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installtion_guide_ubuntu.md

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JAVA 8 installation in ubuntu 16.04

  • sudo apt-get -y install default-jdk

JAVA 8 installation in ubuntu 18.04

  • sudo apt update
  • sudo apt install openjdk-8-jdk openjdk-8-jre
  • set path
cat >> /etc/environment <<EOL
JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
JRE_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre
EOL

execute command - sudo update-alternatives --config java ( select which ever java version you need )

Java 11 ( open JDK )

  • sudo add-apt-repository ppa:openjdk-r/ppa
  • sudo apt-get update
  • sudo apt install openjdk-11-jdk

JAVA 11 installation in ubuntu 16.04

  • sudo add-apt-repository ppa:linuxuprising/java
  • sudo apt update
  • sudo apt-get install oracle-java11-installer
  • sudo apt-get install oracle-java11-set-default ( to set java 11 as default )
  • java -version ( verify java installation )

for more details - https://tecadmin.net/install-oracle-java-11-on-ubuntu-16-04-xenial/

JAVA 11 installation in GCP machine

git installation in ubuntu 16.04

  • apt-get update
  • apt-get install git
  • git --version ( to verify git version )

Jenkins installation in ubuntu 16.04

Jenkins as a service

maven installation in ubuntu 16.04

  • cd /usr/local

  • wget https://downloads.apache.org/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz

  • sudo tar xvf apache-maven-3.6.3-bin.tar.gz

  • ln -s apache-maven-3.6.3 apache-maven

  • sudo vi /etc/profile.d/apache-maven.sh

     please insert below lines to /etc/profile.d/apache-maven.sh
 
   export JAVA_HOME=/usr/lib/jvm/java-11-oracle
   export M2_HOME=/usr/local/apache-maven
   export MAVEN_HOME=/usr/local/apache-maven
   export PATH=${M2_HOME}/bin:${PATH}

  • source /etc/profile.d/apache-maven.sh

  • mvn -version ( to verify maven version )

For more details https://tecadmin.net/install-apache-maven-on-ubuntu/

easy way to install - sudo apt install maven

Docker installation in ubuntu 16.04

  • sudo apt-get update
  • sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
  • curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
  • sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
  • sudo apt-key fingerprint 0EBFCD88
  • sudo apt-get update
  • sudo apt-get install docker-ce docker-ce-cli containerd.io ( to install latest version )
  • sudo docker run hello-world

if you want all the things in a script use https://github.com/DeekshithSN/cheatsheet/blob/master/docker-install.sh

for more details refer https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-docker-ce-1

    If you face below problem which is same as mentione below the you can refer this link

   https://stackoverflow.com/questions/25183063/docker-on-rhel-6-cgroup-mounting-failing

   Starting cgconfig service: Error: cannot create directory /cgroup/blkio
    /sbin/cgconfigparser; error loading /etc/cgconfig.conf: Cgroup, operation not allowed
   Failed to parse /etc/cgconfig.conf                         [FAILED]

   After doing this you need run all the commands with sudo concatenated to it.

    - To solve this issue we need to add current user to docker group , to do the same follow the below commands 
      sudo groupadd docker
      sudo usermod -aG docker $USER ( got a error while runing docker commands with the current user)
      sudo usermod -aG docker jenkins (got a error while runing docker commands with jenkins user )
      getent group <groupname> (to check the list of users in particular group)
      sudo passwd jenkins to change password of jenkins user
    
    - even after following the above commands if you face any issue in ruuning commands then run below command
      chmod 777 /var/run/docker.sock

SonarQube Installation in ubuntu 16.04

Use apt-get to install the required packages.

  • apt-get update
  • apt-get install unzip software-properties-common wget default-jdk

Install the PostgreSQL database service.

  • apt-get install postgresql postgresql-contrib

Access the Postgres database service command-line.

  • su - postgres
  • psql

Create a Postgres user named sonarqube,Create a Postgres database named sonarqube. Give the PostgreSQL user named sonarqube permission over the database named sonarqube

  • CREATE USER sonarqube WITH PASSWORD 'password';
  • CREATE DATABASE sonarqube OWNER sonarqube;
  • GRANT ALL PRIVILEGES ON DATABASE sonarqube TO sonarqube;
  • \q

Download the Sonarqube package and move it to the OPT directory.

Create a new Linux account named sonarqube, Set the correct file permission on the sonarqube directory.

  • adduser --system --no-create-home --group --disabled-login sonarqube
  • chown -R sonarqube:sonarqube /opt/sonarqube

Edit the sonar.sh configuration file.

  • vi /opt/sonarqube/bin/linux-x86-64/sonar.sh

Configure the following options:

  • RUN_AS_USER=sonarqube

Edit the sonar.properties configuration file.

  • vi /opt/sonarqube/conf/sonar.properties

Configure the following options:

  sonar.jdbc.username=sonarqube
  sonar.jdbc.password=password
  sonar.jdbc.url=jdbc:postgresql://localhost/sonarqube
  sonar.web.javaAdditionalOpts=-server
  sonar.web.host=0.0.0.0

Create a Linux configuration file named 99-sonarqube.conf

  • vi /etc/security/limits.d/99-sonarqube.conf

Here is the content of the 99-sonarqube.conf file.

sonarqube   -   nofile   65536
sonarqube   -   nproc    4096

Edit the sysctl.conf configuration file.

  • vi /etc/sysctl.conf

Add the following lines at the end of the sysctl.conf file.

  vm.max_map_count=262144
  fs.file-max=65536

Reboot your computer to enable the new configuration

  • reboot

Start the Sonarqube service.

  • /opt/sonarqube/bin/linux-x86-64/sonar.sh start

Use the following command to monitor the SonarQube log.

  • tail -f /opt/sonarqube/logs/sonar.log

for more deatils refer - https://techexpert.tips/sonarqube/sonarqube-installation-ubuntu-linux/

you want to create sonarqube through docker then use below command

docker run -d -p 9000:9000 sonarqube:lts

JFROG Artifactory installation in ubuntu 16.04 using docker container

  • export JFROG_HOME= /set/some/path

  • mkdir -p $JFROG_HOME/artifactory/var/etc/

  • cd $JFROG_HOME/artifactory/var/etc/

  • touch ./system.yaml

  • chown -R 1030:1030 $JFROG_HOME/artifactory/var

    run below docker command

    docker run --name artifactory -v $JFROG_HOME/artifactory/var/:/var/opt/jfrog/artifactory -d -p 8081:8081 -p 8082:8082 docker.bintray.io/jfrog/artifactory-oss:latest

Ansible Installation in ubuntu 16.04

  • sudo apt-add-repository ppa:ansible/ansible
  • sudo apt-get update
  • sudo apt-get install ansible

For more details - https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-ansible-on-ubuntu-16-04

kubernetes installation on ubuntu 16.04 ( kubeadm - single master multi nodes )

Make sure docker installed in master and nodes, make sure master has 2 cpu's

Execute below commands in both master and node

for more details https://kubernetes.io/docs/setup/independent/install-kubeadm/

Execute below commands in master

after executing this command you will get node's joining command, copy and paste it somewhere

Execute join command in node, which may look like as mentioned below

   kubeadm join 10.128.0.8:6443 --token q915fe.do2ty6a8ow6qjixt \
   --discovery-token-ca-cert-hash sha256:acd137106e6b763d1ca6b5a4f7c1b1538c2ee8af81e47f9ea3f385c66cd710b3

Then to verify use below commands

  • kubectl get nodes
  • kubectl get pods
  • Kubectl get service

Nexus Installation in ubuntu 16.04

  • apt-get install wget ( install if you dont have wget )
  • java -version ( make sure java is installed which should be java 8 or higher version )
  • wget https://download.sonatype.com/nexus/3/latest-unix.tar.gz
  • tar -xvf latest-unix.tar.gz
  • cd nexus-3.35.0-02/bin
  • ./nexus start ( starts the nexus artifactory )
  • ./nexus status ( by this you check the status of nexus artifactory )
  • To access this use http://ip_Address:8081 ( by deafault which will be running on 8081)

intial password will be present in /opt/sonatype-work/nexus3/admin.password

using docker

docker run -d -p 8081:8081 --name nexus sonatype/nexus3

Helm Installation in ubuntu 16.04

installing kubeadm on GCP machines

Install kubelet, kubeadm and kubectl

add Kubernetes repository for Ubuntu 20.04 to all the servers.

sudo apt update
sudo apt -y install curl apt-transport-https
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

Then install required packages.

sudo apt update
sudo apt -y install vim git curl wget kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl

Confirm installation by checking the version of kubectl.

kubectl version --client && kubeadm version

Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.2", GitCommit:"8b5a19147530eaac9476b0ab82980b4088bbc1b2", GitTreeState:"clean", BuildDate:"2021-09-15T21:38:50Z", GoVersion:"go1.16.8", Compiler:"gc", Platform:"linux/amd64"}
kubeadm version: &version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.2", GitCommit:"8b5a19147530eaac9476b0ab82980b4088bbc1b2", GitTreeState:"clean", BuildDate:"2021-09-15T21:37:34Z", GoVersion:"go1.16.8", Compiler:"gc", Platform:"linux/amd64"}

Disable Swap

Turn off swap.

sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
sudo swapoff -a

Enable kernel modules and configure sysctl.

Enable kernel modules

sudo modprobe overlay
sudo modprobe br_netfilter

Add some settings to sysctl

sudo tee /etc/sysctl.d/kubernetes.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF

Reload sysctl

sudo sysctl --system

Install Container runtime

Installing Docker runtime:

Add repo and Install packages

sudo apt update
sudo apt install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt update
sudo apt install -y containerd.io docker-ce docker-ce-cli
Create required directories
sudo mkdir -p /etc/systemd/system/docker.service.d
Create daemon json config file
sudo tee /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF
Start and enable Services
sudo systemctl daemon-reload 
sudo systemctl restart docker
sudo systemctl enable docker
Ensure you load modules
sudo modprobe overlay
sudo modprobe br_netfilter
Set up required sysctl params
sudo tee /etc/sysctl.d/kubernetes.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
Reload sysctl
sudo sysctl --system

Initialize master node

Login to the server to be used as master and make sure that the br_netfilter module is loaded:

lsmod | grep br_netfilter

Enable kubelet service.

sudo systemctl enable kubelet

Initialize kubeadm

kubeadm init

Configure kubectl using commands in the output:

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

Additional nodes can be added using the command in installation output:

kubeadm join k8s-cluster.computingforgeeks.com:6443 --token sr4l2l.2kvot0pfalh5o4ik \
    --discovery-token-ca-cert-hash sha256:c692fb047e15883b575bd6710779dc2c5af8073f7cab460abd181fd3ddb29a18 \
    --control-plane

Install network plugin on Master

In this we’ll use Calico. You can choose any other supported network plugins.

curl https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/calico.yaml -O
kubectl apply -f calico.yaml

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml --> might not work

Issues

problem:

[init] Using Kubernetes version: v1.26.1
[preflight] Running pre-flight checks
error execution phase preflight: [preflight] Some fatal errors occurred:
        [ERROR CRI]: container runtime is not running: output: time="2023-02-26T16:02:00Z" level=fatal msg="validate service connection: CRI v1 runtime API is not implemented for endpoint \"unix:///var/run/containerd/containerd.sock\": rpc error: code = Unimplemented desc = unknown service runtime.v1.RuntimeService"
, error: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

sol: https://programmerall.com/article/99842435629/