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Questions tagged [flannel]

flannel (originally rudder) is an etcd backed network fabric for containers, an overlay network that gives a subnet to each machine for use with Kubernetes

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packet capture for communication between 2 pods on K8 cluster

I am testing K8 cluster setup and trying to understand the networking between 2 pods. The K8 is using the flannel as its CNI. The communication is happening correctly, but i would like to analyze a bit on the packet flow. I tried to capture the…
Prashant
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What are the port mapping complexities solved by Flannel?

Suppose, I have 3 Containers running on a single host and we are making a Hadoop cluster, 1 is master and other 2 are slaves(Namenode and datanodes) And,we need to map ports: docker run -itd -p 50070:50070 --name master centos:bigdata docker run…
paresh494
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how to use docker run in kubernetes cluster with flannel network

i have a kubernetes cluster with flannel. It works fine. But when i start a container with docker run command, the container cannot reach outside. $ docker run --rm -ti centos:7.3.1611 bash [root@d8a7d18b312a /]# ping 10.33.46.2 10.33.46.2 is…
kaven
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docker flannel subnet issues

Docker not picking up flannel subnet. Any help will be greatful. I am using coreos as my container Linux and docker version is 1.12.6 my docker startup file look like below. Flannel is working as expected [Unit] Description=Docker…
user3585106
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In k8s environment build with virtualbox, nodes in flannel network can't ping each other

Env info: I build my k8s cluster with virtualbox on mac.The node os is centos7.3. There are two node and one master, all of which's network is Net(can visit the public network) and Host-Only (can visit the inner network).The IP info is…
liyj144
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Kuberetes V1.6.2 flannel not running on master node

I am running 2 node cluster using vagrant, configured with kubeadm command. When I setup the cluster flannel was running on all three nodes. Now i don't see flannel running in master node. because of this overlay network is not working from master…
sfgroups
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Kubernetes flannel etcd not upading

I am have configured kubernetes 1.6.2 in centos 7, 3 node cluster. when I deploy the pods I get the uniq ip address for each pod. also I see network ineterface created docker0, flannel.1 and cni0 created. But when I query etcd I didn't see any…
sfgroups
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What are implications of choosing network /16 vs /12 when setting up Flannel and service IPs for Kubernetes?

I'm in the process of setting up a Kubernetes cluster from scratch. I am looking to install Flannel as part of the installation process. When I look at online guides/examples I can see that it is necessary to configure the Flannel subnetwork. I…
John
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why CNI conf file name has number as prefix

I am trying to create a CNI conf file.why CNI conf file name has number as prefix? For e.g "10-calico.conf" "10-weave.conf" "10-Flannel.conf". Is there a convetion to follow?
Murali-Reddy
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How to make host interfaces, including cni* accessible in kubernetes privileged pods?

We would like see traffic from other interfaces on the host, but noticed that they are not visible in the kubernetes pods. Is there an option that can be configured in the yaml file to make the interface(s) visible in the pods which are running in…
Ajit Sarnaik
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Kubernetes Networking connect local/container

I'm a Developer going up the learning curve to become more DevOps. I'm building a Kubernetes cluster. I'd like to be able to 'directly' connect to pods. I don't want to be load balanced through a Service, I want to be able to connect to individual…
losty
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Does the kube-apiserver expect the presence of kube-proxy?

I've been running my kubernetes masters separate from my kubernetes nodes. So I have kube-apiserver, kube-scheduler and kube-controllermanager running on a server without kubelet, kube-proxy or flannel. So far this has worked perfectly. However,…
Andy Smith
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Flannel-Wrapper unable to resolve UUID: no such file

After installing coreos (stable, beta or alpha) I can't start flanneld.service because of the dependency flannel-docker-opts.service fails. It's giving an error about rm: unable to resolve the UUID from file: open …
Grvmm
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How to define a DaemonSet to create slightly different pods?

How can I define a single definition of DaemonSet to create slightly different pods from it? What I mean by different pods is that pods created from different commands. I currently make two different DaemonSet objects to create two different kinds…
eastcirclek
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Can not access Cluster Ip with same Node

I'm Deploying a k8s cluster on CentOS with version of v1.5.1 Having three nodes: kube-01(master) kube-02 kube-03 Having a deployment with one pod, named Deployment-A with a pod ip Pod-A-IP, deployed on kube-03 Having a deployment with two pods,…
Lawliet
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