-GIT Commands: -Jenkins:
ssh-keygen -t rsa -C “sathishkumarpkd@gmail.com” gedit id_rsa.pub
sathishkumarpkd@sathishkumarpkd:~/devops-simpliLesson2$ /home/sathishkumarpkd/.ssh/id_rsa
curl wgetip.com mkdir gitrepo cd gitrepo/ ls -lart git init ls -lart ls -lart .git/
//Roll back entire directory git reset --hard //Roll back git checkout //Roll back git revert 9d378bf78495c1f3aabd78e7bf //Roll back : and removed form History. git reset --hard git log
//Create develop branch from default master. // edit the file and commit to develop branch. git branch -l git branch develop git checkout develop git branch -l git log echo "Develop Branch" >> README.txt cat README.txt git add README.txt git commit -m "Develop Commit" git log
//switch to master branch, and merge code from develop branch git checkout master git branch -l git log git merge develop git log
// with github push, push to remote repo. git remote add origin https://github.com/sathishkumarpkd/sample.git git push -u origin master
//git pull origin master git pull origin master
git tag v1.0 git tag -l git push --tags
//Jenkins installation. url:https://pkg.jenkins.io/debian-stable/
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add - echo "deb https://pkg.jenkins.io/debian-stable binary/" > /etc/apt/sources.list.d/jenkins.list apt update apt install openjdk-8-jdk apt install jenkins service jenkins status service jenkins restart (In case service is not active)
curl wgetip.com http://104.43.195.118:8080/ cat /var/lib/jenkins/secrets/initialAdminPassword dde984ded38442c4972b300002de32c1
//Jenkins
git clone https://github.com/anujdevopslearn/MavenBuild.git cd MavenBuild/ apt install maven mvn clean mvn clean install
// after forking from trainer https://github.com/sathishkumarpkd/MavenBuild.git
//Payload URL in GitHub for webhook http://40.122.34.228:8080/github-webhook/
// Secret token generated in Jenkins.(admin->configure->generatetoken with GitHub) 111e3b3435d4294ad530134138fe178209
//for practice https://github.com/jitpack/maven-simple from Anuj Sharma to All Participants: // Jenkins pipeline. https://github.com/jenkins-docs/simple-java-maven-app https://github.com/jenkinsci/pipeline-examples/tree/master/jenkinsfile-examples
//Junit https://github.com/jitpack/maven-simple https://github.com/jitpack/maven-simple.git Lesson4 demo for Cucumebr config.
//Ansible sudo apt-get install software-properties-common sudo apt-add-repository ppa:ansible/ansible sudo apt-get update sudo apt-get install ansible ansible --version cd /etc/ansible vi ansible.cfg 42006 : edit remote port for simplilearn in ansible.cfg.
https://github.com/anujdevopslearn/InterviewQuestions/blob/master/InstallationGuides/Ansible.txt //centos local installation. https://www.linuxtechi.com/manage-windows-host-using-ansible/
cat ansible.cfg | grep 42006 remote_port = 42006
//dynamic ip addr on host: https://github.com/sermilrod/ansible-dynamic-inventory
vi /etc/ansible/hosts uncomment following servers : Grouped and Ungrouped.
green.example.com
[webservers] alpha.example.org beta.example.org
[dbservers] db01.intranet.mydomain.net
//cat hosts : to show the edits done // perform the ping operations: it should fail. ansible -m ping webservers ansible -m ping dbservers ansible -m ping green.example.com ansible -m ping green.example.com1
//failed ping green.example.com | UNREACHABLE! => { "changed": false, "msg": "Failed to connect to the host via ssh: ssh: Could not resolve hostname green.example.com: Name or service not known", "unreachable": true
//to make it pass key has to be generated and add that key to client in authorized_keys
// generate key ssh-keygen -t rsa ls -lart /root/.ssh/
// public key //cat /root ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC3sjPlyCp3U1nYmPWhCKJbkxjVYg0twnRExG71yI5C2/wwvvsVHhoIrIF/e+xKbX23LblLidL8F78CYed2vSpQYnOjJmyPTEjGRP9G8cMt63gajKiDixrf4OQRftAbPc3uhrjHwn8Q3OJMF6ERM59JiQPDAKMalx90KeLzHePX4/i3jVo6FwM2r59kOSooIuFovKDD6A7E693d0PPZCpjuB2h13jceoJ5xW3aj/+ZgNtbxClJ2AVaMzk1LjEoyRSjvvFFboAhQgGjfRSOgEfdw8xPj5DkJD3W4GFLhFz9v8P7MYU1vsjOn06h6qF+3uuY+CCMENDYl3r6jHybZvCX/ root@sathishkumarpkd
// on same machine server client. // copy the pub key(from master) to authorized_keys(client) // here its same machine, cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys ssh -p 42006 localhost "hostname" // returns sathishkumarpkd
// edit the hosts vi /etc/ansible/hosts add localhost . and execute : ansible -m ping localhost // returns success.
//launchpad.net/ansible // diffreent modules and categories https://docs.ansible.com/ansible/latest/modules/modules_by_category.html
//ansible module demo. //get yml file(playbook) from git //this will install apache server in local host. //this local host was saved in hosts.config earlier, under webserver group. //in real time, all the servers are to be mentioned in webserver group.
wget https://gist.githubusercontent.com/anujdevopslearn/8395705058c9cd4f4f5c3fec5591b246/raw/ca103bfd5a8791c805aaed30efc9c2cb192e7e72/apache.yml ansible-playbook apache.yml
//Instead of chnaging ansible.cfg for remote port and user, we can update in hosts.cfg. localhost ansible_port=42006 ansible_user=root(or any user like root permission)
//adhoc commands for single line execution: // This is used instead of playbook ansible -m shell -a "service apache2 status" webservers ansible -m shell -a "apt -y install dos2unix" webservers
// mysql installation. wget https://gist.githubusercontent.com/anujdevopslearn/98a73c0ef7f72a70fc11759f8b2b9c25/raw/344bd206c7dbadfd56f32dc755c06e450c9b0d0f/mysql.yml ansible-playbook mysql.yml ansible -m shell -a "service apache2 status" webservers
// for autoscaling in AWS https://github.com/sermilrod/ansible-dynamic-inventory
// for tomcat installation wget https://gist.githubusercontent.com/anujdevopslearn/efa28700a3b8aca18d2866aa2d24fa02/raw/a48022c9b6111a668fcc9f3f3c63928ea2840db0/TomcatInstallation.yml ansible-playbook TomcatInstallation.yml ansible -m shell -a "service tomcat status" webservers
//ansible module for docker https://docs.ansible.com/ansible/2.6/modules/list_of_cloud_modules.html#docker
//Docker apt update apt install docker.io service docker restart docker version docker pull ubuntu docker images docker rmi ubuntu:18.04 // remove image
// run the container,the root user at Host machine will be changed to // ubuntu container, since this is trimmed version, ot of Ubuntu commands wont work, // but we can install one by one. // root@sathishkumarpkd:~# to root@a9b325b6e811:/# docker run -it ubuntu bash // docker commands wont work inside ubuntu container.
exit
// shows this container id, which is in exit status. docker ps -a //-d detach, is diffrent from -it, as we stay in root@hostmachine itself. docker run -d jenkins // same above but,name is provided. docker run --name dev_jenkins -d jenkins
//docker exec -it sath_dev_jenkins bash //cat /var/lib/jenkins_home/secrets/initialAdminPassword
docker ps docker stop 515328e2e454 docker ps docker restart 515328e2e454 docker ps docker rm 515328e2e454 -f
// to access from outside world. // -p hostport:container port
docker run --name prod_jenkins -d -p 8080:8080 jenkins docker ps docker run --name dev_jenkins -d -p 80:8080 jenkins docker ps curl wgetip.com
// home work for Nagios installation. https://github.com/anujdevopslearn/InterviewQuestions/blob/master/InstallationGuides/CleanServices.txt Run Commands from root ID: 14-23 https://assets.nagios.com/downloads/nagiosxi/docs/Installing-Nagios-XI-Manually-on-Linux.pdf curl https://assets.nagios.com/downloads/nagiosxi/install.sh | sh
// docker build // and build an Image
git clone https://github.com/anujdevopslearn/Docker.git cd Docker/ ls -lart docker build -t customimage . docker images
////////////////////////docker file contents///////////////////////////////////////////////// //docker file contents displayed to create Custom image. cat Dockerfile FROM ubuntu
ENV DEBIAN_FRONTEND=non-interactive
RUN apt-get update -y RUN apt-get install -y git curl apache2 php libapache2-mod-php php-mysql
RUN rm -rf /var/www/html/* ADD src /var/www/html/
RUN a2enmod rewrite RUN chown -R www-data:www-data /var/www/html ENV APACHE_RUN_DIR /var/www/html ENV APACHE_RUN_USER www-data ENV APACHE_RUN_GROUP www-data ENV APACHE_LOG_DIR /var/log/apache2
EXPOSE 80
CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"] /////////////////////////end of docker file contents///////////////////////////////////////////////// //docker images built by above docker file. docker images REPOSITORY TAG IMAGE ID CREATED SIZE customimage latest 9c5e2eaf53ac 46 seconds ago 269MB ubuntu latest 1d622ef86b13 27 hours ago 73.9MB ////////////////////////////////end of docker images built by above docker file.//////////////////////
// run docker run -d -p 8081:80 customimage //http://localhost:8081/ : this will accessed inside VM.
//Assignment https://github.com/anujdevopslearn/AspDotNetDocker.git
//Docker compose install
curl -L "https://github.com/docker/compose/releases/download/1.25.5/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose
//execute docker compose git clone https://github.com/anujdevopslearn/DockerCompose.git cd DockerCompose/ ls -alrt cat Dockerfile mvn clean install -Dmaven.test.skip=true ls -alrt target docker-compose up -d docker images docker ps -a
/////////////////////////////////////docker-compose.yml//////////////////////////////////////////////////////// cat docker-compose.yml version: '3'
services: db: image: mysql:5.7 environment: - MYSQL_ROOT_PASSWORD=root123 - MYSQL_DATABASE=spring_app_db - MYSQL_USER=app_user - MYSQL_PASSWORD=test123
spring-boot-jpa-app: image: spring-boot-jpa-image build: context: ./ dockerfile: Dockerfile depends_on: - db ports: - 8087:8080
//////////////////////////////////////end of docker-compose.yml///////////////////////////////////////////////// //docker file in compose eg: cat Dockerfile FROM ubuntu:18.04
RUN apt -y update && apt -y install openjdk-8-jdk maven apache2 WORKDIR /app
COPY . /app
EXPOSE 8080 LABEL maintainer=“chathuranga.t@gmail.com” ADD ./target/spring-boot-data-jpa-example-0.0.1-SNAPSHOT.jar spring-boot-data-jpa-example-0.0.1-SNAPSHOT.jar ENTRYPOINT ["java","-jar","spring-boot-data-jpa-example-0.0.1-SNAPSHOT.jar"] ///////////////////////////////////end of docker file in compose eg://////////////////////////////////////////
// Nagios monitoring DB // Mysql is running in docker docker run -d --name mysql -e MYSQL_ROOT_PASSWORD=password mysql // not in pubic access docker inspect mysql | grep IPAddress
//Kubernetes installation https://github.com/anujdevopslearn/InterviewQuestions/blob/master/InstallationGuides/CleanServices.txt 28-30 https://github.com/anujdevopslearn/InterviewQuestions/blob/master/InstallationGuides/Kubernetes.txt 3-19
//Kube cheat sheet. http://m76.eu/cheatsheet-kubernetes-A4.pdf
//pull bootcamp image from docker hub kubectl run kubernetes-bootcamp --image=docker.io/jocatalin/kubernetes-bootcamp:v1 --port=8080 kubectl get deployments kubectl get pods ////////////////////////////////////////////////////////////////// kubectl get deployments //get deployments NAME READY UP-TO-DATE AVAILABLE AGE kubernetes-bootcamp 1/1 1 1 51s
kubectl get pods // get pods NAME READY STATUS RESTARTS AGE kubernetes-bootcamp-7dc9765bf6-4n9fm 1/1 Running 0 67s
//////////////////////////////////////////////////////////////// // kubectl run kubernetes-jenkins --image=docker.io/jenkins:latest --port=8080 kubectl run kubernetes-nginx --image=docker.io/nginx --port=80
//get pods kubectl get pods kubectl describe pod kubernetes-bootcamp-7dc9765bf6-dfjzg // get ip kubectl get pods -o wide
///////////////////////////////////Console output//////////////////// //kubectl describe pod kubernetes-bootcamp-7dc9765bf6-4n9fm Name: kubernetes-bootcamp-7dc9765bf6-4n9fm Namespace: default Priority: 0 Node: sathishkumarpkd/10.0.1.4 Start Time: Sun, 26 Apr 2020 06:02:35 +0000 Labels: pod-template-hash=7dc9765bf6 run=kubernetes-bootcamp Annotations: Status: Running IP: 10.32.0.4 Controlled By: ReplicaSet/kubernetes-bootcamp-7dc9765bf6 Containers: kubernetes-bootcamp: Container ID: docker://0dec7ab466b939c4f321648890d46d0b977f3866546c52a1a7dd36d1fcfa0c94 Image: docker.io/jocatalin/kubernetes-bootcamp:v1 Image ID: docker-pullable://jocatalin/kubernetes-bootcamp@sha256:0d6b8ee63bb57c5f5b6156f446b3bc3b3c143d233037f3a2f00e279c8fcc64af Port: 8080/TCP Host Port: 0/TCP State: Running Started: Sun, 26 Apr 2020 06:02:57 +0000 Ready: True Restart Count: 0 Environment: Mounts: /var/run/secrets/kubernetes.io/serviceaccount from default-token-fk4c2 (ro) Conditions: Type Status Initialized True Ready True ContainersReady True PodScheduled True Volumes: default-token-fk4c2: Type: Secret (a volume populated by a Secret) SecretName: default-token-fk4c2 Optional: false QoS Class: BestEffort Node-Selectors: Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s node.kubernetes.io/unreachable:NoExecute for 300s Events: Type Reason Age From Message
Normal Scheduled 15m default-scheduler Successfully assigned default/kubernetes-bootcamp-7dc9765bf6-4n9fm to sathishkumarpkd Normal Pulling 15m kubelet, sathishkumarpkd Pulling image "docker.io/jocatalin/kubernetes-bootcamp:v1" Normal Pulled 15m kubelet, sathishkumarpkd Successfully pulled image "docker.io/jocatalin/kubernetes-bootcamp:v1" Normal Created 15m kubelet, sathishkumarpkd Created container kubernetes-bootcamp Normal Started 15m kubelet, sathishkumarpkd Started container kubernetes-bootcamp
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES kubernetes-bootcamp-7dc9765bf6-4n9fm 1/1 Running 0 16m 10.32.0.4 sathishkumarpkd ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //curl 10.32.0.4:8080 Hello Kubernetes bootcamp! | Running on: kubernetes-bootcamp-7dc9765bf6-4n9fm | v=1
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //execute and access from outside. kubectl exec -it kubernetes-bootcamp-7dc9765bf6-4n9fm bash ps -ef exit
/////////////////////////////////////////////////////////////////////////////////////////////////// //ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 06:02 ? 00:00:00 /bin/sh -c node server.js root 7 1 0 06:02 ? 00:00:00 node server.js root 25 0 0 06:30 pts/0 00:00:00 bash root 32 25 0 06:31 pts/0 00:00:00 ps -ef /////////////////////////////////////////////////////////////////////////////////////////////////////// // kubectl expose deployment/kubernetes-bootcamp --port=8080 --target-port=8080 --type=NodePort kubectl expose deployment/kubernetes-jenkins --port=8080 --target-port=8080 --type=NodePort kubectl expose deployment/kubernetes-nginx --port=80 --target-port=80 --type=NodePort // kubectl get svc
// clear kubectl get pods kubectl delete pod kubernetes-bootcamp-7dc9765bf6-4n9fm kubectl get pods curl localhost:30382 // scaling to 2 pods. kubectl scale deployments/kubernetes-bootcamp --replicas=2 // to delete all pods kubectl scale deployments/kubernetes-bootcamp --replicas=0 kubectl get pods kubectl get pods -o wide //////after scaling with 2 replicas///////////////////////////////////////////////////////////////////////////////////// kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES kubernetes-bootcamp-7dc9765bf6-bf5xx 1/1 Running 0 12m 10.32.0.5 sathishkumarpkd kubernetes-bootcamp-7dc9765bf6-tvh44 1/1 Running 0 26s 10.32.0.4 sathishkumarpkd ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// curl localhost:30382 // set image with v2 version, so pods with v1 will get deleted automatically. kubectl set image deployments/kubernetes-bootcamp kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2 kubectl rollout status deployments/kubernetes-bootcamp
//project simplilearn. https://github.com/anujdevopslearn/InterviewQuestions/tree/master/Demos https://github.com/anujdevopslearn/InterviewQuestions/blob/master/Demos/Dockerize%20Angular%20App%20-%20Solution.docx