kop | Kafka-on-Pulsar - A protocol handler that brings native Kafka protocol to Apache Pulsar | Pub Sub library
kandi X-RAY | kop Summary
kandi X-RAY | kop Summary
KoP (Kafka on Pulsar) brings the native Apache Kafka protocol support to Apache Pulsar by introducing a Kafka protocol handler on Pulsar brokers. By adding the KoP protocol handler to your existing Pulsar cluster, you can migrate your existing Kafka applications and services to Pulsar without modifying the code. This enables Kafka applications to leverage Pulsar’s powerful features, such as:. KoP, implemented as a Pulsar protocol handler plugin with the protocol name "kafka", is loaded when Pulsar broker starts. It helps reduce the barriers for people adopting Pulsar to achieve their business success by providing a native Kafka protocol support on Apache Pulsar. By integrating the two popular event streaming ecosystems, KoP unlocks new use cases. You can leverage advantages from each ecosystem and build a truly unified event streaming platform with Apache Pulsar to accelerate the development of real-time applications and services. KoP implements the Kafka wire protocol on Pulsar by leveraging the existing components (such as topic discovery, the distributed log library - ManagedLedger, cursors and so on) that Pulsar already has. The following figure illustrates how the Kafka-on-Pulsar protocol handler is implemented within Pulsar.
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Top functions reviewed by kandi - BETA
- Handles the request .
- Safelyloads the next metadata message from a group .
- Safe join group .
- Handle SASL authentication token .
- Decode packet to Kafka records .
- Handles a set of entries .
- Handles a producer request .
- Completes the state transition to the persistent state .
- Handles offsetFetch request .
- Helper method to check if we should abort or retry or not .
kop Key Features
kop Examples and Code Snippets
Community Discussions
Trending Discussions on kop
QUESTION
I'm spawning a kube cluster with KOPS. All works fine until I added feature gate SupportPodPidsLimit to kubelet:
kubelet:
featureGates:
SupportPodPidsLimit: "true"
Master node syslog shows: Failed to set feature gates from initial flags-based config" err="unrecognized feature gate: SupportPodPidsLimit
I haven't found in KOPS or Kube docs what and why feature gates can be unknown. Kube docs say SupportPodPidsLimit exists since 1.20.0 in GA. I'm using 1.23.0
Expecting to set podPidsLimit
...ANSWER
Answered 2022-Apr-04 at 09:48Have a look at the list of feature gates When the gate is GA, it is enabled by default and removed. Since you are using 1.23, the feature gate does indeed no longer exist.
QUESTION
Basically, I had installed Prometheues-Grafana from the kube-prometheus-stack using the provided helm chart repo prometheus-community
...ANSWER
Answered 2022-Feb-24 at 15:46It's not enough to simply install them, you need to integrate prometheus with thanos.
Below I'll describe all steps you need to perform to get the result.
First short theory. The most common approach to integrate them is to use thanos sidecar container for prometheus pod. You can read more here.
How this is done:
(considering that installation is clean, it can be easily deleted and reinstalled from the scratch).
- Get
thanos sidecaradded to theprometheuspod.
Pull kube-prometheus-stack chart:
QUESTION
I'm having to build a demo Kubernetes cluster in AWS using Kubeadm.
Unfortunately, for several reasons, Kops, and EKS are out of the question in my current environment.
How do I deal with things such as auto-scaling and auto joining worker nodes back to the master if they get terminated for any reason? This is my main concern.
I've done this with Kops in the past and it's relatively straightforward, but I'm not sure how to manage using Kubeadm.
...ANSWER
Answered 2022-Feb-12 at 21:13If you're using Ansible, you can set up your launch configuration to pull a git repo, and run a playbook to extract the join token from the Master and run on the worker nodes.
QUESTION
Does anybody know when creating InstanceGroup using kops, why we set both machineType and mixedInstancesPolicy? Does machineType means kops will pick machineType by default but if no instance with machineType available it will pick one of the types from mixedInstancesPolicy?
The spec: https://kops.sigs.k8s.io/instance_groups/ shows: "A Mixed Instances Policy utilizing EC2 Spot and the capacity-optimized allocation strategy allows an EC2 Autoscaling Group to select the instance types with the highest capacity. This reduces the chance of a spot interruption on your instance group."
the spec does not show what machineType is and what is the difference of machineType and mixedInstancesPolicy.
ANSWER
Answered 2022-Feb-19 at 19:18mixedInstancesPolicy is as described above. machineType is used if you do want one specific instance type.
There is a bit of terminology mix-up there. But you can see machineType as the same as instanceType.
If both are set, mixedInstancesPolicy is the on that will be used. However, machineType must is still validated and must e.g match the architecture of the instances in mixedInstancesPolicy.
QUESTION
I've recently started using KOPS as a tool to provision Kubernetes clusters and from what I've seen so far, it stores it's CA key and certificates in its S3 bucket, which is fine.
But out curiosity, would it be possible to store these in Hashicorp Vault instead, as opposed to s3?
...ANSWER
Answered 2022-Feb-03 at 12:35But out curiosity, would it be possible to store these in Hashicorp Vault instead, as opposed to s3?
Yes. User Matt Schuchard has mentioned in the comment:
Yes you can store them in the KV2 secrets engine, or use the PKI secrets engine to generate them instead.
For more details look at this kops documentation. The most interesting part should be Node authentication and configuration:
The vault store uses IAM auth to authenticate against the vault server and expects the vault auth plugin to be mounted on
/aws.Instructions for configuring your vault server to accept IAM authentication are at https://learn.hashicorp.com/vault/identity-access-management/iam-authentication
To configure kOps to use the Vault store, add this to the cluster spec:
QUESTION
I have created a k8s cluster with kops (1.21.4) on AWS and as per the docs on autoscaler. I have done the required changes to my cluster but when the cluster starts, the cluster-autoscaler pod is unable to schedule on any node. When I describe the pod, I see the following:
...ANSWER
Answered 2022-Jan-07 at 04:12You need to check the pod/deployment for nodeSelector property. Make sure that your desired nodes have this label.
Also, if you want to schedule pods on the master node, you must remove the taint first
QUESTION
This is really annoying me and I can't seem to find any answers on the internet.
I created a cluster using kops on AWS yesterday and everything worked fine. But for some reason (and this is like the 5th time it happens), I come back 1 or 2 days after and simply cannot access the cluster. All the other times my solution was to delete everything manually and create the cluster again.
Here's my kubectl client version
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.3", GitCommit:"c92036820499fedefec0f847e2054d824aea6cd1", GitTreeState:"clean", BuildDate:"2021-10-27T18:41:28Z", GoVersion:"go1.16.9", Compiler:"gc", Platform:"linux/amd64"}
Here's what I tried:
kubectl get nodes/pods/services/etc -v 7
ANSWER
Answered 2021-Nov-17 at 09:27For future reference, the problem is that I was using small, burstable instances both for master and nodes. Those didn't meet the hardware requirements for K8S.
QUESTION
I've used the Bitnami Helm chart to install SCDF into a k8s cluster generated by kOps in AWS.
I'm trying to add my development SCDF stream apps into the installation using a file URI and cannot figure-out where or how the shared Skipper & Server mount point is. exec'ing into either instance there is no /home/cnb and I'm not seeing anything common via mount. The best I can tell the Bitnami installation is using the MariaDB instance for shared "storage".
Is there a recommended way of installing local/dev Stream apps into the cluster?
...ANSWER
Answered 2021-Aug-23 at 09:03There are a couple of parameters under the deployer section that allows you to mount volumes (link):
QUESTION
I want to create cluster on gcp using kops.
For this, first I created gcs bucket. Then exported value for KOPS_STATE_STORE as
...ANSWER
Answered 2021-Aug-24 at 10:58I tried replicating using doc and was thrown a similar error when using the command kops validate cluster --wait 10m.
But the error after TLS timeout error was “unexpected error during validation: error listing nodes: Unauthorized” .
I then stopped the command and was able to resolve this error with the help of a solution from this stack post and now when I run kops validate cluster I get the expected output.
QUESTION
I am trying to implement some of the CIS security benchmark advices to kubernetes version 1.21.4 via kOps(1.21.0) for a self hosted Kubernetes on aws.
However when i try protectKernelDefaults:true in kubelet config and EventRateLimit adminssion plugin kube api server config, the k8s cluster fails to come up. I am trying bring up a new cluster with these settings not trying to update any existing ones.
kops cluster yaml that i am trying to use is
...ANSWER
Answered 2021-Aug-23 at 17:02The issue with default kernel settings was a bug in kOps. The installed did not set the sysctl settings that kubelet expects.
The issue with the admission controller is simply a missing admission controller configuration file.
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