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Exploring-Software-Defined-Networking-Lab-2.txt
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Exploring-Software-Defined-Networking-Lab-2.txt
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Demo: Exploring Software Defined Networking
###########################################
1. Create the network-test project:
[root@master ~]# oc new-project network-test
2. Deploy the scaling application from the Github Repo.
[root@master ~]# oc new-app --name=hello openshift/php~https://github.com/sureshchandrarhca15/openshift-php-hello-world.git
3. Get the build details
[root@master ~]# oc get bc
NAME TYPE FROM LATEST
hello Source Git 1
[root@master ~]# oc logs -f bc/hello
4. Get the Deployment Config details
[root@master ~]# oc get dc
NAME REVISION DESIRED CURRENT TRIGGERED BY
hello 1 1 1 config,image(hello:latest)
5. Get the Service details
[root@master ~]# oc get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
hello ClusterIP 172.30.67.36 <none> 8080/TCP,8443/TCP 8m
6. Run the following command to verify that the application pod is ready and running. It
will take some time to build and deploy the pods.
[root@master ~]# oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
hello-1-build 0/1 Completed 0 3m 10.129.0.9 node2.openshift.example.com
hello-1-d4wjz 1/1 Running 0 1m 10.129.0.10 node2.openshift.example.com
7. Scale the application to two pods:
[root@master ~]# oc scale --replicas=2 dc hello
[root@master ~]# oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
hello-1-build 0/1 Completed 0 13m 10.129.0.9 node2.openshift.example.com
hello-1-d4wjz 1/1 Running 0 11m 10.129.0.10 node2.openshift.example.com
hello-1-vfxks 1/1 Running 0 1m 10.131.0.20 node1.openshift.example.com
[root@master ~]# oc get dc
NAME REVISION DESIRED CURRENT TRIGGERED BY
hello 1 2 2 config,image(hello:latest)
8. Verify that the application is accessible using the individual pod IP addresses.
[root@master ~]# curl 10.129.0.10:8080
[root@master ~]# curl 10.131.0.20:8080
9. Verify that the application is not accessible from other node which is not the part of Openshift Cluster, using the IP addresses
listed in the previous step:
10. Verify that the application is accessible using the service IP address (also known as the cluster IP)
[root@master ~]# oc get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
hello ClusterIP 172.30.67.36 <none> 8080/TCP,8443/TCP 20m
[root@master ~]# curl 172.30.67.36:8080
11. Inspect the service Type
[root@master ~]# oc describe svc hello
[root@master ~]# oc get svc hello -o yaml | tee hello-svc.yml
12. Edit the service configuration for the application and change the service type to NodePort.
[root@master ~]# oc edit svc hello
....
type: NodePort
.....
:wq (save and exit)
[root@master ~]# oc describe svc hello
Name: hello
Namespace: network-test
Labels: app=hello
Annotations: openshift.io/generated-by=OpenShiftNewApp
Selector: app=hello,deploymentconfig=hello
Type: NodePort
IP: 172.30.67.36
Port: 8080-tcp 8080/TCP
TargetPort: 8080/TCP
NodePort: 8080-tcp 31403/TCP
Endpoints: 10.129.0.10:8080,10.131.0.20:8080
Port: 8443-tcp 8443/TCP
TargetPort: 8443/TCP
NodePort: 8443-tcp 30960/TCP
Endpoints: 10.129.0.10:8443,10.131.0.20:8443
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
13. Access the application using the NodePort IP address from the other node which is not the part of openshift cluster:
sam@ThinkPad-E450:~$ curl http://node1.openshift.example.com:31403
Welcome to OpenShift 3.9 Cluster Training...:)sam@ThinkPad-E450:~$
sam@ThinkPad-E450:~$ curl http://node2.openshift.example.com:31403
Welcome to OpenShift 3.9 Cluster Training...:)sam@ThinkPad-E450:~$
14. Edit the service configuration for the application and change the service type to ClusterIP.
[root@master ~]# oc edit svc hello
....
type: ClusterIP
.....
:wq (save and exit)
[root@master ~]# oc describe svc hello
Name: hello
Namespace: network-test
Labels: app=hello
Annotations: openshift.io/generated-by=OpenShiftNewApp
Selector: app=hello,deploymentconfig=hello
Type: ClusterIP
IP: 172.30.67.36
Port: 8080-tcp 8080/TCP
TargetPort: 8080/TCP
Endpoints: 10.129.0.10:8080,10.131.0.20:8080
Port: 8443-tcp 8443/TCP
TargetPort: 8443/TCP
Endpoints: 10.129.0.10:8443,10.131.0.20:8443
Session Affinity: None
Events: <none>
15. Create route for hello service
[root@master ~]# oc expose service hello --hostname=hello.apps.openshift.example.com
[root@master ~]# oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
hello hello.apps.openshift.example.com hello 8080-tcp None
16. Open the Browser and point to the below URL:
http://hello.apps.openshift.example.com/
17. Let's create a secure route for hello service
[root@master ~]# oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
hello hello.apps.openshift.example.com hello 8080-tcp None
[root@master ~]# oc delete route hello
route "hello" deleted
[root@master ~]# oc get route
No resources found.
18. First Create a self sign certificate for hello service.
[root@master ~]# openssl genrsa -out hello.key 2048
[root@master ~]# openssl req -new -key hello.key -out hello.csr -subj "/C=IN/ST=Delhi/L=NewDelhi/O=Example/OU=DevOps/CN=hello.apps.openshift.example.com"
[root@master ~]# openssl x509 -req -days 366 -in hello.csr -signkey hello.key -out hello.crt
19. Create a secure edge-terminated route using the generated TLS certificate and key.
[root@master ~]# oc create route edge --service=hello --hostname=hello.apps.openshift.example.com --key=hello.key --cert=hello.crt
[root@master ~]# oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
hello hello.apps.openshift.example.com hello 8080-tcp edge None
[root@master ~]# oc get route/hello -o yaml
20. Now Open Web Browser and point to the following URL:
https://hello.apps.openshift.example.com
##################################################################################################################################
To create an application based on an Image from Docker Hub:
$ oc new-app mysql MYSQL_USER=user1 MYSQL_PASSWORD=password MYSQL_DATABASE=db1 MYSQL_ROOT_PASSWORD=supersecret -l db=mysql
To Create an application based on an Image from a private registry:
$ oc new-app --docker-image=myregistryserver.example.com:5000/mycompnay/myapp --name=myapp
To create an application based on source code stored in Git Repository:
$ oc new-app https://github.com/sureshchandrarhca15/openshift-39 --name=hello
To create an application based on source code stored in Git Hub and referencing to an Image stream:
$ oc new-app https://github.com/sureshchandrarhca15/openshift-39 -i php:7.0 --name=php-hello
#####################################################################################
Deploy MySQL as Backend and Apache-php Application as frontend
###############################################################
1. Let's create a Project named "project1"
[root@master ~]# oc new-project project1 --description='Demo Project1' --display-name='project1'
[root@master ~]# oc get projects
NAME DISPLAY NAME STATUS
default Active
kube-public Active
kube-system Active
logging Active
management-infra Active
openshift Active
openshift-infra Active
openshift-node Active
openshift-web-console Active
project1 project1 Active
Login to https://master.openshift.example.com:8443
Username : admin
Password : Pa$$w0rd
Select "project1" Project and Deploy MySQL Pod in it by following the below steps:
Click on "browse Catalog" -> Select MySQL (Ephemeral) -> Next ->
Database Service Name : mysql
MySQL Connection Username : mysql
MySQL Connection Password : mysql
MySQL root user Password : supersecret
MySQL Database Name : sampledb
Click on Create -> Close.
Now click on Project Overview and check the status. You can also check the status using CLI:
[root@master ~]# oc project project1
[root@master ~]# oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
mysql-1-n2j7k 1/1 Running 0 1m 10.130.0.8 node2.openshift.example.com
[root@master ~]# oc get dc
NAME REVISION DESIRED CURRENT TRIGGERED BY
mysql 1 1 1 config,image(mysql:5.7)
[root@master ~]# oc get rc
NAME DESIRED CURRENT READY AGE
mysql-1 1 1 1 2m
[root@master ~]# oc get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
mysql ClusterIP 172.30.99.205 <none> 3306/TCP 2m
Now create a table named "users" in sampledb Database
[root@master ~]# oc exec -it mysql-1-n2j7k /bin/bash
bash-4.2$
bash-4.2$ mysql -h172.30.99.205 -uroot -psupersecret
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sampledb |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql> use sampledb;
mysql> create table users (user_id int not null auto_increment, username varchar(200), PRIMARY KEY(user_id));
Query OK, 0 rows affected (0.02 sec)
mysql> insert into users values (null, 'suresh');
Query OK, 1 row affected (0.01 sec)
mysql> insert into users values (null, 'sam');
Query OK, 1 row affected (0.00 sec)
mysql> select * from users;
+---------+----------+
| user_id | username |
+---------+----------+
| 1 | suresh |
| 2 | sam |
+---------+----------+
2 rows in set (0.00 sec)
mysql> exit;
bash-4.2$ exit
Now let's Deploy a frontend Application which connect to MySQL Database.
Login to https://master.openshift.example.com:8443
Username: admin
Password: Pa$$w0rd
Select Project1 -> Click on "Add to Project" drop down menu-> select "Browse Catalog -> Select PHP Build Image -> Next
Version : 7.1 - latest
Application Name : dbtest
Git Repository : https://github.com/sureshchandrarhca15/openshift-dbtest.git
Click on Create -> Close
Now click on Overview in project1 and check the status.
You can also see the status by using the below command:
[root@master ~]# oc get bc
NAME TYPE FROM LATEST
dbtest Source Git@master 1
[root@master ~]# oc logs -f bc/dbtest
[root@master ~]# oc get dc
NAME REVISION DESIRED CURRENT TRIGGERED BY
dbtest 1 1 1 config,image(dbtest:latest)
mysql 1 1 1 config,image(mysql:5.7)
[root@master ~]# oc get rc
NAME DESIRED CURRENT READY AGE
dbtest-1 1 1 1 1m
mysql-1 1 1 1 16m
[root@master ~]# oc get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
dbtest ClusterIP 172.30.195.240 <none> 8080/TCP 5m
mysql ClusterIP 172.30.99.205 <none> 3306/TCP 16m
[root@master ~]# oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
dbtest dbtest-project1.apps.openshift.example.com dbtest 8080-tcp None
Now Open the Web Browser and Point to the below URL:
http://dbtest-project1.apps.openshift.example.com
http://dbtest-project1.apps.openshift.example.com/dbtest.php
#######################################################################################