Source:

• https://www.theserverside.com/news/1364121/Setting-Up-a-Maven-Repository
• https://www.theserverside.com/blog/Coffee-Talk-Java-News-Stories-and-Opinions/Nexus-repository-manager-tutorial-Get-started-with-the-OSS-Maven-tool
• https://help.sonatype.com/repomanager2/download
• https://hub.docker.com/r/sonatype/nexus3/
• https://help.sonatype.com/repomanager3/release-notes/2019-release-notes
• https://www.theserverside.com/tutorial/How-to-install-Maven-and-build-apps-with-the-mvn-command-line

 

---

PreReqs

• jdk8
• nexus
• firewall-cmd for port8081
• apt install hashalot / sha256sum

 

Install Maven CLI

How to install Maven

A Maven install is one of the easier software installations you can do. At a high level, the steps to install Maven are:

1. Download Maven binaries from the Apache website.
2. Unzip the Apache Maven download, and move the folder to a place on your computer where you keep all of your other DevOps tools.
3. Add system variables named MAVEN_HOME and M2_HOME, and point both of these variables to the root Maven directory. The root Maven directory will contain a folder named \bin, which contains the pivotally important mvn command-line utility.
4. The root Maven directory contains a subfolder named \bin. Add this \bin directory to the OS' path. This makes the mvn command-line tool universally available to the OS.

In my personal development environments, I like to rename the Maven directory _maven, and when I install Maven on a Windows machine, I place that folder directly in the root of the C: drive. Here's how the system variables and edited path look after you successfully configure and install Maven.

 

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Install Nexus OSS

Download

wget https://download.sonatype.com/nexus/3/latest-unix.tar.gz

Unpack

tar -xzf latest-unix.tar.gz

Start

./nexus start

Add hole in firewall for port 8081

sudo firewall-cmd --permanent --add-port=8081/tcp

sudo firewall-cmd --reload

 

 

The default username and password for the Nexus Maven repository is: admin:admin123. When the Nexus repository manager’s administrative console loads, log in with these credentials.

 

Admin>Repository>Repositories

 

• Name: uc-maven
• Online: YES

Maven2

• Version policy: Release
• Layout policy: Strict

 

Storage

• blob store: default
• Strict Content Type Validation: YES

Hosted

• Deployment policy: Disable redeploy

Cleanup Policy

• Available cleanup policies: None

Create repository

---

 

 

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Maven Installation

• https://maven.apache.org/download.cgi#
• https://maven.apache.org/install.html

System Requirements

 

Java Development Kit (JDK)	Maven 3.3+ require JDK 1.7 or above to execute - they still allow you to build against 1.3 and other JDK versions by Using Toolchains
Memory	No minimum requirement
Disk	Approximately 10MB is required for the Maven installation itself. In addition to that, additional disk space will be used for your local Maven repository. The size of your local repository will vary depending on usage but expect at least 500MB.
Operating System	No minimum requirement. Start up scripts are included as shell scripts and Windows batch files.

 

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Download & Extract

[setup@c7 maven]$ wget http://apache.mirrors.pair.com/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.tar.gz
--2019-04-13 03:36:19--  http://apache.mirrors.pair.com/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.tar.gz
Resolving apache.mirrors.pair.com (apache.mirrors.pair.com)... 216.92.2.131
Connecting to apache.mirrors.pair.com (apache.mirrors.pair.com)|216.92.2.131|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9136463 (8.7M) [application/x-gzip]
Saving to: ‘apache-maven-3.6.1-bin.tar.gz’

100%[==========================================================================>] 9,136,463   15.0MB/s   in 0.6s   

2019-04-13 03:36:20 (15.0 MB/s) - ‘apache-maven-3.6.1-bin.tar.gz’ saved [9136463/9136463]

[setup@c7 maven]$ tar -xzf apache-maven-3.6.1-bin.tar.gz
[setup@c7 maven]$ ls
apache-maven-3.6.1  apache-maven-3.6.1-bin.tar.gz
[setup@c7 maven]$ ls apache-maven-3.6.1
bin  boot  conf  lib  LICENSE  NOTICE  README.txt
[setup@c7 maven]$ cd ..
[setup@c7 Downloads]$ ls
cat  get-docker.sh  if.txt  less  maven  nano  nexus  temp
[setup@c7 Downloads]$ cd maven
[setup@c7 maven]$ ls
apache-maven-3.6.1  apache-maven-3.6.1-bin.tar.gz

---

Making mvn executable

[setup@c7 maven]$ cd apache-maven-3.6.1
[setup@c7 apache-maven-3.6.1]$ ls
bin  boot  conf  lib  LICENSE  NOTICE  README.txt
[setup@c7 apache-maven-3.6.1]$ cd bin
[setup@c7 bin]$ ls
m2.conf  mvn  mvn.cmd  mvnDebug  mvnDebug.cmd  mvnyjp
[setup@c7 bin]$ sudo chmod +x mvn
[sudo] password for setup:
[setup@c7 bin]$ ls -la
total 32
drwxrwxr-x. 2 setup setup   97 Apr 13 03:36 .
drwxrwxr-x. 6 setup setup   99 Apr 13 03:36 ..
-rw-r--r--. 1 setup setup  228 Apr  4 13:56 m2.conf
-rwxr-xr-x. 1 setup setup 5741 Apr  4 13:56 mvn
-rw-r--r--. 1 setup setup 6349 Apr  4 13:56 mvn.cmd
-rwxr-xr-x. 1 setup setup 1485 Apr  4 13:56 mvnDebug
-rw-r--r--. 1 setup setup 1668 Apr  4 13:56 mvnDebug.cmd
-rwxr-xr-x. 1 setup setup 1532 Apr  4 13:56 mvnyjp

---

Add mvn to PATH

[setup@c7 bin]$ echo $PATH

[setup@c7 bin]$ export PATH=$PATH:/home/setup/Downloads/maven/apache-maven-3.6.1/bin

---

 

Verifying Installation

 

[setup@c7 bin]$ mvn -v
Apache Maven 3.6.1 (d66c9c0b3152b2e69ee9bac180bb8fcc8e6af555; 2019-04-04T14:00:29-05:00)
Maven home: /home/setup/Downloads/maven/apache-maven-3.6.1
Java version: 1.8.0_201, vendor: Oracle Corporation, runtime: /usr/java/jdk1.8.0_201-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.10.0-862.14.4.el7.x86_64", arch: "amd64", family: "unix"

 

 

---

Maven Repository Architecture

 

 

 

 

 

---

Install JDK8 on CentOS7

 

[setup@c7 jvm]$ sudo wget --header "Cookie: oraclelicense=accept-securebackup-cookie" https://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm
--2019-04-13 01:06:14--  https://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm
Resolving download.oracle.com (download.oracle.com)... 104.73.166.201
Connecting to download.oracle.com (download.oracle.com)|104.73.166.201|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://edelivery.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm [following]
--2019-04-13 01:06:14--  https://edelivery.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm
Resolving edelivery.oracle.com (edelivery.oracle.com)... 23.2.49.236, 2600:1404:5800:193::366, 2600:1404:5800:1a5::366
Connecting to edelivery.oracle.com (edelivery.oracle.com)|23.2.49.236|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm?AuthParam=1555135696_27e878e8049f0de9d502264a11cb8683 [following]
--2019-04-13 01:06:14--  http://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm?AuthParam=1555135696_27e878e8049f0de9d502264a11cb8683
Connecting to download.oracle.com (download.oracle.com)|104.73.166.201|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm?AuthParam=1555135696_27e878e8049f0de9d502264a11cb8683 [following]
--2019-04-13 01:06:14--  https://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u201-linux-x64.rpm?AuthParam=1555135696_27e878e8049f0de9d502264a11cb8683
Connecting to download.oracle.com (download.oracle.com)|104.73.166.201|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 176209195 (168M) [application/x-redhat-package-manager]
Saving to: ‘jdk-8u201-linux-x64.rpm’

100%[==========================================================================>] 176,209,195 6.84MB/s   in 24s    

2019-04-13 01:06:38 (7.04 MB/s) - ‘jdk-8u201-linux-x64.rpm’ saved [176209195/176209195]

[setup@c7 jvm]$ sudo yum localinstall jdk-8u201-linux-x64.rpm
Loaded plugins: fastestmirror
Examining jdk-8u201-linux-x64.rpm: 2000:jdk1.8-1.8.0_201-fcs.x86_64
Marking jdk-8u201-linux-x64.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package jdk1.8.x86_64 2000:1.8.0_201-fcs will be installed
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================================
 Package             Arch                Version                            Repository                         Size
====================================================================================================================
Installing:
 jdk1.8              x86_64              2000:1.8.0_201-fcs                 /jdk-8u201-linux-x64              288 M

Transaction Summary
====================================================================================================================
Install  1 Package

Total size: 288 M
Installed size: 288 M
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 2000:jdk1.8-1.8.0_201-fcs.x86_64                                                                 1/1
Unpacking JAR files...
    tools.jar...
    plugin.jar...
    javaws.jar...
    deploy.jar...
    rt.jar...
    jsse.jar...
    charsets.jar...
    localedata.jar...
  Verifying  : 2000:jdk1.8-1.8.0_201-fcs.x86_64                                                                 1/1

Installed:
  jdk1.8.x86_64 2000:1.8.0_201-fcs                                                                                  

Complete!