From bb903760a54b233b58f40a56d2973deb4bda48c0 Mon Sep 17 00:00:00 2001 From: darksun Date: Fri, 2 Nov 2018 12:49:23 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=20KRS:=20A=20new=20tool=20f?= =?UTF-8?q?or=20gathering=20Kubernetes=20resource=20statistics?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...athering Kubernetes resource statistics.md | 75 +++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 sources/tech/20181101 KRS- A new tool for gathering Kubernetes resource statistics.md diff --git a/sources/tech/20181101 KRS- A new tool for gathering Kubernetes resource statistics.md b/sources/tech/20181101 KRS- A new tool for gathering Kubernetes resource statistics.md new file mode 100644 index 0000000000..7244e42ab0 --- /dev/null +++ b/sources/tech/20181101 KRS- A new tool for gathering Kubernetes resource statistics.md @@ -0,0 +1,75 @@ +KRS: A new tool for gathering Kubernetes resource statistics +====== +Zero-configuration tool simplifies gathering information, such as how many pods are running in a certain namespace. +![](https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/tools_hardware_purple.png?itok=3NdVoYhl) + +Recently I was in New York giving a talk at O'Reilly Velocity on the topic of [troubleshooting Kubernetes apps][1] and, motivated by the positive feedback and great discussions on the topic, I decided to revisit tooling in the space. It turns out that, besides [kubernetes-incubator/spartakus][2] and [kubernetes/kube-state-metrics][3], we don't really have much lightweight tooling available to collect resource stats (such as the number of pods or services in a namespace). So, I sat down on my way home and started coding on a little tool—creatively named **krs** , which is short for Kubernetes Resource Stats—that allows you to gather these stats. + +You can use [mhausenblas/krs][5] in two ways: + + * directly from the command line (binaries for Linux, Windows, and MacOS are available); and + * in cluster, as a deployment, using the [launch.sh][4] script, which creates the appropriate role-based access control (RBAC) permissions on the fly. + + + +Mind you, it's very early days, and this is heavily a work in progress. However, the 0.1 release of **krs** offers the following features: + + * In a per-namespace basis, it periodically gathers resource stats (supporting pods, deployments, and services). + * It exposes these stats as metrics in the [OpenMetrics format][6]. + * It can be used directly via binaries or in a containerized setup with all dependencies included. + + + +In its current form, you need to have **kubectl** installed and configured for **krs** to work, because **krs** relies on a **kubectl get all** command to be executed to gather the stats. (On the other hand, who's using Kubernetes and doesn't have **kubectl** installed?) + +Using **krs** is simple; [Download][7] the binary for your platform and execute it like this: + +``` +$ krs thenamespacetowatch +# HELP pods Number of pods in any state, for example running +# TYPE pods gauge +pods{namespace="thenamespacetowatch"} 13 +# HELP deployments Number of deployments +# TYPE deployments gauge +deployments{namespace="thenamespacetowatch"} 6 +# HELP services Number of services +# TYPE services gauge +services{namespace="thenamespacetowatch"} 4 +``` + +This will launch **krs** in the foreground, gathering resource stats from the namespace **thenamespacetowatch** and outputting them respectively in the OpenMetrics format on **stdout** for you to further process. + +![krs screenshot][9] + +Screenshot of krs in action. + +But Michael, you may ask, why isn't it doing something useful (such as storing 'em in S3) with the metrics? Because [Unix philosophy][10]. + +For those wondering if they can directly use Prometheus or [kubernetes/kube-state-metrics][3] for this task: Well, sure you can, why not? The emphasis of **krs** is on being a lightweight and easy-to-use alternative to already available tooling—and maybe even being slightly complementary in certain aspects. + +This was originally published on [Medium's ITNext][11] and is reprinted with permission. + +-------------------------------------------------------------------------------- + +via: https://opensource.com/article/18/11/kubernetes-resource-statistics + +作者：[Michael Hausenblas][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://opensource.com/users/mhausenblas +[b]: https://github.com/lujun9972 +[1]: http://troubleshooting.kubernetes.sh/ +[2]: https://github.com/kubernetes-incubator/spartakus +[3]: https://github.com/kubernetes/kube-state-metrics +[4]: https://github.com/mhausenblas/krs/blob/master/launch.sh +[5]: https://github.com/mhausenblas/krs +[6]: https://openmetrics.io/ +[7]: https://github.com/mhausenblas/krs/releases +[8]: /file/412706 +[9]: https://opensource.com/sites/default/files/uploads/krs_screenshot.png (krs screenshot) +[10]: http://harmful.cat-v.org/cat-v/ +[11]: https://itnext.io/kubernetes-resource-statistics-e8247f92b45c