Docker run as user

Docker run as user. Description. There are additional steps you can take to lock down docker in general: Use user namespaces. You can use it or just the 2/3 first characters to go into your container using: docker exec -it container_id /bin/bash Jun 1, 2020 · I have a Docker image which contains an analysis pipeline. 0 4448 692 ? Sep 3, 2019 · I know that one can use the --user option with Docker to run a container as a certain user, but in my case, my Docker image has a user inside it, let us call that user manager. Nov 5, 2020 · Use the Docker Run command to run the container. Apr 3, 2023 · To run the SQL Server container as a different non-root user, add the -u flag to the docker run command. sudo -u test whoami But it seems better to use the official supported instruction. Avoid running containers as root and improve security by switching to a non-root user. It doesn't create the user, though. Mar 18, 2024 · To run a Docker container as a different user, we can use the –user option of the docker run command. NOTE : Ensures that bash is the default shell. $ Docker runs processes in isolated containers. To create the docker group and add your user: Create the docker group. Explore Docker Debug now. Let’s try it. But then I (ofcourse) don’t have access to my own WSL2 distribution because that Portainer is a Universal Container Management System for Kubernetes, Docker/Swarm, and Nomad that simplifies container operations, so you can deliver software to more places, faster. Both Docker Desktop as my Windows 10 are fully up-to-date (Windows 10 20H2). env file values. Under the hood, docker run command is an alias to docker container run. 3 WORKDIR /opt/app COPY package. OCI runtime exec failed: exec failed: container_linux. d/toto. マルチユーザーを想定して、コンテナを動かすときにユーザーのIDを指定したうえで、コンテナ内のコマンドが実行できるのか、手元の環境 docker 1. Hence, the normal users can't perform most Docker commands. In the command line, you need to run docker run: Jul 31, 2020 · The documentation for docker run --user is short, I wil paraphrase documentation for Dockerfile USER command: root (id = 0) is the default user within a container Docker is insecure by design, if a user can run docker command without admin rights (. Warning: The docker group is equivalent to the root user; For details on how this impacts security in your system, see Docker Daemon Attack Surface for details. 11 to disable Apr 26, 2021 · In order to use Docker, you don't need to be a root user, you just need to be inside of the docker user group. In my usual workflow, switching a user should rebuild the image because I want to verify that the build process works for any user that should install/run the image. Alternatively you can run a command as a different user with sudo with something like. ) $ docker build Jun 14, 2022 · I have created a docker file and running it as a root user - Following is my docker file. How can you achieve that ? The solution for docker run as user command line For docker run as user command. 16-1 Note the user is still not set, we need to tell Docker to use this new user. 6. These are defined on the entire daemon, require that you Jun 9, 2016 · RUN chgrp -R 0 /run && chmod -R g=u /run This will change the group for everything in the /run directory to the root group and then set the group permission on all files to be equivalent to the owner (group equals user) of the file. I tested this on Ubuntu 18. 0, you can specify that a group other than docker should own the Unix socket with the -G option. (For example, examine the step before a RUN step to see what the filesystem looks like before it executes, or after to see its results. When you exit the container, you can do all the damage you want to the host Jul 28, 2015 · docker run するときに UID, GIDを指定する. A list of all docker container run options can be found on the Docker documentation page. After creating the Dockerfile, we can now create the Docker Image using the Build command. This article shows you how to achieve that with your Python Finally, if you run Docker on a server, it is recommended to run exclusively Docker on the server, and move all other services within containers controlled by Docker. docker run -it [myimage] OR. But this user should be able to use sudo inside the container. This process involves adding user creation steps in your Dockerfile and adjusting the file permissions accordingly. Modifying the Dockerfile Jul 21, 2018 · You were not using the --user flag in docker run to run the container as the specified user. sudo docker run -it nonroot-demo bash You can see that the user has been changed to the non-root user that we created in the Dockerfile. User bob with access to docker can run a container as any uid (this is the docker run -u 1234 some-image option to run as uid 1234). For example, it requires root access in the first place, parts of the container (such as conmon) are still running as root and a vulnerability somewhere in the stack might render the user protection useless. Find out the prerequisites, limitations, and features of this security option. Make sure the uid/gid of the user that executes the main process inside the container matches the owner of the folder you map into the container as volume. The docker run command runs a command in a new container, pulling the image if needed and starting the container. 04 server and it worked just fine! Nov 16, 2020 · Mounting the host's passwd/group is a nice trick (+1), but it has the drawback that it involves declaring a bunch of non-existent users and groups within the container, as well as a home directory path that (probably) doesn't even exist within the container: cd ~ → bash: cd: /home/will: No such file or directory. What is the Docker security risk of /var/run/docker. @justin is saying that creating a new docker user is best practices in any case Dec 27, 2017 · For those who use docker, you can build your own redis image with non-root user as the following: FROM redis:6. Nov 7, 2016 · To achieve the desired behavior without changing owner / permissions on the host system, do the following steps. Mar 5, 2019 · 1- Execute docker command with non-root user. For some reason, Docker seems to be making any home directory owned by the first non-root user it encounters (even if that user is declared on an earlier image). sock? Apr 10, 2020 · Since that Unix socket is owned by the root user, the Docker daemon will only run as the root user. A container on the other side can run processes as root or a restriced user. The output would be root on both (unless of course you run USER beforehand). Navigate to Local Users and Groups > Groups > docker-users. To create a Docker group, you can use the following command. If however you do: RUN whoami USER test RUN whoami You should see root then test. If you launched a container as the wrong user, delete it and recreate it with the correct docker run -u option FROM fedora:29 RUN groupadd -r swuser -g 433 && \ useradd -u 431 -r -g swuser -s /sbin/nologin -c "Docker image user" swuser USER root RUN dnf install -y vim USER swuser USER root : Switch to the root user to perform actions that need elevated permissions, such as installing software via yum/dnf. Dec 29, 2017 · You can use docker run option --user. Mar 23, 2019 · After the emersion of the runC container runtime bug it’s finally the time to run processes in Docker containers as non-root user. For more information on using Docker without sudo access, please see the Executing the Docker Command Without Sudo section of our How To May 26, 2023 · sudo Access. The docker daemon must always run as the root user, but if you run the docker client as a user in the docker group then you don't need to add sudo to all the client commands. Right-click to add the user to the group. For details on how this impacts security in your system, see Docker Daemon Attack Surface. Like in docker docker run --user &lt;user&gt; &lt;image&gt; Is there any yaml configuration for running with Jan 26, 2021 · While we can run containers as root and have its process execute as a non-root user on the host (which is good), there are still a few downsides. To run Docker as a non-root user, you have to add your user to the docker group. In the same vein, to run Docker commands without the prefix sudo, we’d create a Unix group called docker and then add our user sally to the docker group: $ sudo groupadd docker $ sudo usermod -aG docker sally $ su - sally If your administrator account is different to your user account, you must add the user to the docker-users group: Run Computer Management as an administrator. Share. Let’s run the whoami command to find out the user name of the logged-in user: Dec 27, 2018 · #!/bin/sh # docker-entrypoint. You need to run the appropriate chown and chmod commands to change the permissions of the directory. May 27, 2018 · But this doesn't tell you who ran the docker command that started the container. Aug 3, 2022 · BY default when you run. Sign out and sign back in for the changes to take effect. 6-jdk-11-slim WORKDIR /app COPY . sudo is an acronym for Super User Do. In Debian and Ubuntu as Nov 21, 2017 · $ docker build -t so-test . 04 (same applies to Linux Mint Ulyana) you may find that after installing docker you have to add your user to docker group by the following command: As you can see here or here is hardcoded the fact of append the uid and gid of the user that is running Jenkins (in your case, the Jenkins user created inside the oficial docker image). get the ID of the desired user and or group you want the permissions to match with executing the id command on your host system - this will show you the uid and gid of your current user and as well all IDs from all groups the user is in. Aug 5, 2018 · In my system, my user jtreminio has user ID 1000 and group ID 1000, so the new line-u $(id -u ${USER}):$(id -g ${USER}) gets interpreted as-u 1000:1000. To run a Docker container as a non-root user, you need to create a user with limited privileges inside the container. g. Jun 26, 2019 · How to run docker container as current user & group If you want to prevent your docker container creating files as root, use--user $(id -u): $(id -g) as an Nov 17, 2020 · In lot of instructions how to run docker on Ubuntu 20. Apr 25, 2024 · This tutorial assumes you already have Docker installed and your user has permission to run docker. yml file which is NOT documented in the Docker Compose File Reference @yamenk helpfully provides in the accepted answer. sudo docker exec -it --user root oracle18se /bin/bash I get. If default shell is /bin/sh you can do like: RUN ln -sf /bin/bash /bin/sh RUN useradd -ms /bin/bash vault Dec 17, 2019 · sudo docker exec -it -u 0 oracle18se /bin/bash or . On Linux: If there is not already a docker group, you can create one using the command sudo groupadd docker. Yet the article claims "The docker group grants privileges equivalent to the root user". with an earlier RUN instruction. Apr 18, 2019 · And to be able to run sudo without a password, you do: echo "vlatka ALL=(ALL) NOPASSWD: ALL" > /host/etc/sudoers. txt In the host file system, that file will be owned by root. The user needs to run the commands with the sudo prefix, if he/she wants to run as superuser, like the following:- Unlike the Linux Docker engine and containers which run in a VM, Windows containers are an operating system feature, and run directly on the Windows host with Administrator privileges. RUN mvn clean dependency:go-offline RUN chmod +x run. Step 3: Run the Docker Container. 12です。何かお気づきの点があればコメントいた… Nov 17, 2022 · docker run --rm -v $(pwd):/app ubuntu touch /app/test. sudo docker build -t user-demo . As of 0. A container is a process which runs on a host. EXPOSE 3000 USER node CMD ["node", "server. create a docker group and add your current user to it. Create a docker group if there isn’t one: After creating a container in docker docker run -it -d --name my-container my-image I want to execute a command as specific user (according to docker exec) docker exec -it --user my-user my-cont There's no magic solution here: permissions inside docker are managed the same as permissions without docker. When the Docker daemon starts, it makes the ownership of the Unix socket read/writable by the docker group. Method 1 – Add user to Docker group. Additionally, appending attributes to the command's basic syntax allows the user to customize container storage, networking, performance, and other settings. . 2. Aug 23, 2017 · The suggested trick assumes that the numeric user IDs (both those used by the image and the one used to run the image) agree with those in the host /etc/passwd. No idea how exactly it can be done on Windows but it "just works" on Linux. To run Docker without root privileges, see Run the Docker daemon as a non-root user (Rootless mode). RUN mkdir -p /home/nonroot # Create an non-root user so our program doesn't run as root. Why? Only root processes can listen to ports below 1024 Oct 22, 2014 · If we had only added one user in the above example, everything would have gone more smoothly. If this is your case and don't want to run docker command with root user, follow this link. Feb 16, 2021 · I’ve been using Docker for a while now and since the last 2 months that Docker Desktop doesn’t start anymore. Running as the User. i. sh # Initially launches as root /app/do-initial-setup # Switches to non-root user to run real app su-exec myapp:myapp "$@" Both docker run and docker exec take a -u argument to indicate the user to run as. By running the container with the same UID and GID as your user, the file will be owned by you instead Jun 6, 2020 · docker container run [OPTIONS] IMAGE [COMMAND] [ARG] The old, pre 1. For example, running the Alpine Linux image with the command whoami will give us the root username, which is the default user according to the image Dockerfile: $ docker run --rm alpine:latest whoami root The docker group grants root-level privileges to the user. This is another major concern from the security perspective because hackers can gain root access to the Docker host by hacking the application running inside the container. First, create the docker group. sh"] I want to run it as non-root user. Run the Container in the Aug 26, 2020 · docker run -d repository docker run -d repository:tag docker run -d image_id Then you can check your container is running using. Note. Discovered another way to set not only the user but also the group in a docker-compose. Dec 29, 2021 · If you need to run the container with a specific user or group (probably to access some external filesystem-based storage) you can docker run -u the container with that alternate user ID without editing the Dockerfile. It can be used to specify either an UID without a name: docker run --user 1000 Or specify UID and GID without a name: docker run --user 1000:100 or specify a name only without knowing which UID the user will get: docker run --user newuser Jun 26, 2024 · Learn how to use the USER instruction in a Dockerfile to set the user and group IDs for your containers. docker run --user $(id -u):$(id -g) myimage However that leaves the user inside the container without a name which inhibits the execution of some programs. sh is as follows Now build the image (you can replace user with your own docker hub user id, but it shouldn’t matter for this exercise): docker build -t user/nginx:1. To create the docker group and add your user: Run the Docker daemon as a non-root user (Rootless mode) Rootless mode allows running the Docker daemon and containers as a non-root user to mitigate potential vulnerabilities in the daemon and the container runtime. # At the end, set the user to use when running this image USER node My simplified Dockerfile currently looks like this: FROM node:6. The –workdir option sets the working directory to the user’s home directory, while the –volume option mounts necessary files from the host to the container. With that docker will run the container using my local user if it exist or not into the container. Sep 20, 2018 · As we can see here, the id of the first user in an alpine image is 1000, different from the uid 999 of an ubuntu image. FROM alpine:latest # Create a group and user RUN addgroup -S appgroup && adduser -S appuser -G appgroup # Tell docker that all future commands should run as the appuser user USER appuser Jul 2, 2019 · Note that the edit to this question which added an application-specific fail case doubling the question length was rolled back. Users are encouraged to use the new command syntax. The below works fine and I can run the image as well. 1. See "man sudo_root" for details. Mar 18, 2024 · Learn how to use the USER directive in the Dockerfile to change the user and group of the image or container. sudo docker run -it user-demo bash. Additionally, when mounting volumes, Docker respects the UID and GID of the files and directories on the host machine, which can affect how files are accessed or modified from within the container. FROM maven:3. docker attach [mycontainer] You connect to the terminal as root user, but I would like to connect as a different user. If you want to run Docker as non-root user in Linux, you need to do the following steps. The non-root container has the restriction that it must run as part of the root group unless a volume is mounted to /var/opt/mssql that the non-root user can access. /run. Aug 11, 2020 · Unless rootless docker is used, the docker engine is always running as root user. The run. Edits should "clarify the meaning of the post," according to the Help Center. json failed: permission denied": unknown If I do. Jun 26, 2024 · When a Docker container is run, it can be configured to run as a specific user with a designated UID and GID. Install from the command line Run command with all service's ports enabled and mapped to the host--use-aliases: Use the service's network useAliases in the network(s) the container connects to-u, --user: Run as specified username or uid-v, --volume: Bind mount a volume-w, --workdir: Working directory inside the container The USER instruction sets the user name or UID to use when running the image and for any following RUN directives. Essentially, any user in the root group has the same permissions as the owner for every file. 13 syntax is still supported. d/user ---> Using cache ---> 05c3f3c7e9fc Step 3 : RUN su - user -c "touch me" ---> Running in 584ab0ad025b ---> 66ea558b9855 Removing intermediate container 584ab0ad025b Step 4 : CMD su Why not use the rootless bitnami/nginx image: $ docker run --name nginx bitnami/nginx:latest More info; To verify it is not running as root but as your standard user (belonging to the docker group): Jun 13, 2018 · First question (run as non-root user): based on Post-installation steps for Linux, to run docker as non-root, we create the docker group and add the user to it. Maybe this can minimize May 12, 2016 · Once the gitlab-runner is registered (yes, it will be installed under the user gitlab-runner and working directory /home/gitlab-runner) you can execute the following to change the runner's user May 29, 2024 · $ docker exec -it baeldung bash To run a command as administrator (user "root"), use "sudo <command>". Alpine uses the command adduser and addgroup for creating users and groups (rather than useradd and usergroup). yml:. Jan 6, 2020 · How to run nginx as non-privileged user with Docker nginx is an open-source solution for web serving and reverse proxying your web application. Step 4: Verify RUN npm install -only=production # Create a user group 'xyzgroup' RUN addgroup -S xyzgroup # Create a user 'appuser' under 'xyzgroup' RUN adduser -S -D -h /usr/app/src appuser xyzgroup # Chown all the files to the app user. The docker exec command runs a new command in a running container. RUN chown -R appuser:xyzgroup /usr/app # Switch to 'appuser' USER appuser # Open the mapped port EXPOSE 3000 # Start the Jun 26, 2017 · If we run those two command separately (COPY <host_path> <source_path>; chown other_user:other_user) then it created one extra layer which eventually doubles the image size. sudo docker exec -it oracle18se /bin/bash Jul 13, 2023 · 「docker run」コマンドの使用方法について理解したいですか？「docker run」はDockerコンテナーを起動する基本的なコマンドで、システムの基本設定やアプリケーションの運行に役立ちます。当記事では、「docker run」の使用法を具体的なコードと共に詳細に解説しています。Docker初心者の方は必見 Mar 9, 2015 · To deal with permissions issues and volumes i use to run docker or docker-compose, when i’m developing, using-u $(id -u):$(id -g). I am using Docker in combination with WSL2. May 28, 2022 · 最近、Dockerのコンテナの実行ユーザーと権限の関係について調べ直したので、内容をまとめました。検証対象のDockerのバージョンは20. If we add a user in an alpine image and run a process with this user (using the USER instruction in the Dockerfile, for instance), we will see the uid 1000 as the owner of the process. So if I understand this sentence correctly, we don't run the docker as root, but we run it as a docker run - run this container, initially building locally if necessary -it - attach a terminal session so we can see what is going on -p 1880:1880 - connect local port 1880 to the exposed internal port 1880 -v node_red_data:/data - mount a docker named volume called `node_red_data` to the container /data directory so any changes made to flows are persisted --name mynodered - give this From version 4. js"] So, all the files added during image build are owned by root, but node server. – abhishek thakur Commented Dec 5, 2018 at 5:12 Sep 15, 2014 · Normally, docker containers are run using the user root. Plus, you can bring along your favorite debugging tools in its customizable toolbox. Use the Docker Run command to run the Container. Mar 2, 2016 · Simply add the option --user <user> to change to another user when you start the docker container. ) What is the difference between the "RUN" and "CMD" instructions ? Feb 3, 2018 · Is there any way I can run container in k8s as root user or other user. I'd like to use a different user, which is no problem using docker's USER directive. RUN npm install COPY . Method 2: By adding a user to the Docker group. Nov 9, 2022 · Using the USER option, we have then switched the user. You put it “in front” of your different services, and nginx can route the traffic to the correct url. Follow the steps to define and set build ARGs, docker-compose variables and . Sep 1, 2020 · In Docker, all folders are owned by root. Mar 23, 2020 · docker-compose run -u root <service> bash If you're in the process of debugging your image build, note that each build step produces an image, and you can run a debugging shell on that image. There is a side effect when using this flag: user remapping will not be enabled for that container but, because the read-only (image) layers are shared between containers If you run this image with docker run -it --rm -p 80:80 --name test apache, you can then examine the container's processes with docker exec, or docker top, and then ask the script to stop Apache: $ docker exec -it test ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0. sh ENTRYPOINT [". Aug 5, 2021 · @KarlKnechtel If I understand correctly, the RUN pip command in the Dockerfile is run by the container's root user by default, regardless of which host system user invoked docker build . That’s useful for micro-services, for example. Lets inspect the image we just created: docker image inspect user/nginx:1. d/user && chmod 0440 /etc/sudoers. See how to avoid security risks, manage permissions, and switch between users with UID/GID or username/groupname. 10. The host may be local or remote. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Jul 11, 2024 · Introduction. go:345: starting container process caused "chdir to cwd (\"/home/oracle\") set in config. $ docker run --rm -it so-test bash I am root uid=0(root) gid=0(root) groups=0(root) exemple@37b01e316a95:~$ id uid=1000(exemple) gid=1000(exemple) groups=1000(exemple) It's just a simple example, you can also use the su -c option to run command with changing user. docker ps docker ps gives you a container ID. 0 で確認してみた。 Aug 30, 2019 · However, the user you start the container as is the same as the user used for docker exec, and since you need to start as root, your exec will run as root unless you override it with a -u flag. Feb 6, 2024 · The docker run command uses the –user option to set the user’s UID and GID in the container. You need to have done that already (e. By giving sudo access to any user we can control what all commands a user can run in the privileged mode. 16-1 . Nov 2, 2023 · Add User to Docker Group. When you execute docker run, the container process that runs is isolated in that it has its own file system, its own networking, and its own isolated process tree separate from the host. Mar 18, 2024 · Let’s add our user sally to a secondary group called myuser: $ sudo usermod -aG myuser sally. js is run as the node Feb 11, 2018 · Setting both a User AND a Group in docker-compose. Without knowing your directory structure, I guess your problem is, that your user 1001 (or the setup programm which is run with 1001's permission) tries to access directories that (probably) are owned by root. You can change the user that runs the processes inside your Jenkins image passing the --user (or -u) argument to the docker run command. 1 0. belongs to docker group) this basically means that this user can escape the container and become admin on the host. Jul 20, 2020 · I think you are looking for the answer in this question: How to add users to a docker container RUN useradd -ms /bin/bash janedoe <-- this command adds the user usermod -aG sudo janedoe <-- this command tells the container to put the user janedoe inside the SUDO group Apr 24, 2018 · The USER instruction sets the user name or UID to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile. Sep 8, 2016 · $ docker build -t user . Per default, nginx runs as root user. e. . The docker run command lets you create and execute OCI-compatible containers using container images. Using this i avoid creating user 1000 inside the container and only used when developing. Aug 8, 2024 · Setting Up a Non-Root User in Docker Creating a Non-Root User. To run this pipeline, I need to provide input data and I want to keep the outputs. Docker Debug is a replacement for debugging with docker exec. Jan 27, 2022 · Stack Exchange Network. Oct 4, 2022 · Learn how to fix permission errors with volumes when using Docker containers as a non-root user with a custom UID / GID. Follow edited Jul 23, 2018 at 4:55. Of course, it is fine to keep your favorite admin tools (probably at least an SSH server), as well as existing monitoring/supervision processes, such as NRPE and collectd. 0. Find useful tips and solutions from other Docker users. Sep 30, 2020 · To start a docker container with the current user I can call docker run with the --user parameter like. To run the docker command without sudo, add the user to the docker group as follows. Step 1 : FROM fedora:24 ---> f9873d530588 Step 2 : RUN dnf install -y sudo && adduser user && echo "user ALL=(root) NOPASSWD:ALL" > /etc/sudoers. json . This pipeline must be able to be run by other users than To disable user namespaces for a specific container, add the --userns=host flag to the docker container create, docker container run, or docker container exec command. With it, you can get a shell into any container or image, even slim ones, without modifications. This does exactly what we want, but of course there is a catch: the container user is no longer root, or whatever the author decided to use. Most images that haven't been hardened will default to running as root no matter the user that starts the container. 10-alpine # Create the home directory for the new non-root user. Step 2: Build the Docker Image. 18 and later, Docker Desktop for Mac provides greater control over functionality that's enabled during installation. If they don't (as I would expect in general), the workarounds would not be generally safe either. You can restart a stopped container with all its previous changes intact using docker start. For organizations who don't want their developers to run Windows containers, a –no-windows-containers installer flag is available from version 4. For example it is not possible to mount a directory via fuse as a user without a name. answered Jul 23, 2018 Aug 2, 2019 · FROM debian:9 RUN apt update && \ apt upgrade -y && \ # Adjust the user id 1000 to match the user id in your Linux host useradd -m -u 1000 -s /usr/bin/bash stackoverflow # Ensures that the docker container always start with this user, unless we # explicit override it with docker run --user username . For docker attach or docker exec: Since the command is used to attach/execute into the existing process, therefore it uses the current user there directly. Aug 3, 2014 · Learn how to run a windows docker container with the current host user from this question and answer page. 9. sudo groupadd docker Mar 29, 2023 · Also, login into a Linux shell using one user and running the docker as another user (using the --user) is something I'm trying to avoid. Learn how to install and use Docker daemon and containers without root privileges using rootless mode. When I start Docker Desktop with “run as administrator” it starts up fine. If you need to run docker as the root user, please remember to prepend sudo to the commands in this tutorial. That is why the accepted answer adds a new user in the Dockerfile. The first time Docker Desktop for Mac launches, it presents an installation window where you can choose to either use the default settings, which work for most developers and requires you to grant privileged access, or use advanced settings. uwcf gouzuue jsh nsk kzuqevkxq bikp cnwtio lytopu cicri dti