Author: debasis maity

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April 16, 2018

DOCKER CONCEPT FOR DBA – PART 7 Pull docker image from repository

Docker hub is repository of images for Community Edition. 1.Checking docker images available in server [root@debasiseric3 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE 2.Let me try to pull a demo project [root@debasiseric3 ~]# docker pull hello-world Using default tag: latest latest: Pulling from library/hello-world 9bb5a5d4561a: Pull complete Digest: sha256:f5233545e43561214ca4891fd1157e1c3c563316ed8e237750d59bde73361e77 Status: Downloaded newer image for hello-world:latest 3.Let me check […]

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April 13, 2018

DOCKER CONCEPT FOR DBA – PART 6 Installation of docker UCP

This document will explain docker UCP for Enterprise grade cluster management What is Docker UCP Docker Universal Control Plane (UCP) is the enterprise-grade cluster management solution from Docker. You install it on-premises or in your virtual private cloud, and it helps you manage your Docker swarm and applications through a single interface. Universal Control Plane is a containerized application that […]

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April 13, 2018

Oracle DBaaS 1z0-160 part 2:-How to subscribe to Oracle cloud free

Register for free subscriptions 1.Please type url to your favorite browser https://cloud.oracle.com/home 2.Click on green button 3.Please click on “Create a Free Account” 4.Please fill all details along with your credit card information   Note:-Please select among following region(Default Data Region).If you select EMEA or NA you will get more options like RAC with Dataguard options.   5.You will get […]

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April 13, 2018

Oracle DBaaS 1z0-160 part 1:-Oracle DBaaS cloud services overview

Oracle DBaaS cloud services overview A.Oracle DBaaS cloud services level A.1 The Oracle Database Cloud Service – Virtual Image —You have to install this software yourself, and you are responsible for all maintenance operations for this software. You have root privilege, so you can load and run software in the compute environment. You have full administrative privileges for the Oracle […]

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April 13, 2018

KBHS-00712: ORA-29024 received from local HTTP service during backup in RAC Oracle cloud

KBHS-00712: ORA-29024 received from local HTTP service during backup in RAC Oracle cloud The backup of Oracle RAC DBaaS may fail during manual as well automatic backup. If you manually invoke following command,The backup may not get successful. Login to opc. [opc@pocracdemo1 ~]$ raccli describe job 17 {   “requestStatus” : “SUCCESS”,   “jobStatus” : “FAILURE”,   “message” : “Failed […]

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April 9, 2018

DOCKER CONCEPT FOR DBA -PART 3 device mapper for Dcoker

DOCKER Use the Device Mapper storage driver Device Mapper is a kernel-based framework that underpins many advanced volume management technologies on Linux. Docker’s devicemapper storage driver leverages the thin provisioning and snapshot capabilities of this framework for image and container management. This article refers to the Device Mapper storage driver as devicemapper, and the kernel framework as Device Mapper. For the systems where it […]

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April 7, 2018

docker concept for DBA-part-2 Run docker for non-privileged user (Other than root)

You need to change group to docker for user (non-privileged user) otherwise you get following error:- [user@debasiseric1 ~]$ docker images Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.37/images/json: dial unix /var/run/docker.sock: connect: permission denied Now I will login to root sudo su – cd /var/run [root@debasiseric1 run]# ls -al docker.sock srw-rw—- 1 […]

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April 7, 2018

Docker concept -part 1-Concept and Installation of docker in CentOS

A. Basic Concept of docker   Docker is a platform for developers and sysadmins to develop, deploy, and run applications with containers. The use of Linux containers to deploy applications is called containerization. Containers are not new, but their use for easily deploying applications is. Containerization is increasingly popular because containers are: Flexible: Even the most complex applications can be containerized. Lightweight: Containers […]

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