cni | Container Network Interface - networking for Linux | Continuous Deployment library

by containernetworking Go Version: v1.1.2 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | cni Summary

cni is a Go library typically used in Devops, Continuous Deployment, Docker applications. cni has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

CNI (Container Network Interface), a Cloud Native Computing Foundation project, consists of a specification and libraries for writing plugins to configure network interfaces in Linux containers, along with a number of supported plugins. CNI concerns itself only with network connectivity of containers and removing allocated resources when the container is deleted. Because of this focus, CNI has a wide range of support and the specification is simple to implement. As well as the specification, this repository contains the Go source code of a library for integrating CNI into applications and an example command-line tool for executing CNI plugins. A separate repository contains reference plugins and a template for making new plugins. The template code makes it straight-forward to create a CNI plugin for an existing container networking project. CNI also makes a good framework for creating a new container networking project from scratch.

Support

Quality

Security

License

Reuse

Support

cni has a medium active ecosystem.

It has 4885 star(s) with 1016 fork(s). There are 220 watchers for this library.

It had no major release in the last 12 months.

There are 104 open issues and 264 have been closed. On average issues are closed in 375 days. There are 15 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of cni is v1.1.2

Quality

cni has no bugs reported.

Security

cni has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

cni is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

cni releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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cni Key Features

No Key Features are available at this moment for cni.

cni Examples and Code Snippets

No Code Snippets are available at this moment for cni.

Community Discussions

Trending Discussions on cni

Kubernetes Container runtime network not ready

Insert lines at the end of a block with ansible.builtin.lineinfile

How to enable Calico network policy on the existing AKS cluster

Laravel server side form validation, Validate field length(Size) with more than one option

why I cannot ping docker.io from the vm but I can ping google?

Kube-Proxy-Windows CrashLoopBackOff

Podman pod disappears after a few days, but process is still running and listening on a given port

Istio Installation successful but not able to deploy POD

How to see Pod logs: a container name must be specified for pod... choose one of: [wait main]

Is there a way to Prevent inter-namespace communication of pods in Kubernetes without using network policy

QUESTION

Kubernetes Container runtime network not ready

Asked 2021-Jun-11 at 20:41

I installed a Kubernetes cluster of three nodes, the control node looked ok, when I tried to join the other two nodes the status for both of is: Not Ready

On control node:

...

ANSWER

Answered 2021-Jun-11 at 20:41

After seeing whole log line entry

Source https://stackoverflow.com/questions/67902874

QUESTION

Insert lines at the end of a block with ansible.builtin.lineinfile

Asked 2021-Jun-01 at 23:41

I'm trying to add a couple of config items to the default containerd config file. Here is a snippet of the file.

...

ANSWER

Answered 2021-Jun-01 at 23:41

It appears there is no logical way of doing this yet. The best solutions seem to be either to use a template (seems to be the preferred way) or use insertbefore.

Source https://stackoverflow.com/questions/67278039

QUESTION

How to enable Calico network policy on the existing AKS cluster

Asked 2021-Jun-01 at 12:10

I want to enable Calico network policy on existing AKS cluster. Is there any way to do that?

I found the following statement on the official Microsoft documentation that, "You can't enable network policy on an existing AKS cluster. To use Azure Network Policy, you must use the Azure CNI plug-in and define your own virtual network and subnets."

But I raising this question because what if we need to implement this on the existing production level clusters??

If there is no option then for only this thing we need to do various time consuming operations on that production servers and then we have to enable policy.

Please help me on this. Thank you.

...

ANSWER

Answered 2021-May-05 at 06:47

I'm afraid you can't enable the network policy on the existing AKS cluster. It shows here:

The network policy feature can only be enabled when the cluster is created. You can't enable network policy on an existing AKS cluster.

Source https://stackoverflow.com/questions/67395933

QUESTION

Laravel server side form validation, Validate field length(Size) with more than one option

Asked 2021-May-17 at 00:03

I'm using ajax to make a server side form validation in laravel. All my validations are working fine except for one which i can figure out how to do it. Actually i have a field in my form for the ID number, which can take either 7 caracters for passport number, 9 caracters for ID card number or 20 caracters for temporary ID card number. How can i set a validation for size or lenght with 3 differents options?

...

ANSWER

Answered 2021-May-17 at 00:03

There is no standard validation rule to do this, but you can create a new custom rule.

Check out the documentantion for creating and applying custom rules here: https://laravel.com/docs/8.x/validation#custom-validation-rules

This link might not scroll down to the right place right away, make sure to look for the topic called: "Custom Validation Rules"

Source https://stackoverflow.com/questions/67562494

QUESTION

why I cannot ping docker.io from the vm but I can ping google?

Asked 2021-May-09 at 20:21

today while trying to run my pod , I discovered this error which we see in the describe events:

...

ANSWER

Answered 2021-May-09 at 20:21

Because docker.io does not respond to pings, from anywhere.

Source https://stackoverflow.com/questions/67461938

QUESTION

Kube-Proxy-Windows CrashLoopBackOff

Asked 2021-May-07 at 12:21

Installation Process

I am all new to Kubernetes and currently setting up a Kubernetes Cluster inside of Azure VMs. I want to deploy Windows containers, but in order to achieve this I need to add Windows worker nodes. I already deployed a Kubeadm cluster with 3 master nodes and one Linux worker node and those nodes work perfectly.

Once I add the Windows node all things go downward. Firstly I use Flannel as my CNI plugin and prepare the deamonset and control plane according to the Kubernetes documentation: https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/adding-windows-nodes/

Then after the installation of the Flannel deamonset, I installed the proxy and Docker EE accordingly.

Used Software Master Nodes

OS: Ubuntu 18.04 LTS
Container Runtime: Docker 20.10.5
Kubernetes version: 1.21.0
Flannel-image version: 0.14.0
Kube-proxy version: 1.21.0

Windows Worker Node

OS: Windows Server 2019 Datacenter Core
Container Runtime: Docker 20.10.4
Kubernetes version: 1.21.0
Flannel-image version: 0.13.0-nanoserver
Kube-proxy version: 1.21.0-nanoserver

Wanted Results:

I wanted to see a full cluster ready to use and with all the needed in the Running state.

Current Results:

After the installation I checked if the installation was successful:

...

ANSWER

Answered 2021-May-07 at 12:21

Are you still having this error? I managed to fix this by downgrading windows kube-proxy to at least 1.20.0. There must be some missing config or bug for 1.21.0.

Source https://stackoverflow.com/questions/67369225

QUESTION

Podman pod disappears after a few days, but process is still running and listening on a given port

Asked 2021-May-06 at 10:05

I am running an Elasticsearch container as Podman pod using podman play kube and a yaml definition of a pod. Pod is created, cluster of three nodes is created and everything works as expected. But: Podman pod dies after a few days of staying idle.

Podman podman ps command says:

...

ANSWER

Answered 2021-May-06 at 10:05

The workaround that worked for me is to add this configuration file from the Podman repository [1] under /usr/lib/tmpfiles.d/ and /etc/tmpfiles.d/, in this way we are preventing the removal of Podman temporary files from /tmp directory [2]. As stated in [3], additionally CNI leaves Network information in /var/lib/cni/networks when the system crashes or containers do not shut down properly. This behaviour has been fixed in the latest Podman release [4] and it happens when using rootless Podman.

Workaround

First, check the runRoot default directory set for your Podman rootless user:

Source https://stackoverflow.com/questions/66324225

QUESTION

Istio Installation successful but not able to deploy POD

Asked 2021-Apr-22 at 13:43

I have successfully installed Istio in k8 cluster.

Istio version is 1.9.1
Kubernetes CNI plugin used: Calico version 3.18 (Calico POD is up and running)

...

ANSWER

Answered 2021-Apr-19 at 15:30

In this case, adding hostNetwork:true under spec.template.spec to the istiod Deployment may help. This seems to be a workaround when using Calico CNI for pod networking (see: failed calling webhook "sidecar-injector.istio.io)

As we can find in the Kubernetes Host namespaces documentation:

HostNetwork - Controls whether the pod may use the node network namespace. Doing so gives the pod access to the loopback device, services listening on localhost, and could be used to snoop on network activity of other pods on the same node.

Source https://stackoverflow.com/questions/67159786

QUESTION

How to see Pod logs: a container name must be specified for pod... choose one of: [wait main]

Asked 2021-Apr-20 at 14:26

I am running an Argo workflow and getting the following error in the pod's log:

...

ANSWER

Answered 2021-Mar-17 at 19:08

This happens when you try to see logs for a pod with multiple containers and not specify for what container you want to see the log. Typical command to see logs:

Source https://stackoverflow.com/questions/66679561

QUESTION

Is there a way to Prevent inter-namespace communication of pods in Kubernetes without using network policy

Asked 2021-Apr-14 at 13:18

I am setting up hybrid cluster(master-centos and 2 worker nodes-windows 2019) with containerd as runtime. I cannot use any CNI like calico and weave as they need docker as runtime.I can use Flannel but it does not support network policies well. Is there a way to prevent inter-namespace communication of pods in Kubernetes WITHOUT using network policy?

...

ANSWER

Answered 2021-Apr-06 at 12:31

Is there a way to prevent inter-namespace communication of pods in Kubernetes WITHOUT using network policy?

Network policies was create for that exact purpose and as per documents you need CNI that supports them. In other way they will be ignored.

Network policies are implemented by the network plugin. To use network policies, you must be using a networking solution which supports NetworkPolicy. Creating a NetworkPolicy resource without a controller that implements it will have no effect.

If your only option is to use flannel for networking, you can install Calico network policy to secure cluster communications. So basically you are installing calico for policy and flannel for networking commonly known as Canal. You can find more details in calico docs

Here's also a good answer how to setup calico with containerd that you might find useful for your case.

Source https://stackoverflow.com/questions/66966003

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install cni

You can download it from GitHub.

Support

We welcome contributions, including bug reports, and code and documentation improvements. If you intend to contribute to code or documentation, please read CONTRIBUTING.md. Also see the contact section in this README.

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