https://github.com/electron0zero/docker-intro
Playing around with docker
https://github.com/electron0zero/docker-intro
Last synced: about 1 year ago
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Playing around with docker
- Host: GitHub
- URL: https://github.com/electron0zero/docker-intro
- Owner: electron0zero
- Created: 2017-04-25T09:18:23.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2017-04-26T04:23:48.000Z (about 9 years ago)
- Last Synced: 2025-02-09T05:14:36.449Z (over 1 year ago)
- Language: Python
- Size: 5.86 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
Awesome Lists containing this project
README
# Docker Intro
This repo have files for [Docker Get Started](https://docs.docker.com/get-started/).
Visit [https://docs.docker.com/get-started/](https://docs.docker.com/get-started/) to get an idea if you don't know about docker
Docker Image of this tutorial is available at Docker Hub \
[electron0zero/docker-intro](https://hub.docker.com/r/electron0zero/docker-intro/)
## Few gotchas/ Things to keep in mind
- On Windows when you use docker using [docker-toolbox](https://www.docker.com/products/docker-toolbox), it runs it on a VirtualBox VM, Which results in ip of VM as address on which you listen, not on localhost.
- Use [Kitematic](https://kitematic.com/) to figure out this IP
- If you are deploying real applications from windows,Then do not ignore warnings about permission and **make sure you have some mechanism to set appropriate permissions**
*Here is Warning Message*
> SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
## Basic Commands
**Command:** `docker version`
**Output:**
```
Client:
Version: 17.03.1-ce
API version: 1.27
Go version: go1.7.5
Git commit: c6d412e
Built: Tue Mar 28 00:40:02 2017
OS/Arch: windows/amd64
Server:
Version: 17.04.0-ce
API version: 1.28 (minimum version 1.12)
Go version: go1.7.5
Git commit: 4845c56
Built: Wed Apr 5 18:45:47 2017
OS/Arch: linux/amd64
Experimental: false
```
**Explanation:** Self explained imo
---
**Command:** `docker build -t docker-intro .`
**Output:** output of executing Dockerfile and info about image
**Explanation:** Builds image named `docker-intro` from `.` (current dir) \
[*assuming it have a Dockerfile in it**]
---
**Command:** `docker images`
**Output:**
```
REPOSITORY TAG IMAGE ID CREATED SIZE
docker-intro latest 58274ed93000 4 minutes ago 194 MB
python 2.7-slim 4a323b466a5a 3 hours ago 182 MB
```
**Explanation:** list docker images
---
**Command:** `docker run -p 4000:80 docker-intro`
**Output:**
```
* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
```
*This output is from app, running in container.\
Not local system so will not be available that IP, It will be available on mapped port on VM's IP*
- Use [Kitematic](https://kitematic.com/) to figure out ip on which you can access it.
**Explanation:** run docker image `docker-intro` and `-p` flag is used port mapping, here port `4000` of system running docker(host) is mapped to port `80` of container.
---
**Command:** `docker run -d -p 4000:80 docker-intro`
**Output:**
```
1b7d07adb936265a857da1b318e82b29e1bd15ef3f874239f7384948368f5829
```
**Explanation:** run in detached mode
>if you have issue saying `failed: port is already allocated`.
> It means you have an container running on that port, you can resolve it by killing/stopping that running container or changing it to a free port
*use `docker stop `, container id can be found by running `docker ps -a`*
Sample Output of `docker ps -a`
```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1b7d07adb936 docker-intro "python app.py" 2 minutes ago Up 2 minutes 0.0.0.0:4000->80/tcp kind_dijkstra
24146a2050a1 docker-intro "python app.py" 4 minutes ago Created unruffled_varahamihira
432528f53e40 docker-intro "python app.py" 9 minutes ago Exited (137) 3 minutes ago kind_haibt
```
### You can use [Docker Hub](http://hub.docker.com/) to share you images, it is like github for docker images.
*I am not going into this, it is fully described in docker docs*
### Final Thought
Docker has more stuff then i described, it is just the gist of it. \
See multi-part [getting-started guide](https://docs.docker.com/get-started/) to learn more