Java Installation - Linux - Mithun Technologies - 9980923226

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Java Installation  in RHEL

#Login as a root user sudo su -

#Install JRE 1.8

yum install java-1.8.0-openjdk -y
java -version 

#Install JDK 1.8 

yum install java-1.8.0-openjdk-devel -y

javac -version 

#Install JRE 11  

yum install java-11-openjdk -y

java -version 

#Install JDK 11

yum install java-11-openjdk-devel -y

javac -version  

Java Installation  in Ubuntu ##Login as a root user sudo su -

Java Installation in Ubuntu Linux Server - Mithun Technologies - 9980923226

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                                                       http://mithuntechnologies.com/
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Java Installation in Ubuntu Linux Server

 

 By default, Ubuntu 18.04 includes OpenJDK version 11,which is an open-source variant of the JRE and JDK.

To install this version, first update the package index with below command.

#sudo apt update

Then execute below commands based on which version you want to install.

#apt install default-jre : For Defauly version.
#apt install openjdk-11-jre-headless : For Java 11
#apt install openjdk-8-jre-headless : For Java 8

Verify the Java installation with below command.
#java -version

To install the JDK, execute the following command, which will also install the JRE.

#sudo apt install default-jdk

Verify that the JDK is installed by checking the version of javac, the Java compiler using below command.

#javac -version


To Install the Open JDK 8, use the below command.

#sudo apt install openjdk-8-jdk

SonarQube Installation - Linux - Mithun Technologies - 9980923226

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                                                       http://mithuntechnologies.com/
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SonarQube Server Installation

#!/bin/bash     
#title                : Install SonarQube server
#description     : Execute this script as a normal user
#author             : Mthun Technologies
#date                 : 08112012
#version            : 1.0   
#CopyRights     : Mithun Technologies
#Contact            : 9980923226 | devopstrainingblr@gmail.com

#Hardware Requirements for SonarQube
#----------------------------------------------------
#The SonarQube server requires at least 2GB of RAM to run efficiently and 1GB of free RAM for the OS.

#Login as a root user.
sudo su -

 

Install Java ( Java is the Pre Requisite Software)

--------------------------------------------------------------
yum install java-11-openjdk-devel -y

#Download the SonarqQube Server software.
cd /opt
yum install wget unzip -y
wget https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-9.6.1.59531.zip

unzip sonarqube-9.6.1.59531.zip

mv sonarqube-9.6.1.59531 sonarqube


#As a good security practice, SonarQuber Server is not advised to run sonar service as a root user, so create a new user called sonar user  and grant sudo access to manage nexus services as follows.
useradd sonar

Give the sudo access to sonar user
visudo

sonar   ALL=(ALL)       NOPASSWD: ALL

Change the owner and group permissions to /opt/sonarqube/ directory.
chown -R sonar:sonar /opt/sonarqube/
chmod -R 775 /opt/sonarqube/
su - sonar
cd /opt/sonarqube/bin/linux-x86-64/

./sonar.sh start

Troubleshooting
--------------------

sonar service is not starting?

a)make sure you need to change the ownership and group to /opt/sonarqube/ directory for sonar user.
b)make sure you are trying to start sonar service with sonar user.
c)check java is installed or not using java -version command.

Unable to access SonarQube server URL in browser?

a)make sure port 9000 is opened in security groups - AWS ec2 instance.

Create SonarQube server as a sonar service
--------------------------------------------------------

ln /opt/sonarqube/bin/linux-x86-64/sonar.sh /etc/init.d/sonar

vi /etc/init.d/sonar

#add below lines in /etc/init.d/sonar

SONAR_HOME=/opt/sonarqube
PLATFORM=linux-x86-64

WRAPPER_CMD="${SONAR_HOME}/bin/${PLATFORM}/wrapper"
WRAPPER_CONF="${SONAR_HOME}/conf/wrapper.conf"
PIDDIR="/opt/sonarqube/"

#Enable the sonar service
sudo systemctl enable sonar

#Start the sonar service
sudo systemctl start sonar

#Check the status of the  sonar service
sudo systemctl status sonar

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JFrog Artifactory Installation - Linux - Mithun Technologies - +91 99809 23226

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                                                  JFrog Artifactory OSS Installation

#Pre Requisites

Java is the pre requisite for installing JFrog Artifactory .

Follow below url for installing Java.

https://mithuntechnologies-devops.blogspot.com/search/label/Java

#Login as a root user
sudo su -
cd /opt
yum install tar wget -y

#Download  the JFrog artifactory software 

Use below to select the version

https://jfrog.com/download-legacy/  --> PRO Editions

https://jfrog.com/open-source/#artifactory --> OSS Editions

wget https://bintray.com/jfrog/artifactory-rpms/rpm -O bintray-jfrog-artifactory-oss-rpms.repo

sudo mv  bintray-jfrog-artifactory-oss-rpms.repo /etc/yum.repos.d/

#Install  the JFrog artifactory software
yum install jfrog-artifactory-oss

#Enable the artifactory services
systemctl enable artifactory

#Start the artifactory service
systemctl start artifactory

#Check  the artifactory service status
systemctl status artifactory

#Access the JFrog Artifactory server from Laptop/Desktop browser.

 

http://IPAddess/Hostname:8081/

#Default Credentials

User Name: admin

Password: password

Troubleshooting
---------------------
artifactory service is not starting?
a)check java is installed or not using java -version command.


Unable to access JFrog Artifactory URL?
----------------------------------------------------
a)make sure port 8081 is opened in security groups in AWS ec2 instance.

Oracle Java Installation - Linux - Mithun Technologies - 9980923226

 

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                                                       http://mithuntechnologies.com/
                                                       http://mithuntechnologies.co.in/ 

Java Installation  in RHEL

#Login as a root user
sudo su -

##Change dir to /opt
cd /opt
yum install wget -y
wget -c --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm
yum install jdk-8u131-linux-x64.rpm -y

java -version

 

 

Install Maven Build Tool in MAC - Mithun Technologies - +919980923226

             Mithun Technologies            +91-9980923226              devopstrainingblr@gmail.com
                                                       http://mithuntechnologies.com/
                                                       http://mithuntechnologies.co.in/ 

Install Maven Build Tool in MAC Book / Set Class path for Maven Build Tool in MAC Book
---------------------------------------------------------------------------------------------------------------------

Pre Requisite Software
-----------------------------
Java is the Pre Requisite Software for Maven.

java -version


Install Maven
------------------
Download the Maven Software using below url.
https://maven.apache.org/download.cgi

Set the class path/Environmental Variable
vi ~/.bash_profile

export M2_HOME=/Users/mithunreddy/MithunTechnologies/Softwares/Running/apache-maven-3.6.2

export PATH=$PATH:$M2_HOME/bin

source ~/.bash_profile

Check the Maven version

mvn -version

Install Gradle Build Tool in MacBook - Mithun Technologies - +919980923226

 
             Mithun Technologies            +91-9980923226              devopstrainingblr@gmail.com
                                                       http://mithuntechnologies.com/
                                                       http://mithuntechnologies.co.in/ 

Install Gradle Build Tool in MAC Book / Set Class path for Gradle Build Tool in MAC Book
---------------------------------------------------------------------------------------------------------------------

Pre Requisite Software
-----------------------------
Java is the Pre Requisite Software for Gradle.

java -version


Install Gradle
------------------
Download the Gradle Software using below url.

https://services.gradle.org/distributions/

Set the class path/Environmental Variable
vi ~/.bash_profile

export GRADLE_HOME=/Users/mithunreddy/MithunTechnologies/Softwares/Running/gradle-6.6.1

export PATH=$PATH:$GRADLE_HOME/bin

source ~/.bash_profile

Check the Gradle version

gradle-version

Tomcat Installation - Linux - Mithun Technologies - 9980923226

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                                                       http://mithuntechnologies.com/
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Tomcat Installation

#Login as a root user
sudo su -

yum install wget unzip -y

cd /opt

wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.86/bin/apache-tomcat-9.0.86.zip

unzip apache-tomcat-9.0.86.zip

cd /opt/apache-tomcat-9.0.86

chmod u+x *.sh

ln -s /opt/apache-tomcat-9.0.86/bin/startup.sh /usr/bin/startTomcat

ln -s /opt/apache-tomcat-9.0.86/bin/shutdown.sh /usr/bin/stopTomcat

#ps -fax | grep tomcat

#netstat -tunlap

#vi /opt/apache-tomcat-9.0.65/webapps/manager/META-INF/context.xml

#Comment the below lines

#<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"

# allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->

startTomcat

#stopTomcat

 

#Create a user

#vi /opt/apache-tomcat-9.0.44/conf/tomcat-users.xml

		Troubleshooting -------------------- tomcat server is not starting? a)Check the catalina.out file which is available  in conf dir. b)check java is installed or not using java -version command. Unable to access Tomcat server URL in browser? a)make sure port 8080 is opened in security groups - AWS ec2 instance.

Nexus Server Installation in Linux - Mithun Technologies - +91-9980923226

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Login as a root user
sudo su -
cd /opt
yum install tar wget -y
wget http://download.sonatype.com/nexus/3/nexus-3.15.2-01-unix.tar.gz
tar -zxvf nexus-3.15.2-01-unix.tar.gz
mv /opt/nexus-3.15.2-01 /opt/nexus

#As a good security practice, Nexus is not advised to run nexus service as a root user, so create a new user called nexus and grant sudo access to manage nexus services as follows.
 
useradd nexus

#Give the sudo access to nexus user

visudo
nexus ALL=(ALL) NOPASSWD: ALL

#Change the owner and group permissions to /opt/nexus and /opt/sonatype-work directories.

chown -R nexus:nexus /opt/nexus
chown -R nexus:nexus /opt/sonatype-work
chmod -R 775 /opt/nexus
chmod -R 775 /opt/sonatype-work

#Open /opt/nexus/bin/nexus.rc file and  uncomment run_as_user parameter and set as nexus user.

vi /opt/nexus/bin/nexus.rc
run_as_user="nexus"

#Create nexus as a service

ln -s /opt/nexus/bin/nexus /etc/init.d/nexus

#Switch as a nexus user and start the nexus service as follows.

sudo su - nexus

#Enable the nexus services
sudo systemctl enable nexus

#Start the nexus service
sudo systemctl start nexus

#Access the Nexus server from Laptop/Desktop browser.

 

http://IPAddess/Hostname:8081/

#Default Credentials

User Name:

Password:

Troubleshooting
---------------------
nexus service is not starting?

a)make sure need to change the ownership and group to /opt/nexus and /opt/sonatype-work directories and permissions (775) for nexus user.
b)make sure you are trying to start nexus service with nexus user.
c)check java is installed or not using java -version command.
d) check the nexus.log file which is availabe in  /opt/sonatype-work/nexus3/log  directory.

Unable to access nexus URL?
-------------------------------------
a)make sure port 8081 is opened in security groups in AWS ec2 instance.

PUSH/PULL Docker Image form Private Repository (Nexus) - Mithun Technologies +91-9980923226

PUSH/PULL Docker Image form Private Repository (Nexus)

Pre-Requisities:

Server 1: Ubuntu                                         Server 2: Ubuntu

Install the below softwares in Server1          Install the below softwares in Server2

Java 8                                                              Docker

Docker

Jenkins

Maven/Gradle

Server 1:

1   We are going to build our project using maven/gradle

2   Through docker file we are going to create an docker image for that project

3   We are going to push the docker image to Nexus (docker hosted) repo

Server 2:

1  We are going to pull the docker image form Nexus (docker hosted) repo

2   Create a container using the docker image

Nexus Repository (docker hosted,proxy) Creation:

docker hosted:   

1) Login to your Nexus repository.

2) Create docker hosted

 

 Here give a name to the repo (dock-hosted), then we are going to assign a port to this docker hosted repo. Through this port we are going to access this repo. (Note: you should not give 8081 because it is already assigned to Nexus Repo, so use different port number)

In this case I have assigned 8083 for this repo.

3) Keep the remaining settings as it is and create repository

 Note: Open 8083 in AWS Security Groups.

Ubuntu Configuration : Server 1 & 2

Do these steps in both the servers in order to push and pull docker images from Nexus Repo.

1.     Login as root user

2.     Go to /etc/docker

            cd /etc/docker

3.     Then create a file called daemon.json

vi /etc/docker/daemon.json

4.     Write these script in daemon.json

{

  "insecure-registries": [ "13.234.21.143:8083" ]

}

(Here we are allowing our docker daemon to access the Nexus Hosted Repo)

5.     Save the file

6.     Restart docker service using below command.

            systemctl restart docker

 

Server 1: Login,Build & Push

1 Login to Nexus repo

docker login –u admin –p password 13.234.21.143:8083

(or)

docker login 13.234.21.143:8083

2  Build an image using below command.

docker build –t 13.234.21.143:8083/image1 .

           

(here while building an docker image we will use ip address with port for the docked hosted repo instead of username in hub.docker.com)

 

3 Push docker image to Nexus Repo

Server 2: Pull image/Run container

1.     Login to Nexus

2   Pull docker image

 

3  Build a container

docker run –d –p 8090:8080 –p 9990:9990 - -name wildfly 13.234.21.143:8083/image1

(I am using wildfly to deploy)