Openshift Presentation ppt compare with VM
- 1. Openshift for Beginners: Demo on building and deploying application from scratch with in Openshift
- 2. Download the PPT and code from github as below # git clone https://github.com/kiranpampana/kiran-app.git Our application is a telephone directory which displays username/country and phone number . Application has 2 parts • 1) Web app built using Python and Flask framework • 2)MYSQL database holds user data that is being used by web app WEBAPP MYSQL DATABASE
- 3. Pages displayed by the app • First page is a Welcome page with information • Second page is displaying details accessed from a mysql database
- 4. We need to know about containers/pods. But why ? Pods are the basic building blocks of Openshift. Pod is a group of one or more containers. What are containers ? Lets find out why we need containers and understand them by comparing with Virtual machines , as VM’s are well understood
- 5. PHYSICAL MACHINE HARDWARE (CPU/RAM/DISK) OPERATING SYSTEM USER SPACE KERNEL SPACE DB1 APP3 APP2 APP1 TRADITIONAL
- 6. What are the problems with traditional system ?
- 7. 1) Security, as files of one app can be viewed by another app owner 2) Resource exploitation by any app 3) If an app needs reboot , it impacts other apps as well 4) ………………. 5) ……….. 6) ... PHYSICAL MACHINE HARDWARE (CPU/RAM/DISK) OPERATING SYSTEM USER SPACE KERNEL SPACE A P P 1 A P P 2 A P P 3
- 8. In-order to address problems with traditional system we need Physical or Logical separation between applications
- 9. Virtualization and containerization provide logical separation for Applications
- 10. PHYSICAL MACHINE HARDWARE (CPU/RAM/DISK) HYPERVISOR KERNEL VIRTUAL HW1 VM1 OS USER SPACE1 VM1 KERNEL A PP 1 VIRTUAL HW2 VM2 OS VM2 KERNEL USER SPACE2 A PP 2 PHYSICAL MACHINE HARDWARE (CPU/RAM/DISK) OPERATING SYSTEM KERNEL CONTAINER 1 CONTAINER 2 USER SPACE1 USER SPACE2 A PP 1 A PP 2 VIRTUALIZATION CONTAINERIZATION
- 11. Containerization Virtualization Are about virtualizing the operating system subsystems(Network,Filesystems,Process…) Based on emulating Hardware or are about virtualizing hardware Single kernel Multiple kernels Initially embraced by service providers Initially embraced by enterprises Under resource crunch containers are stable then VMs as only one kernel tries to solve problem Under resource crunch VM's running on hypervisors are unstable as one+ kernels start to solve the same problem Lightness makes them far more dense and elastic Less elasticity and density
- 12. We need to know about docker . But why ? Docker is a tool for managing containers .Rkt is similar tool like docker . Openshift uses docker
- 13. PHYSICAL MACHINE HARDWARE (CPU/RAM/DISK) OPERATING SYSTEM KERNEL CONTAINER 2 USER SPACE 2 APP2 CONTAINER 1 USER SPACE 1 APP1 DOCKER
- 14. Demo is consisting of 3 parts Part 1: Deploy application on a Machine Part 2 :Deploy application with in Containers Part 3: Deploy application with in Openshift
- 15. Part 1: Deploy application on a Machine Application can be depicted as below CENTOS 7 VM/ IP_ADDR = 192.168.121.9 WEB-APP MYSQL DB
- 16. Setup Details Centos 7 VM ,running on Oracle virtualbox Software’s to be installed are python,flask, flask_mysqldb,mysql,mysql-server,git Installation commands for reference (should have internet access) : yum install -y epel-release python python-devel mysql-devel redhat-rpm-config gcc git wget wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm rpm -ivh mysql57-community-release-el7-9.noarch.rpm yum install -y mysql-server python-pip pip install flask pip install flask_mysqldb systemctl start mysqld systemctl disable firewalld systemctl stop firewalld cat /var/log/mysqld.log |grep "temporary password" |awk '{print $11}' > /var/tmp/mysql-passwd mysql -u root -p`cat /var/tmp/mysql-passwd` ALTER USER 'root'@'localhost' IDENTIFIED BY 'HardPassword*1'; uninstall plugin validate_password; ALTER USER 'root'@'localhost' IDENTIFIED BY 'password'; exit;
- 17. Upload data to the database : Mysql server should already be running , connect to the mysql as below , then create database/table and upload data mysql -u root –p CREATE DATABASE tel_dir; use tel_dir; CREATE TABLE details( id INT NOT NULL AUTO_INCREMENT, name VARCHAR(100) NOT NULL, country VARCHAR(40) NOT NULL, phone INT NOT NULL, PRIMARY KEY(id)); use tel_dir; INSERT INTO details (id,name,country,phone) VALUES (1,"kiran","india",12345); INSERT INTO details (name,country,phone) VALUES ("bart","belgium",34567);
- 18. Download application code from github as below git clone https://github.com/kiranpampana/kiran-app.git Running above would download code to directory kiran-app, go to directory kiran-app/app and check the code in app.py cd kiran-app/app cat app.py Now run the application as below python app.py localhost Connect to web browser and check both the links below, ensure no firewalls are blocking (ip address of my centos7 vm is 192.168.121.9 , you have to use the ip of your VM) http://192.168.121.9:5000 http://192.168.121.9:5000/tel_dir
- 19. Part 2 :Deploy application with in Containers Application can be depicted as below CENTOS 7 VM /(IP_ADDR = 192.168.121.9) APP CONTAINER DB CONTAINER DOCKER
- 20. Setup Details Centos 7 VM ,running on Oracle virtualbox (same as the earlier one) Install docker and start it yum install –y docker systemctl enable docker systemctl start docker
- 21. Create and Start database container as below docker run -itd --name db -e MYSQL_ROOT_PASSWORD=password mysql Connect to container docker exec –it db bash
- 22. connect to the mysql as below , then create database/table and upload data mysql -u root –p CREATE DATABASE tel_dir; use tel_dir; CREATE TABLE details( id INT NOT NULL AUTO_INCREMENT, name VARCHAR(100) NOT NULL, country VARCHAR(40) NOT NULL, phone INT NOT NULL, PRIMARY KEY(id)); use tel_dir; INSERT INTO details (id,name,country,phone) VALUES (1,"kiran","india",12345); INSERT INTO details (name,country,phone) VALUES ("bart","belgium",34567);
- 23. • Go to directory having earlier downloaded kiran-app git repository ,it should have Dockerfile ,verify that file # cd ~/kiran-app # cat Dockerfile Build the docker image as below using Dockerfile # docker build -t kiranpampana/kiran-app . Upload the docker image having the app to the dockerhub for later use # docker login # docker push kiranpampana/kiran-app Start the app container using IP of db container as below #docker inspect db |grep "IPAddress" "SecondaryIPAddresses": null, "IPAddress": "172.17.0.2", # docker run -itd -p 63317:5000 --name app -e MYSQL_HOST=172.17.0.2 kiranpampana/kiran-app Connect to web browser and check both the links below, ensure no firewalls are blocking (ip address of my centos7 vm is 192.168.121.9 , you have to use the ip of your VM) http://192.168.121.9:63317 http://192.168.121.9:63317/tel_dir
- 24. Part 3 : Deploy application in openshift Setup Details Openshift Origin 1.5.1 installed on centos 7 machines (google cloud) Openshift cluster has 1 master and 2 minion nodes. Openshift cluster o-master o-node2 o-node1
- 25. Application in openshift can be depicted as below Pod Pod is a group of ONE or more containers Internet route (HA PROXY/LOAD BALANCER) service (Internal proxy/load balancer) Pod1 Pod2
- 26. • Login into o-master and download git as below git clone https://github.com/kiranpampana/kiran-app.git Running above would download code to directory kiran-app, go to directory kiran-app/ and check , you should various yaml files We shall deploy the app now Check kiran-app.yaml file and try to understand its contents Lets deploy application as below oc create -f kiran-app.yaml Check using below commands, pod with kiran-app should have been created oc get pods We shall create the service now for the app Check kiran-svc.yaml file and try to understand its contents Let create the services as below oc create -f kiran-svc.yaml Check using below commands , new service with name kiran-app should have been created oc get svc
- 27. We shall create a route for the kiran-app service as below oc expose svc kiran-app Check the new route created as below oc get route Use the route obtained above to access the app , for my case its http://kiran-app-my-test.apps.kiran-pampana.tk Try to access http://kiran-app-my-test.apps.kiran-pampana.tk/tel_dir ,it should through error because db is not yet created
- 28. Pod kiran-app**** (oc create –f kiran-app.yaml) Service kiran-app (oc create –f kiran-svc.yaml) Route kiran-app-my-test.apps.kiran-pampana.tk (oc expose svc kiran-app) Mysql db
- 29. We shall deploy the db now Check mysql-db.yaml file and try to understand its contents Lets deploy application as below oc create -f mysql-db.yaml Check using below commands, pod with mysql-** should have been created oc get pods We shall create the service now for the app Check mysql-svc.yaml file and try to understand its contents Let create the services as below oc create -f mysql-svc.yaml Check using below commands , new service with name mysql should have been created oc get svc
- 30. Connect to the mysql pod as below after by identifying it oc get pods oc rsh mysql-*** Connect to database and upload data as below mysql -u root –p CREATE DATABASE tel_dir; use tel_dir; CREATE TABLE details( id INT NOT NULL AUTO_INCREMENT, name VARCHAR(100) NOT NULL, country VARCHAR(40) NOT NULL, phone INT NOT NULL, PRIMARY KEY(id)); use tel_dir; INSERT INTO details (id,name,country,phone) VALUES (1,"kiran","india",12345); INSERT INTO details (name,country,phone) VALUES ("bart","belgium",34567);
- 31. Pod kiran-app**** (oc create –f kiran-app.yaml) Service kiran-app (oc create –f kiran-svc.yaml) Route kiran-app-my-test.apps.kiran-pampana.tk (oc expose svc kiran-app) Try to access http://kiran-app-my-test.apps.kiran-pampana.tk/tel_dir ,it should work Service mysql (oc create –f mysql-svc.yaml) Pod mysql-**** (oc create –f mysql-db.yaml)
- 32. Thank you