Logs and troubleshooting Estimated reading time: 15 minutes Here is information about how to diagnose and troubleshoot problems, send logs and communicate with the Docker for Mac team, use our forums and Knowledge Hub, browse and log issues on GitHub, and find workarounds for known problems. Docker Knowledge Hub Looking for help with Docker for Mac?
Jun 29, 2016 Expected behavior Install docker beta. Docker app says “running” Actually is running Actual behavior $ docker ps Cannot connect to the Docker daemon. Is the docker daemon running on this host? Information System restart has no effect docker-toolbox has never been installed, and I explicity uninstalled virtualbox. Docker for Mac beta 26 has improved support for macOS 10.12 Sierra: all the major show stopper issues which we are aware of have been fixed. If you have the opportunity, please give it a try on the latest Sierra GM seed and open fresh issues for any problems you find. You can download installers from the Stable or beta channel. Relationship to Docker Machine: Installing Docker for Mac does not affect machines you. Starting with Docker for Mac Stable release 1.13, and concurrent Edge releases, we no.
Check out the for knowledge base articles, FAQs, and technical support for various subscription levels. Diagnose problems, send feedback, and create GitHub issues If you encounter problems for which you do not find solutions in this documentation, already filed by other users, or on the, we can help you troubleshoot the log data. Choose – Diagnose & Feedback from the menu bar. You can choose to run diagnostics only, or diagnose and send the results to the Docker Team:.
Diagnose Only - Runs diagnostics, and shows results locally. (Results are not sent to Docker, and no ID is generated.). Diagnose & Upload - Runs diagnostics, shows results, and auto-uploads the diagnostic results to Docker. A diagnostic ID is auto-generated.
You can refer to this ID when communicating with the Docker Team. Optionally, you can open an issue on GitHub using the uploaded results and ID as a basis. If you click Open Issues, this opens in your web browser in a “create new issue” template prepopulated with the following:.
ID and summary of the diagnostic you just ran. System and version details. Sections where you can fill in a description of expected and actual behavior, and steps to reproduce the issue You can also create a new issue directly on GitHub at.
Start Docker Service On Mac
(The README for the repository is.) Click on that page (or right here ☺) to get a “create new issue” template prepopulated with sections for the ID and summary of your diagnostics, system and version details, description of expected and actual behavior, and steps to reproduce the issue. Check the logs In addition to using the diagnose and feedback option to submit logs, you can browse the logs yourself. Use the command line to view logs To view Docker for Mac logs at the command line, type this command in a terminal window or your favorite shell.
$ syslog -k Sender Docker /Desktop/mydockerlogs.txt Use the Mac Console for log queries Macs provide a built-in log viewer. You can use the Mac Console System Log Query to check Docker app logs. The Console lives on your Mac hard drive in Applications Utilities. You can bring it up quickly by just searching for it with Spotlight Search. To find all Docker app log messages, do the following. From the Console menu, choose File New System Log Query.
Name your search (for example Docker). Set the Sender to Docker. Click OK to run the log query. You can use the Console Log Query to search logs, filter the results in various ways, and create reports. For example, you could construct a search for log messages sent by Docker that contain the word hypervisor then filter the results by time (earlier, later, now). The diagnostics and usage information to the left of the results provide auto-generated reports on packages. Troubleshooting Make sure certificates are set up correctly Docker for Mac ignores certificates listed under insecure registries, and does not send client certificates to them.
Commands like docker run that attempt to pull from the registry produces error messages on the command line, like this. 2017/06/20 18:15:30 http: TLS handshake error from 192.168.203.139:52882: tls: client didn't provide a certificate 2017/06/20 18:15:30 http: TLS handshake error from 192.168.203.139:52883: tls: first record does not look like a TLS handshake For more about using client and server side certificates, see in the Getting Started topic. Docker for Mac does not start if Mac user account and home folder are renamed after installing the app If, after installing Docker for Mac, you, Docker for Mac fails to start. To solve this problem, uninstall and reinstall Docker for Mac under the new user account. See also, the discussion on the issue and in the FAQs. Volume mounting requires file sharing for any project directories outside of /Users If you are using mounted volumes and get runtime errors indicating an application file is not found, access to a volume mount is denied, or a service cannot start, such as when using, you might need to enable. Volume mounting requires shared drives for projects that live outside of the /Users directory.
Go to – Preferences – File sharing and share the drive that contains the Dockerfile and volume. Recreate or update your containers after Beta 18 upgrade Docker 1.12.0 RC3 release introduces a backward incompatible change from RC2 to RC3. (For more information, see (For more information, see.) You may get the following error when you try to start a container created with pre-Beta 18 Docker for Mac applications. $ docker start old-container old-container Incompatible CPU detected Docker for Mac requires a processor (CPU) that supports virtualization and, more specifically, the. Docker for Mac is only compatible with Macs that have a CPU that supports the Hypervisor framework.
Most Macs built in 2010 and later support it, as described in the Apple Hypervisor Framework documentation about supported hardware: Generally, machines with an Intel VT-x feature set that includes Extended Page Tables (EPT) and Unrestricted Mode are supported. To check if your Mac supports the Hypervisor framework, run this command in a terminal window. Sysctl kern.hvsupport If your Mac supports the Hypervisor Framework, the command prints kern.hvsupport: 1.
If not, the command prints kern.hvsupport: 0. See also, in the Apple documentation, and Docker for Mac system requirements in. Workarounds for common problems.
IPv6 workaround to auto-filter DNS addresses - IPv6 is not yet supported on Docker for Mac. If you try to use it, network timeouts occur when running docker commands that need access to external network servers, such as docker pull or docker push. $ docker pull busybox Using default tag: latest Pulling repository docker.io/library/busybox Network timed out while trying to connect to You may want to check your internet connection or if you are behind a proxy. Starting with v1.12.1, 2016-09016 on the stable channel, and Beta 24 on the beta channel, a workaround is provided that auto-filters out the IPv6 addresses in DNS server lists and enables successful network accesss. For example, 2001:4860:4860::8888 would become 8.8.8.8. So, the only workaround action needed for users is to. On releases with the workaround included to filter out / truncate IPv6 addresses from the DNS list, the above command should run properly.
Docker run -d -v /var/run/docker.sock:/var/run/docker.sock -p 127.0.0.1:1234:1234 bobrik/socat TCP-LISTEN:1234,fork UNIX-CONNECT:/var/run/docker.sock and then export DOCKERHOST=tcp://localhost:1234. There are a number of issues with the performance of directories bind-mounted with osxfs. In particular, writes of small blocks, and traversals of large directories are currently slow. Additionally, containers that perform large numbers of directory operations, such as repeated scans of large directory trees, may suffer from poor performance. Applications that behave in this way include:.
Docker On Mac
rake. ember build. Symfony. Magento. Zend Framework. PHP applications that use to install dependencies in a vendor folder As a work-around for this behavior, you can put vendor or third-party library directories in Docker volumes, perform temporary file system operations outside of osxfs mounts, and use third-party tools like Unison or rsync to synchronize between container directories and bind-mounted directories.
We are actively working on osxfs performance using a number of different techniques. To learn more, see the topic on. If your system does not have access to an NTP server, then after a hibernate the time seen by Docker for Mac may be considerably out of sync with the host. Furthermore, the time may slowly drift out of sync during use.
To manually reset the time after hibernation, run.
“But it works on my machine!” That is an excuse too often overheard in conversations between developers and operations teams. Even with sophisticated tooling, virtually unlimited computing capacity in the cloud, and advanced continuous integration workflows, the differences between developing applications locally and running them in production remains a persistent source of bugs and other problems. Dev and ops teams often turn to virtual machines, pre-built images, and/or configuration management systems like and to achieve better parity with Linux-based production environments and Mac or Windows development environments. All those approaches can help, but the problems can still persist. Fortunately, the new offers an opportunity to create a more resilient local environment that better mirrors production. MacOS and Windows have traditionally not supported the Linux-based container technology that powers Docker, but the latest release of Docker for Mac and Windows now makes it easier to get started creating and running containers in those environments with less overhead.
Let’s put a simple Node.js application in a Docker container as an example. Less fragile developer environments with Docker containers Developer workstations are fragile.
Upgrading the operating system, botched package installs, conflicting dependencies, and the need to use multiple programming language runtimes remains a persistent source of frustration for developers. Many language-specific tools have been built to manage this complexity, including for Python, for Ruby, and for Java. Docker, however, presents an elegant new alternative. Containers, like virtual machines, offer a way to isolate the complex dependencies applications require from the host operating system and other applications. Unlike VMs, containers are less resource intensive and usually take only seconds to start. Docker became a developer darling by combining Linux container technology with a specialized file system and command-line interface that also runs on Mac and Windows with the help of a Linux virtual machine.
The additional requirements needed to run Docker on non-Linux environments have been simplified in the latest beta release of Docker’s software, making it easier to work with. Once installed, Docker images, often available for popular open-source projects from the, are used to instantiate running containers that execute application code.
(Understanding the difference between a container and image is particularly important—more information is available on the.).