While designed for web development, the PHP scripting language also provides general-purpose use. Also the docker-compose version was much faster to pick up changes, vs minutes for ansible. I don't find docker that useful for developing on a day to dat basis however, it just gets in the way and generally you're not going to need a webserver, SSL, celery, rabbitmq in development anyway. It is useful to debug things locally though.

1. Apk Install Docker Windows
2. Apk Install Docker Linux
3. Apk Install Docker Vpn
4. Docker Apk Install Python
5. Apk Install Curl Docker

As part of adding integration tests to an app on CircleCI I ran into the following issues:

• redis-cli's API has changed from Redis CLI versions 2 to 3 to 4
  • ie. this works in v4 redis-cli -u ${REDIS_URL} but doesn’t in v2
• the “only way” to install redis-cli is through a redis-tools or redis-server install and I only need the Redis CLI not the server or any other tools.

What follows is how not to install redis-cli and then how to install redis-cli latest, properly.

Table of Contents

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Bad: install outdated Redis CLI version

This installs an outdated version, 2.8.x where stable is 4.x.x.

Better: install latest Redis CLI as part of redis-server

Maybe we don’t need the full redis-server install if we only need the Redis CLI.Sometimes it also installs the old redis-cli… not the best.

Best: install just Redis CLI with redis-cli binary from tarball

You’ll need libjemalloc1 libjemalloc-dev gcc make most of which should already be installed. We’re building from source… which takes about a minute on the CircleCI containers (so I would expect less everywhere else), which is fine.

Credit: DevOps Zone, install redis-cli without installing server. I shamelessly took the snippet from there, because hey, it works.

Installing redis-cli latest on CircleCI

Same as above except:

CircleCI runs the jobs with a non-root user by default, and kudos to them for that, more tools should make you think about what privileges you have.

It does however mean that we need an extra command for the Redis CLI to be runnable.

Installing redis-cli latest on Alpine in Docker

apk seems to keep a more recent version of Redis CLI in its repositories.

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Docker Desktop provides several networking features to make it easier touse.

Features

VPN Passthrough

Docker Desktop networking can work when attached to a VPN. To do this,Docker Desktop intercepts traffic from the containers and injects it intoWindows as if it originated from the Docker application.

Port Mapping

When you run a container with the -p argument, for example:

Docker Desktop makes whatever is running on port 80 in the container (inthis case, nginx) available on port 80 of localhost. In this example, thehost and container ports are the same. What if you need to specify a differenthost port? If, for example, you already have something running on port 80 ofyour host machine, you can connect the container to a different port:

Now, connections to localhost:8000 are sent to port 80 in the container. Thesyntax for -p is HOST_PORT:CLIENT_PORT.

HTTP/HTTPS Proxy Support

See Proxies.

Known limitations, use cases, and workarounds

Apk Install Docker Windows

Following is a summary of current limitations on the Docker Desktop for Windowsnetworking stack, along with some ideas for workarounds.

There is no docker0 bridge on Windows

Because of the way networking is implemented in Docker Desktop for Windows, you cannotsee a docker0 interface on the host. This interface is actually within thevirtual machine.

Apk Install Docker Linux

I cannot ping my containers

Docker Desktop for Windows can’t route traffic to Linux containers. However, you canping the Windows containers.

Per-container IP addressing is not possible

The docker (Linux) bridge network is not reachable from the Windows host.However, it works with Windows containers.

Use cases and workarounds

There are two scenarios that the above limitations affect:

I want to connect from a container to a service on the host

The host has a changing IP address (or none if you have no network access). We recommend that you connect to the special DNS namehost.docker.internal which resolves to the internal IP address used by thehost. This is for development purpose and will not work in a production environment outside of Docker Desktop for Windows.

You can also reach the gateway using gateway.docker.internal.

If you have installed Python on your machine, use the following instructions as an example to connect from a container to a service on the host:

1. Run the following command to start a simple HTTP server on port 8000.

   python -m http.server 8000

   If you have installed Python 2.x, run python -m SimpleHTTPServer 8000.

2. Now, run a container, install curl, and try to connect to the host using the following commands:

I want to connect to a container from Windows

Apk Install Docker Vpn

Port forwarding works for localhost; --publish, -p, or -P all work.Ports exposed from Linux are forwarded to the host.

Our current recommendation is to publish a port, or to connect from anothercontainer. This is what you need to do even on Linux if the container is on anoverlay network, not a bridge network, as these are not routed.

The command to run the nginx webserver shown in Getting Startedis an example of this.

To clarify the syntax, the following two commands both publish container’s port 80 to host’s port 8000:

Docker Apk Install Python

To publish all ports, use the -P flag. For example, the following commandstarts a container (in detached mode) and the -P flag publishes all exposed ports of thecontainer to random ports on the host.

Apk Install Curl Docker

See the run command for more details onpublish options used with docker run.

windows, networking