes_from:
          -  applications
        networks:
          -  appnet
      mysql:
        image: project1/mysql:latest
        build: ./images/mysql
        environment:
          MYSQL_ROOT_PASSWORD: secret
        volumes:
          -  mysqldata:/var/lib/mysql
        networks:
          -  appnet
        ports:
          - &quot;33066:3306&quot;
     workspace:
        image: project1/workspace:latest
        build:
          context: ./images/workspace
        volumes_from:
          - applications
        working_dir: /var/www/vhosts/project1
        networks:
          -  appnet
    networks:
      appnet:
        driver: &quot;bridge&quot;
    volumes:
       mysqldata:
        driver: &quot;local&quot;



the second docker compose file:


    version: &#39;2&#39;
    services:
      project2_applications:
        image: tianon/true
        volumes:
          - ../../:/var/www/vhosts/project2
      project2_nginx:
        build: ./images/nginx
        image: project2/nginx:latest
        ports:
          - &quot;8080:80&quot;
        volumes_from:
          -  project2_applications
        networks:
          project2_appnet:
            aliases:
              - project2.app
              - admin.project2.app
      project2_php:
        image: project2/php:latest
        ports:
          - &quot;7777:7777&quot;
        build: 
          context: ./images/php
          dockerfile: Dockerfile
        volumes_from:
          -  project2_applications
        networks:
          -  project2_appnet
      project2_mysql:
        image: project2/mysql:latest
        build: ./images/mysql
        environment:
          MYSQL_ROOT_PASSWORD: secret
        volumes:
          -  project2_mysqldata:/var/lib/mysql
        networks:
          -  project2_appnet
        ports:
          - &quot;33067:3306&quot;
      project2_workspace:
        image: project2/workspace:latest
        build:
          context: ./images/workspace
        volumes_from:
          - project2_applications
        working_dir: /var/www/vhosts/videosite
        networks:
          -  project2_appnet
    networks:
      project2_appnet:
        driver: &quot;bridge&quot;
    volumes:
       project2_mysqldata:
        driver: &quot;local&quot;


And now when I have already built project1 and trying to run `docker-compose up -d` for the second project I see warning:

&gt; WARNING: Found orphan containers (docker_workspace_1, docker_nginx_1, docker_php_1, docker_mysql_1, docker_memcached_1) for this project. If you removed or renamed this service in your compose file, you can run this command with the `--remove-orphans` flag to clean it up.

I have a supposition that it&#39;s because container names for project1 should be more specific and I need to add some prefixes like I&#39;m doing for project2, but project1 is in use by many other developers and I do not want to change it.

**Is there any way to turn off orphan check?**

And the second thing: is just a warning message but for some reason, after it appearing compose is failing with error:

&gt; ERROR: Encountered errors while bringing up the project. 

And to make it work I need to run `docker-compose up -d --remove-orphans`

docker compose orphan containers warning

From what I understand about Docker, it&#39;s a tool used for virtual environments. In their lingo, its called &quot;containerization&quot;. This is more or less what Python&#39;s virtualenv does. However, you can use virtualenv *in* Docker. So, is it a virtual environment inside a virtual environment? I&#39;m confused as to how this would even work, so could someone please clarify?

What&#39;s the difference between Docker and Python virtualenv?

I have the problem with installing `node_modules` inside the Docker container and synchronize them with the host. My Docker&#39;s version is `18.03.1-ce, build 9ee9f40` and Docker Compose&#39;s version is ` 1.21.2, build a133471`. 

My `docker-compose.yml` looks like:

```yaml
# Frontend Container.
frontend:
  build: ./app/frontend
  volumes:
    - ./app/frontend:/usr/src/app
    - frontend-node-modules:/usr/src/app/node_modules
  ports:
    - 3000:3000
  environment:
    NODE_ENV: ${ENV}
  command: npm start

# Define all the external volumes.
volumes:
  frontend-node-modules: ~
```
My `Dockerfile`:

    # Set the base image.
    FROM node:10
    
    # Create and define the working directory.
    RUN mkdir /usr/src/app
    WORKDIR /usr/src/app
    
    # Install the application&#39;s dependencies.
    COPY package.json ./
    COPY package-lock.json ./
    RUN npm install

The trick with the external volume is described in a lot of blog posts and Stack Overflow answers. For example, [this one][1].

The application works great. The source code is synchronized. The hot reloading works great too.

The only problem that I have is that `node_modules` folder is empty on the host. Is it possible to synchronize the `node_modules` folder that is inside Docker container with the host?

I&#39;ve already read these answers:

 1. https://stackoverflow.com/questions/38425996/docker-compose-volume-on-node-modules-but-is-empty
 2. https://stackoverflow.com/questions/36245831/accessing-node-modules-after-npm-install-inside-docker

Unfortunately, they didn&#39;t help me a lot. I don&#39;t like [the first one][2], because I don&#39;t want to run `npm install` on my host because of the possible cross-platform issues (e.g. the host is Windows or Mac and the Docker container is Debian 8 or Ubuntu 16.04). [The second one][3] is not good for me too, because I&#39;d like to run `npm install` in my `Dockerfile` instead of running it after the Docker container is started.

Also, I&#39;ve found [this blog post][4]. The author tries to solve the same problem I am faced with. The problem is that `node_modules` won&#39;t be synchronized because we&#39;re just copying them from the Docker container to the host.

I&#39;d like my `node_modules` inside the Docker container to be synchronized with the host. Please, take into account that I want:

 - to install `node_modules` automatically instead of manually
 - to install `node_modules` inside the Docker container instead of the host
 - to have `node_modules` synchronized with the host (if I install some new package inside the Docker container, it should be synchronized with the host automatically without any manual actions)

I need to have `node_modules` on the host, because:

 - possibility to read the source code when I need
 - the IDE needs `node_modules` to be installed locally so that it could have access to the `devDependencies` such as `eslint` or `prettier`. I don&#39;t want to install these `devDependencies` globally.

Thanks in advance.

  [1]: https://stackoverflow.com/questions/30043872/docker-compose-node-modules-not-present-in-a-volume-after-npm-install-succeeds/32785014#32785014
  [2]: https://stackoverflow.com/a/43728476/4815056
  [3]: https://stackoverflow.com/a/36246223/4815056
  [4]: https://blog.sergeyev.info/docker-development-environment/

Install node_modules inside Docker container and synchronize them with host

When using a `print()` statement in a Python app running inside a Docker container that&#39;s managed by Docker Compose, only `sys.stderr` output is logged. Vanilla `print()` statements aren&#39;t seen, so this:

    print(&quot;Hello? Anyone there?&quot;)

... never shows up in the regular logs:

[![enter image description here][1]][1]

(You can see other logs explicitly printed by other libs in my app, but none of my own calls.)

How can I avoid my `print()` calls being ignored?

  [1]: https://i.stack.imgur.com/ngjrH.png

docker-compose not printing stdout in Python app

I try to work out a way to create a dev environment using docker and laravel.

I have the following dockerfile:

    
    FROM php:7.1.3-fpm
    
    RUN apt-get update &amp;&amp; apt-get install -y libmcrypt-dev \
        mysql-client libmagickwand-dev --no-install-recommends \
        &amp;&amp; pecl install imagick \
        &amp;&amp; docker-php-ext-enable imagick \
    &amp;&amp; docker-php-ext-install mcrypt pdo_mysql
    &amp;&amp; chmod -R o+rw laravel-master/bootstrap laravel-master/storage

Laravel requires composer to call composer dump-autoload when working with database migration. Therefore, I need composer inside the docker container. 

I tried:

    RUN curl -sS https://getcomposer.org/installer | php -- \
    --install-dir=/usr/bin --filename=composer

But when I call 

    docker-compose up
    docker-compose exec app composer dump-autoload

It throws the following error:

    rpc error: code = 13 desc = invalid header field value &quot;oci runtime error: exec failed: container_linux.go:247: starting container process caused \&quot;exec: \\\&quot;composer\\\&quot;: executable file not found in $PATH\&quot;\n&quot;

I would be more than happy for advice how I can add composer to the PATH within my dockerfile or what else I can do to surpass this error. 

Thanks for your support.
Also: [this][1] is the gitub repository if you need to see the docker-compose.yml file or anything else.
    


  [1]: https://github.com/andrelandgraf/laravel-docker

How to install PHP composer inside a docker container

In one folder I have 3 files: base.py, Dockerfile and docker-compose.yml.

**base.py:**

    import psycopg2
    
    conn = psycopg2.connect(&quot;dbname=&#39;base123&#39; user=&#39;postgres&#39; host=&#39;db&#39; password=&#39;pw1234&#39;&quot;)
**Dockerfile:**
    
    FROM ubuntu:16.04

    RUN apt-get update
    RUN apt-get -y install python-pip
    RUN apt-get update
    RUN pip install --upgrade pip
    RUN pip install psycopg2-binary

    COPY base.py base.py

    RUN python base.py

**docker-compose.yml:**

    version: &#39;3&#39;
    services:
      db:
        image: &#39;postgres:latest&#39;
        expose:
          - &quot;5432&quot;
        environment:
          POSTGRES_PASSWORD: pw1234
          POSTGRES_DB: base123
      aprrka:
        build: .    
        depends_on:
          - db
After I ran `docker-compose up`, I got the following error:
 
    Traceback (most recent call last):
      File &quot;base.py&quot;, line 5, in &lt;module&gt;
    conn = psycopg2.connect(&quot;dbname=&#39;base123&#39; user=&#39;postgres&#39; host=&#39;db&#39; password=&#39;pw1234&#39;&quot;)
       File &quot;/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py&quot;, line 130, in connect
        conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
    psycopg2.OperationalError: could not translate host name &quot;db&quot; to address: Name or service not known

    ERROR: Service &#39;aprrka&#39; failed to build: The command &#39;/bin/sh -c python base.py&#39; returned a non-zero code: 1

I don&#39;t know why I have this error. I exposed port 5432. By default Compose sets up a single network for app. Each service joins the default network, I think that my app with postgres should work together. Did I write incorrect docker-compose.yml?



Content Type	Original Author	Original Content on Stackoverflow
Question	Saif	View Question on Stackoverflow
Solution 1 - Docker	Anthony Mooz	View Answer on Stackoverflow
Solution 2 - Docker	srinath	View Answer on Stackoverflow
Solution 3 - Docker	gmode	View Answer on Stackoverflow
Solution 4 - Docker	Edwinner	View Answer on Stackoverflow
Solution 5 - Docker	3pepe3	View Answer on Stackoverflow

E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation

Docker Problem Overview

Docker Solutions

Solution 1 - Docker

Solution 2 - Docker

Solution 3 - Docker

Solution 4 - Docker

Solution 5 - Docker

Flutter command not found

How to force tsc to ignore node_modules folder?

Attributions