Tag: kubernetes

Cannot validate certificate for ip because it doesn't contain any IP SANs

I have installed OpenShift3 with Docker and Kubernetes with the ansible installer. After the installation I want to create my docker registration on my master but I get the following error (I read it was something with SSL but I can’t find a solution): commands (from the sample): [root@ip-10-0-0-x centos]# export CURL_CA_BUNDLE=`pwd`/openshift.local.config/master/ca.crt [root@ip-10-0-0-x centos]# sudo […]

replication controller in docker swarm world

In kubernetes we got this replication controller which takes care of maintaining specified number of pods running in a given cluster. What is equivalent in docker-swarm world, do we have any? There is container restart option, does it work if one machine in the cluster goes down.

internal infrastructure with docker

i’ve a small company-network with following services/servers: jenkins stash (atlassian) confluence (atlassian) ldap owncloud zabbix (monitoring) puppet and some java-web-apps all running in separate kvm(libvirt)-vms in separate virtual-subnets on 2 machines (1 internal, 1 hetzner-rootserver) with shorewall inbetween. i’m thinking about switching to docker. but there are 2 questions to me: how can i achieve […]

Can't get Pod info in the kubernetes cluster

Following instructions in the book of “Kubernetes Cookbook”, I create a docker cluster with one master and two nodes: master: etcd, flannel, kube-apiserver, kube-controller-manager, kube-scheduler minion: etcd, flannel, kubelet, kube-proxy minion1: minion2: OS version is: [user1@iZu1ndxa4itZ ~]$ lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.2.1511 (Core) Release: […]

kubernetes error : skipping pod synchronization

i have configured kubernetes master on centos 7 and kubernetes node on another node centos 7 services running on kube master: kube-controller-manager kube-apiserver kube-scheduler etcd flanneld service running on kube node: flanneld docker kube-proxy kubelet all services are up and running and i could see the api url successfully getting all endpoints. http://kube-master:8080 however, when […]

import mysql data to kubernetes pod

Does anyone know how to import the data inside my dump.sql file to a kubernetes pod either; Directly,same way as you dealing with docker containers: docker exec -i container_name mysql -uroot –password=secret database < Dump.sql Or using the data stored in an existing docker container volume and pass it to the pod .

Connection refused with kubectl on EC2 ubuntu instance?

I installed docker-go-kubernetes on an ubuntu EC2 AWS instance using this guide: http://kubernetes.io/docs/getting-started-guides/aws/ I have kubectl installed but when I run a test: kubectl run my-nginx –image=nginx –replicas=2 –port=80 I receive and error: The connection to the server localhost:8080 was refused – did you specify the right host or port? How do I specify the […]

Kubernetes multinode setup cannot remove docker0 interface

I setup Kubernetes in multinode mode in Ubuntu 14.04 LTS with docker 1.7.1 by following this Guide: http://kubernetes.io/docs/getting-started-guides/docker-multinode/master/ The guide told to Remove the existing Docker bridge by sudo /sbin/ifconfig docker0 down and sudo brctl delbr docker0 everything is good until I restart the host machine (ubuntu), the docker0 interface is recreated after restart and […]

How to run mongo in kubernetes with authentication

I am new to kubernetes. In docker I can use the official mongo image and run docker run –name some-mongo -d mongo –auth And then connect to it and create a default db user. How can I pass –auth in a kube controller spec? Replication Controller # db-controller.yml apiVersion: v1 kind: ReplicationController metadata: labels: name: […]

Kubernetes: Multiple Services/Replication Controllers

We’re looking for direction on how to set up services and replication controllers for multiple microservices. I see a lot of examples on the internet that demonstrate a single service; I’m not sure how to configure each service separately. Are there examples out there that anyone can point to?

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