


docker container selects different network despite never setting any network
In Docker, we can provide network connections for containers by selecting different networks. Surprisingly, Docker still assigns a default network to the container even though we never set any network explicitly. This problem bothers many developers as they may encounter some problems related to network configuration. In this article, we will explain in detail why Docker containers have default networks and how to choose between different networks with the help of PHP editor Youzi.
Question content
I'm having trouble setting up the docker configuration for the go service. Here is an overview of my setup
go_binary( name = "main_arm64", embed = [":server_lib"], goarch = "arm64", goos = "linux", visibility = ["//visibility:public"], ) container_image( name = "ww_server_image", base = "@go_image_static_arm64//image", entrypoint = ["/main_arm64"], files = [":main_arm64"], ports = [ "8080", "3306", ], )
I have a graphql playgroud (http) running on http://localhost:8080
and although the port is supposedly exposed, I cannot access the playground ui.
What I want to do is:
- Be able to access the graphql playground and any other api running on other ports within the container
- Be able to make requests from my dockerized go app to separate mysql containers (I don't know how to put them on the same network as
rules_docker
). -
docker exec -it ... /bin/bash
into my docker container (this doesn't work because bash is not installed, but I don't know how to install bash via this container_image command) The error is as follows:
oci runtime exec failed: exec failed: unable to start container process: exec: "bash": executable file not found in $path: unknown
If I get the generated docker image id and run docker run -p 8080:8080 image_id
, I can access the graphql playground but cannot communicate with the mysql container
If I change the network as follows: docker run --network=host -p 8080:8080 image_id
The dockerized go application can successfully communicate with the mysql container, but then the graphql playground becomes inaccessible. The graphql playground is only accessible if I maintain --network=bridge
. I'm not sure why mysql doesn't use bridge
either, since I never specified the network when starting it. This is how I got the mysql container
docker run -p 3306:3306 --name my-db -e MYSQL_ROOT_PASSWORD=testing -d mysql:8.0.31
Solution
The answer is here: Unable to connect to mysql server using go and docker - dial-up tcp 127.0.0.1:3306: connect: connection refused
It turns out I need to actually access mysql using the following address because docker on mac uses a linux vm:
docker.for.mac.localhost:3306
The above is the detailed content of docker container selects different network despite never setting any network. For more information, please follow other related articles on the PHP Chinese website!

Golangisidealforperformance-criticalapplicationsandconcurrentprogramming,whilePythonexcelsindatascience,rapidprototyping,andversatility.1)Forhigh-performanceneeds,chooseGolangduetoitsefficiencyandconcurrencyfeatures.2)Fordata-drivenprojects,Pythonisp

Golang achieves efficient concurrency through goroutine and channel: 1.goroutine is a lightweight thread, started with the go keyword; 2.channel is used for secure communication between goroutines to avoid race conditions; 3. The usage example shows basic and advanced usage; 4. Common errors include deadlocks and data competition, which can be detected by gorun-race; 5. Performance optimization suggests reducing the use of channel, reasonably setting the number of goroutines, and using sync.Pool to manage memory.

Golang is more suitable for system programming and high concurrency applications, while Python is more suitable for data science and rapid development. 1) Golang is developed by Google, statically typing, emphasizing simplicity and efficiency, and is suitable for high concurrency scenarios. 2) Python is created by Guidovan Rossum, dynamically typed, concise syntax, wide application, suitable for beginners and data processing.

Golang is better than Python in terms of performance and scalability. 1) Golang's compilation-type characteristics and efficient concurrency model make it perform well in high concurrency scenarios. 2) Python, as an interpreted language, executes slowly, but can optimize performance through tools such as Cython.

Go language has unique advantages in concurrent programming, performance, learning curve, etc.: 1. Concurrent programming is realized through goroutine and channel, which is lightweight and efficient. 2. The compilation speed is fast and the operation performance is close to that of C language. 3. The grammar is concise, the learning curve is smooth, and the ecosystem is rich.

The main differences between Golang and Python are concurrency models, type systems, performance and execution speed. 1. Golang uses the CSP model, which is suitable for high concurrent tasks; Python relies on multi-threading and GIL, which is suitable for I/O-intensive tasks. 2. Golang is a static type, and Python is a dynamic type. 3. Golang compiled language execution speed is fast, and Python interpreted language development is fast.

Golang is usually slower than C, but Golang has more advantages in concurrent programming and development efficiency: 1) Golang's garbage collection and concurrency model makes it perform well in high concurrency scenarios; 2) C obtains higher performance through manual memory management and hardware optimization, but has higher development complexity.

Golang is widely used in cloud computing and DevOps, and its advantages lie in simplicity, efficiency and concurrent programming capabilities. 1) In cloud computing, Golang efficiently handles concurrent requests through goroutine and channel mechanisms. 2) In DevOps, Golang's fast compilation and cross-platform features make it the first choice for automation tools.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Dreamweaver CS6
Visual web development tools