installation-steps

Install cloudSDK
---------------------
https://cloud.google.com/sdk/docs/install#deb

vi /etc/sudoers
    jenkins ALL=(ALL) NOPASSWD: ALL
sudo su - jenkins

1) sudo apt-get install apt-transport-https ca-certificates gnupg
2) echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://packages.cloud.google.com/apt cloud-sdk main" | sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
3) curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
4) sudo apt-get update && sudo apt-get install google-cloud-cli
5) sudo apt-get install google-cloud-cli-app-engine-java
6) gcloud init
7) sudo apt-get update && sudo apt-get install google-cloud-cli=123.0.0-0
8) sudo apt-get install google-cloud-sdk-gke-gcloud-auth-plugin
9) https://cloud.google.com/blog/products/containers-kubernetes/kubectl-auth-changes-in-gke

TO authenticate GCR please follow the below document 
------------------------------------------------------
https://cloud.google.com/container-registry/docs/advanced-authentication

###Install kubectl in ubuntu####
----------------------------------
sudo apt-get install kubectl

sudo chown -R jenkins:jenkins /var/lib/jenkins

sudo chmod 666 /var/run/docker.sock

---------------------------------------------------------------------------------------------------------------------------

GCR configurations :
---------------------
https://cloud.google.com/container-registry/docs/advanced-authentication
root@master:~# history
     vi /etc/sudoers
     jenkins ALL=(ALL) NOPASSWD: ALL
 sudo su - jenkins
 sudo chown -R jenkins:jenkins /var/lib/jenkins
 sudo chmod 666 /var/run/docker.sock
 sudo usermod -a -G docker jenkins
 sudo usermod -a -G docker ubuntu
 gcloud auth login
 vi cred.json
  ls
 gcloud auth activate-service-account demo14@able-decorator-354310.iam.gserviceaccount.com --key-file=cred.json
 gcloud auth configure-docker
 ls
 cat cred.json 
 --------------------------------------------------------------------------------------------------------------------------
 
 Install jenkins 
-------------------

To install Jenkins on Ubuntu, follow below set of commands:

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | 
  sudo apt-key add -

sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > \
/etc/apt/sources.list.d/jenkins.list'

sudo apt-get update
sudo apt-get install jenkins -y
sudo service jenkins start
sudo service jenkins status


follow this document to install jenkins
https://www.liquidweb.com/kb/installing-jenkins-on-ubuntu-16-04/ 

If you’re facing with above jenkins installation. Please follow below link
https://serverfault.com/questions/1034893/installing-jenkins-on-ubuntu-tells-me-package-jenkins-has-no-installation-can


Install Sonarqube
------------------

  cd /opt
  sudo curl -O https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-8.3.0.34182.zip
  sudo apt-get install unzip
  sudo unzip sonarqube-8.3.0.34182.zip -d /opt/
  sudo mv /opt/sonarqube-8.3.0.34182/ /opt/sonarqube
  cd /opt/sonarqube/
  sudo groupadd sonar
  sudo useradd -c "SonarQube - User" -d /opt/sonarqube/ -g sonar sonar
  sudo chown sonar:sonar /opt/sonarqube/ -R
  
  sudo vim /opt/sonarqube/conf/sonar.properties
  
  ####Un-comment these lines and modify them as necessary.

   sonar.jdbc.username=admin
   sonar.jdbc.password=admin

  vim /etc/systemd/system/sonarqube.service
  
  ####Add this content into the “sonarqube.service” file.

[Unit]
Description=SonarQube service
After=syslog.target network.target

[Service]
Type=forking

ExecStart=/opt/sonarqube/bin/linux-x86-64/sonar.sh start
ExecStop=/opt/sonarqube/bin/linux-x86-64/sonar.sh stop

User=sonar
Group=sonar
Restart=always

LimitNOFILE=65536
LimitNPROC=4096


[Install]
WantedBy=multi-user.target


  systemctl daemon-reload 
  systemctl enable sonarqube.service
  systemctl start sonarqube.service
  systemctl status -l sonarqube.service


Install nexus
------------------

1) wget http://download.sonatype.com/nexus/3/nexus-3.22.0-02-unix.tar.gz
2) sudo tar -xvf nexus-3.22.0-02-unix.tar.gz 
3) mv nexus-3.22.0-02 /opt/
4) mv sonatype-work/ /opt/
5) cd /opt
6) mv nexus-3.22.0-02/ nexus
7) ###Create a user called Nexus####
     sudo adduser nexus

8) Give permission to Nexus user
sudo chown -R nexus:nexus /opt/nexus
sudo chown -R nexus:nexus /opt/sonatype-work

9) sudo vim /opt/nexus/bin/nexus.rc
    run_as_user="nexus"
 
10)Modify memory settings
  sudo vim /opt/nexus/bin/nexus.vmoptions
  change to 512m

11) Configure Nexus to run as a service
      sudo vim /etc/systemd/system/nexus.service
       Copy the below content.
       
[Unit]
Description=nexus service
After=network.target
[Service]
Type=forking
LimitNOFILE=65536
User=nexus
Group=nexus
ExecStart=/opt/nexus/bin/nexus start
ExecStop=/opt/nexus/bin/nexus stop
User=nexus
Restart=on-abort
[Install]
WantedBy=multi-user.target

Now Start Nexus
     sudo systemctl enable nexus
     sudo systemctl start nexus
     sudo systemctl status nexus

tail -f /opt/sonatype-work/nexus3/log/nexus.log

https://epma.medium.com/install-sonatype-nexus-3-on-ubuntu-20-04-lts-562f8ba20b98