#Docker for mac freezes how to
#Docker for mac freezes software
#Docker for mac freezes download

If I want to save it I can redirect it to a file like so: docker run -v `pwd`:/mnt minify minify /mnt/all.css > matter if you're just getting started with docker or you're already a professional, there are situations when you can't remember the correct command or you're just confused by the order of parameters. Running this minifies the contents of the all.css file in my current directory and outputs the result to standard out. I can give it access by mounting my current directory as part of the docker run command, like so: docker run -v `pwd`:/mnt minify minify /mnt/all.css Running the command this time is a bit harder, because it needs access to files on my filesystem. Building the tool into a container used the same pattern: docker run golang go get -v /tdewolff/minify/cmd/minify I decided to use this technique to try out this Go minify tool by Taco de Wolff. Instead, I ran ipconfig getifaddr en0 to find the local network IP address of my Mac and then ran hey against that IP address ( thanks again, Stack Overflow): simonw$ docker run heyimage hey -n 100 -c 10 ''įor me, this use-case illustrates a huge part of the value of Docker: it lets you execute tools written in basically anything without having to pollute your laptop with environment junk. Running hey against didn’t work inside the container. One last puzzle: the above command worked for load testing externally hosted URLs, but I also wanted to try running it against a web server running on port 8000 on my Mac itself. Having frozen the container, we can run the command like this: docker run heyimage hey -n 10 -c 2 ''Īnd the command runs, exactly as if I’d installed it without using Docker at all. The outer docker commit command then creates a new image freezing those latest changes. The nested docker ps -lq command outputs the container ID.

#Docker for mac freezes how to

Here’s how to do that: docker commit $(docker ps -lq) heyimage We can “commit” the container to freeze it into a new image that bakes in the command. Once this command finishes, we have a container with the Go program compiled and installed in it.

#Docker for mac freezes download

If you’ve never used the container before, Docker will download everything it needs before executing the rest of the command. This runs the go get command in a new instance of the official golang container. Couldn’t be simpler.īut how to use it to run a one-off tool written in Go? This article on the official Docker blog gave me everything I needed to know.įirst step: run the go get command in a brand new Docker container, like so: docker run golang go get -v /rakyll/hey You download the installer, run it, and now docker info in a terminal will reveal a fully functioning Docker environment.

We recently switched to Docker for Mac for running our development environments at work, and having worked through various iterations of Docker over the past few years Docker for Mac offers by far the most pleasant developer experience. Rather than work through upgrading my Go environment, I decided to see if I could get this tool working using Docker for Mac. Unfortunately, I don’t have a current Go environment set up on this laptop-I have Go 1.6, but Hey calls for at least Go 1.7. Hey is a load testing utility written in Go, and the installation instructions are as follows: go get -u /rakyll/hey

Some brief Googling turned up this thread on Stack Overflow, which suggested trying hey as an alternative.

#Docker for mac freezes software

Licensed to The Apache Software Foundation, īenchmarking (be patient).SSL handshake failed (1).ġ40735278280784:error:14077438:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert internal error:/Library/Caches//Sources/libressl/libressl-1.60.1.2.1/libressl/ssl/s23_clnt.c:541: I got this SSL handshake error: simonw$ ab -n 10 -c 2 ''Ĭopyright 1996 Adam Twiss, Zeus Technology Ltd, I’m playing around with Zeit Now at the moment (see my previous entry) and decided to hit it with some traffic using Apache Bench. Running a load testing Go utility using Docker for Mac