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Running them in containers only makes sense if you like the technical challenge, want to keep a single app from hogging all your system's memory, or want to ensure that any malware you might pick up while browsing the web stays stuck inside its container, unable to escape to the rest of your Mac.Īs of this writing, the main reason I've found to run Docker on a Mac is Pi-hole, originally made for the Raspberry Pi. But most of these apps already have native Mac versions. There are Docker versions of familiar desktop apps like Firefox, Chrome, Skype, Spotify, image editor GiMP, and audio editor Audacity. Who is Docker for?Īs mentioned above, Docker's mainly aimed at programmers who want to containerize existing apps or write new ones, and businesses and IT folks who want to use its industrial-grade software. #RUNNING DOCKER IMAGE DOCKER FOR MAC INSTALL#Once you fire up the easy-to-install Docker app, it runs in the background, and you can use the Terminal or another app called Kitematic (we'll get to that later) to install and run containerized apps. And you can use Docker to run apps that weren't originally written for the Mac. Unlike those apps, you can't use Docker to run Windows on your Mac – though you can run at least limited versions of Linux with it. And because it emulates an operating system – usually some flavor of Linux, though you can also set it up to run enterprise versions of Windows – instead of actual chip hardware, it demands a lot less memory and processing power than traditional virtual machines like Parallels or VMware Fusion. How does Docker work?ĭocker uses emulation to ensure that the same containerized app can run on any machine where Docker's installed. And users get apps that won't sprawl out and spread files into their hard drives' nooks and crannies, nor start hogging memory and slowing down the entire computer. Businesses get an efficient way to run lots of apps on a single server without straining their hardware. Programmers can write an app once and know that it'll run anywhere, every time. #RUNNING DOCKER IMAGE DOCKER FOR MAC SOFTWARE#What are containerized apps?Ĭontainerized apps are tidy little packages of software that bundle nearly everything they need to run in a single, self-contained box. And while Docker's mainly aimed at programmer types, there are a few reasons why everyday Mac users might want it around as well. Two files manage the user configuration – one for the user ID range ( /etc/subuid) and the other for the group ID range ( /etc/subgid).īy default, docker uses the dockremap user and group to make the remapping.The platform known as Docker has become one of the most popular ways to run a new kind of software known as containerized apps. Re-mapping includes assigning a range of UIDs that function within the container (namespace) as normal UIDs from 0 to 65536 yet have no privileges on the host. Essentially, the container views the user as the root, while the host does not. This is done by user namespace remapping, re-mapping the user for that specific container to a less-privileged user on the Docker host. ![]() However, if you are running an application that requires executing with the root user, there is a way to minimize the chances of malicious activity. The best way to prevent Docker container privilege escalation is not using privileged containers at all. ![]() #RUNNING DOCKER IMAGE DOCKER FOR MAC HOW TO#How to Minimize Docker Container Privilege Escalation? The most common scenario is when a legitimate user abuses the given privilege for malicious activity. A cyberattacker could connect to the host from the container and endanger the established infrastructure and configuration. It creates opportunities for malicious users to take control of the system.Īllowing a container root access to everything on the system opens a window of opportunity for cyberattacks. Having privileged containers is a security risk for any organization. Possible Breaches Via Privileged Containers Exposing the kernel and the hardware resources of the host to any outside cyberattack is always a potential threat to the system.įor this reason, it is not recommended to use privileged containers in a production environment. Just like Ubuntu discourages using the system as root, so does Docker. ![]() Why Running Privileged Containers is Not Secure? ![]()
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