How to Obtain Detailed Pod Status Information using Client-Go?-Golang-php.cn

Home

Backend Development

Golang

How to Obtain Detailed Pod Status Information using Client-Go?

Mary-Kate Olsen

Nov 04, 2024 am 08:08 AM

How to Obtain Detailed Pod Status Information using Client-Go?

Customizing Pod Status Output Using Kubernetes Client-Go

When using the k8s.io/client-go/kubernetes client-go, it is possible to retrieve the pod.Status which includes the pod.Status.Phase. However, this information is limited to five values: Pending, Running, Succeeded, Failed, and Unknown.

If you want to get more detailed status information, such as "Init:0/1" or "PodInitializing," which are displayed in the Status column of kubectl get pods, there are a few options available.

Server-Side Calculation

Typically, you don't need to calculate the status on the client side because it's done at the server level. These statuses are calculated using the ServerPrint function, which defaults to the Kubernetes TablePrinter. The TablePrinter handles the conversion of server-returned data into a human-readable format.

The logic for calculating the Status column is handled in the codebase at:

https://github.com/kubernetes/kubernetes/tree/4477bf02f211093b32cf58f64aa42aff77daea61/pkg/printers/internalversion

Client-Side Calculation

If you still prefer to calculate the status on the client side, you can use the kubeconfig library to access the Kubernetes API server. However, this requires a deep understanding of the Kubernetes API and can be quite complex.

Using Printers

Another option is to use custom printers. The client-go library provides a number of functions for printing objects, including:

https://github.com/kubernetes/kubernetes/tree/master/staging/src/k8s.io/cli-runtime/pkg/printers

You can use these functions to create a custom printer that matches the format of kubectl get pods.

Conclusion

Retrieving the same Pod status information as kubectl get pods is possible using the client-go library. However, it's worth noting that this information is usually calculated on the server side, and you may be able to avoid the need for client-side calculation. If you do need to customize the status output, using printers is a good approach.

The above is the detailed content of How to Obtain Detailed Pod Status Information using Client-Go?. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

String Manipulation in Go: Mastering the 'strings' PackageMay 14, 2025 am 12:19 AM

Mastering the strings package in Go language can improve text processing capabilities and development efficiency. 1) Use the Contains function to check substrings, 2) Use the Index function to find the substring position, 3) Join function efficiently splice string slices, 4) Replace function to replace substrings. Be careful to avoid common errors, such as not checking for empty strings and large string operation performance issues.

Go 'strings' package tips and tricksMay 14, 2025 am 12:18 AM

You should care about the strings package in Go because it simplifies string manipulation and makes the code clearer and more efficient. 1) Use strings.Join to efficiently splice strings; 2) Use strings.Fields to divide strings by blank characters; 3) Find substring positions through strings.Index and strings.LastIndex; 4) Use strings.ReplaceAll to replace strings; 5) Use strings.Builder to efficiently splice strings; 6) Always verify input to avoid unexpected results.

'strings' Package in Go: Your Go-To for String OperationsMay 14, 2025 am 12:17 AM

ThestringspackageinGoisessentialforefficientstringmanipulation.1)Itofferssimpleyetpowerfulfunctionsfortaskslikecheckingsubstringsandjoiningstrings.2)IthandlesUnicodewell,withfunctionslikestrings.Fieldsforwhitespace-separatedvalues.3)Forperformance,st

Go bytes package vs strings package: Which should I use?May 14, 2025 am 12:12 AM

WhendecidingbetweenGo'sbytespackageandstringspackage,usebytes.Bufferforbinarydataandstrings.Builderforstringoperations.1)Usebytes.Bufferforworkingwithbyteslices,binarydata,appendingdifferentdatatypes,andwritingtoio.Writer.2)Usestrings.Builderforstrin

How to use the 'strings' package to manipulate strings in Go step by stepMay 13, 2025 am 12:12 AM

Go's strings package provides a variety of string manipulation functions. 1) Use strings.Contains to check substrings. 2) Use strings.Split to split the string into substring slices. 3) Merge strings through strings.Join. 4) Use strings.TrimSpace or strings.Trim to remove blanks or specified characters at the beginning and end of a string. 5) Replace all specified substrings with strings.ReplaceAll. 6) Use strings.HasPrefix or strings.HasSuffix to check the prefix or suffix of the string.

Go strings package: how to improve my code?May 13, 2025 am 12:10 AM

Using the Go language strings package can improve code quality. 1) Use strings.Join() to elegantly connect string arrays to avoid performance overhead. 2) Combine strings.Split() and strings.Contains() to process text and pay attention to case sensitivity issues. 3) Avoid abuse of strings.Replace() and consider using regular expressions for a large number of substitutions. 4) Use strings.Builder to improve the performance of frequently splicing strings.

What are the most useful functions in the GO bytes package?May 13, 2025 am 12:09 AM

Go's bytes package provides a variety of practical functions to handle byte slicing. 1.bytes.Contains is used to check whether the byte slice contains a specific sequence. 2.bytes.Split is used to split byte slices into smallerpieces. 3.bytes.Join is used to concatenate multiple byte slices into one. 4.bytes.TrimSpace is used to remove the front and back blanks of byte slices. 5.bytes.Equal is used to compare whether two byte slices are equal. 6.bytes.Index is used to find the starting index of sub-slices in largerslices.

Mastering Binary Data Handling with Go's 'encoding/binary' Package: A Comprehensive GuideMay 13, 2025 am 12:07 AM

Theencoding/binarypackageinGoisessentialbecauseitprovidesastandardizedwaytoreadandwritebinarydata,ensuringcross-platformcompatibilityandhandlingdifferentendianness.ItoffersfunctionslikeRead,Write,ReadUvarint,andWriteUvarintforprecisecontroloverbinary

See all articles