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This article mainly explains "how to cooperate with Istio and OpenStack and Kubernetes". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to cooperate with Istio and OpenStack and Kubernetes".

In any case, containers will only grow in popularity.

Olaph Wagoner cited one of the findings in his discussion of microservices:

Container revenue will reach $3.5 billion in 2021 and is expected to be $1.5 billion in 2018.

Waggoner, a software engineer and developer at IBM, is optimistic about containers. In OpenInfra Days Vietnam's presentation, he outlined microservices, Kubernetes, and Istio.

Tricks?

There is no consensus in the industry on the nature of microservices, but the defined features include independent deployment and ease of replacement, he said.

It is controversial whether these services are actually very small. "if you have a hello world app, it may be considered small if all it does is print to the console." He explained. "the database server that runs the entire application can still be seen as a microservice, but I don't think anyone will think it's small."

K8S

Kubernetes defines itself as a portable, extensible, open source platform for managing containerized workloads and services for declarative configuration and automation. "in short, it's a way to manage a bunch of containers or services, whatever you want," he said.

Good meshing

Istio is an open source service grid that can be transparently layered into existing distributed applications, allowing you to connect, protect, control, and observe services. The last definition: a service grid is a micro-service network that makes up these distributed applications and their interactions.

What does this mean for users?

"Istio extends everything you can do with a Kubernetes cluster. For example: automatic load balancing of HTTP, gRPC, WebSocket and TCP traffic; fine-grained control of traffic behavior through rich routing rules, retry, failover and fault injection; pluggable policy layer and configuration API to support access control, rate limit and quota; secure service-to-service authentication with strong identity assertions among services in the cluster.

"the coolest things are indicators, logs and traces. All of a sudden, you can read the log as you like and know exactly which services are communicating with each other, how many times they have communicated, and so on."

Istio

The main components of Istio are: Envoy, Pilot, Citidel (istio-auth), Mixer.

Go deep into the details

Wagoner details how Istio works with OpenStack and why it's worth it.

Once you have used Kubernetes and installed Istio,K8s administrators on it, you can use OpenStack API to create a cluster. K8s users in OpenStack can only use clusters without seeing all the API that is doing heavy work behind the scenes. Now, all of this is possible because of what Kubernetes OpenStack cloud providers are doing. "Kubernetes services sometimes need something from the underlying cloud, services, endpoints, and so on. That's the goal." Ingress (part of Mixer) is a good example, which relies on OpenStack Cloud Provider for load balancing and adding end points.

"this is my favorite part, why you want OpenStack to run Kubernetes (the idea of grid extension) first. You have your cloud, you have run Kubernetes on your OpenStack cloud, and it will tell you what the cluster is doing. You can expand the service grid to include not only virtual machines in the OpenStack cloud, but also bare metal instances."

Thank you for your reading, the above is the content of "how to cooperate with Istio and OpenStack and Kubernetes". After the study of this article, I believe you have a deeper understanding of how Istio and OpenStack and Kubernetes cooperate, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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