Sonarqube memory error - There is insufficient memory for the Java Runtime Environment to continue

There is insufficient memory for the Java Runtime Environment to continue.

If you have any errors in sonarQube like below:

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 37531648 bytes for committing reserved memory.


Please apply below fix highlighted in yellow for any memory issus in SonarQube


The fix should be applied in sonar.properties file. you need to add below lines in appropriate places.

1. Login to SonarQube using GitBash or ITerm
2. open the below file and make the changes highligted in yellow color.
sudo vi /opt/sonarqube/conf/sonar.properties

#--------------------------------------------------------------------------------------------------
# WEB SERVER
# Web server is executed in a dedicated Java process. By default heap
size is 512Mb.
# Use the following property to customize JVM options.
#    Recommendations:
#
sonar.web.javaOpts=-Xmx512m -Xms512m -XX:+HeapDumpOnOutOfMemoryError
#--------------------------------------------------------------------------------------------------
# COMPUTE ENGINE
# The Compute Engine is responsible for processing background tasks.
# Compute Engine is executed in a dedicated Java process. Default heap
size is 512Mb.
# Use the following property to customize JVM options.
#    Recommendations:
sonar.ce.javaOpts=-Xmx512m -Xms512m -XX:+HeapDumpOnOutOfMemoryError

DevOps Interview questions - Top DevOps Interview questions - Latest DevOps Interview Questions - Part 2

Please find more DevOps interview questions..

1. What is Test Driven Development? How will you implement TDD?
2. What is the difference between Agile and DevOps?
3. What are the tools you integrated in pipeline you build?
4. What are the different plug-ins you used in Jenkins?
5. What is microservices? How will you create microservices?
6. How will you dockerize an application? What are the steps?
7. Have you configured webhooks in ? How will you do it?
8. What is Jenkinsfile?
9. What are the DevOps tools you have used?
10. Why Git is distributed version control system?
11. How will you set up communication between two systems without password but secure way?
12. What do you understand by “Infrastructure as code”? 

Install TeamCity on Ubuntu with MySQL

Please find steps involved in installing TeamCity on Ubuntu server with MySQL:

Here below are the steps:

Java Installation
sudo apt-get update
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer -y

Teamcity Installation
First download the teamcity latest version.
sudo wget https://download.jetbrains.com/teamcity/TeamCity-2017.2.3.tar.gz
tar xfz TeamCity-2017.2.3.tar.gz
sudo mkdir /opt/jetbrains
sudo mv TeamCity/ /opt/jetbrains
sudo useradd teamcity

sudo vi /etc/init.d/teamcity
#!/bin/sh
# /etc/init.d/teamcity -  startup script for teamcity
export TEAMCITY_DATA_PATH="/opt/jetbrains/TeamCity/.BuildServer"
export TEAMCITY_SERVER_OPTS=-Djava.awt.headless=true # Configure TeamCity for use on a headless OS.

case $1 in
start)
 start-stop-daemon --start  -c teamcity --exec /opt/jetbrains/TeamCity/bin/runAll.sh start
;;

stop)
 start-stop-daemon --start -c teamcity  --exec  /opt/jetbrains/TeamCity/bin/runAll.sh stop
;;

esac

exit 0

sudo update-rc.d teamcity enable
sudo update-rc.d teamcity defaults
sudo chmod +x /etc/init.d/teamcity
sudo apt-get remove insserv -y
sudo apt install procps
sudo update-rc.d teamcity defaults
sudo chown -R ubuntu:ubuntu /opt/jetbrains/TeamCity
sudo service teamcity start
Open browser and access teamcity home page
http://server_ip:8111/

Click on Proceed
Now stop the Teamcity server
sudo service teamcity status
sudo service teamcity stop


MySQL Installation
TeamCity needs a database to run. You have options to choose Postgres, MySQL or any database.
Let us try with MySQL.

sudo apt-get install mysql-server -y
enter a password for default user root and repeat the password
sudo mysql -u root -p
Now execute all the commands:
create database teamcity character set UTF8 collate utf8_bin;
Use teamcity;
create user 'teamcityuser'@'localhost' identified by 'password';
grant all privileges on teamcity.* to 'teamcityuser'@'localhost';

type exit to come out

Download MySQL JDBC driver

sudo wget http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.31.tar.gz -O mysql-connector.tar.gz
sudo tar zxvf mysql-connector.tar.gz
cd mysql-connector-java-5.1.31/
sudo mv mysql-connector-java-5.1.31-bin.jar /opt/jetbrains/TeamCity/.BuildServer/lib/jdbc/

cd /opt/jetbrains/TeamCity/.BuildServer/lib/jdbc
mv ? mysql-connector-java-5.1.31-bin.jar
sudo chown -R teamcity:teamcity /opt/jetbrains/TeamCity
sudo chown teamcity:teamcity /opt/jetbrains/TeamCity/.BuildServer/lib/jdbc/mysql-connector-java-5.1.31-bin.jar
sudo service teamcity start
Open browser, type http://serverip:8111/
Click proceed and select MySQL as database type
Click on Proceed
enter database name as teamcity
user as teamcityuser
password as password
leave host as it is
Click on Proceed
Agree the License agreement

DevOps Interview Questions - Part I - Basic DevOps Interview Questions

Please find DevOps Interview questions asked during the interview:

They are simple but we should be able to answer them convincingly.

1. Tell us about yourself..
2. Tell us about your Devops role in your existing project.
3. What is Devops about your perspective ?
4. What are the challenges you faced from DevOps perspective?
5. What is the team size?
6. What are your day to day activities?
7. How do you troubleshoot in case of any errors?
8. Tell me about your Devops tools experience or what are the Devops tools you worked on?
9. Walk us through stages of pipeline you created in Jenkins.
10. What was the difficult challenge you faced and how did you overcome?
11. What is the difference between Git and any other version control systems?
12. What is the difference between Continuous Delivery and Continuous Deployment?

How to set up TeamCity on Ubuntu 16.0.4? Install Teamcity on Ubuntu 16.0.4

Please find below steps for installing TeamCity on Ubuntu:

Pre-requistes:
Make sure instance has at least 2 GB RAM memory(for EC2 at least small instance)
Open port 8111 in security firewall.

We need to set up some database for storing all the build information. For this exercise, lets us use Postgres:

Postgres Installation
sudo apt-get update
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'
sudo wget -q https://www.postgresql.org/media/keys/ACCC4CF8.asc -O - | sudo apt-key add -
sudo apt-get -y install postgresql postgresql-contrib

sudo systemctl enable postgresql
sudo systemctl start postgresql

Change the password for postgres user by entering below command
sudo passwd postgres
Enter any password but do remember the password and confirm the same password
su - postgres
createuser teamcity

Switch to sql shell by entering
psql
ALTER USER teamcity WITH ENCRYPTED password 'password';
CREATE DATABASE teamcity OWNER teamcity;
\q

type exit to come out of postgres user.

TeamCity Installation

sudo apt-get update
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer -y
Say OK
Say Yes by pressing <— button and enter
wget https://download.jetbrains.com/teamcity/TeamCity-2017.1.2.tar.gz
tar -xvf TeamCity-2017.1.2.tar.gz
sudo mkdir /opt/JetBrains
sudo mv TeamCity /opt/JetBrains/TeamCity
cd /opt/JetBrains/TeamCity
sudo nano /etc/init.d/teamcity
(copy the whole text colored in green)
#!/bin/sh
### BEGIN INIT INFO
# Provides:          TeamCity autostart
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start teamcity daemon at boot time
# Description:       Enable service provided by daemon.
# /etc/init.d/teamcity -  startup script for teamcity
### END INIT INFO

#  Ensure you enter the  right  user name that  TeamCity will run  under
USER="ubuntu"

export TEAMCITY_DATA_PATH="/opt/JetBrains/TeamCity/.BuildServer"

case $1 in

start)
  start-stop-daemon --start  -c $USER --exec /opt/JetBrains/TeamCity/bin/runAll.sh start
 ;;
stop)
  start-stop-daemon --start -c $USER  --exec  /opt/JetBrains/TeamCity/bin/runAll.sh stop
 ;;
 esac

exit 0

Ctrl + O enter
Ctrl + X enter
sudo chmod +x /etc/init.d/teamcity
sudo update-rc.d teamcity defaults
sudo /etc/init.d/teamcity start

cat /opt/JetBrains/TeamCity/buildAgent/logs/teamcity-agent.log

Open browser and access team city url in the browser
http://public_dns_name:8111

Click on Proceed.
Select database type as jdbc driver as Postgres SQL, now you need to download the jdbc driver at below location.
cd /opt/JetBrains/TeamCity/.BuildServer/lib/jdbc
sudo wget https://jdbc.postgresql.org/download/postgresql-9.4.1212.jar

Select database type PostgreSQL in the browser.
Refresh JDBC driver
You should see like this —> Loaded PostgreSQL JDBC driver version: 9.4

Now provide the below info
Enter database Host - localhost
Enter database name - teamcity
User name - teamcity
Password - password
Click on Proceed

please wait and watch..As It may take a few mins…

Scroll down the page, Accept license agreement
Uncheck Send anonymous usage statistics
Continue button

Register as a user and create an account.

DevOps BootCamp by Coach AK on AWS and Azure Cloud Computing Online Classes | June/July 2023 Schedule

Are you in IT? Tired of your work? Are you not able to make any good progress in your career? 

Are you not having a job? Looking for a break in IT? Are you interested in learning DevOps? 

 

Did you get laid off from your previous job due to Covid-19? 

 

You are in the right place to kick start your career in DevOps. DevOps is one of the top and hot IT skills right now. Currently almost all the employers are struggling to get right resources in their teams who can do the DevOps and automation work..You could be that person by attending this coaching program.

DevOps Coaching Classes schedules for June/July 2023(currently enrollment is going on)

Date	Time	Type	When?
June 24th	09:45 AM CST to 11:30 AM on Saturdays 10:30 AM CST to 12:30 PM CST on Sundays	Weekends	Sat/Sundays
July 27th	6:00 to 8:00 PM CST	Weekdays	Tuesdays/Thursdays

DevOps Coaching Highlights:

- Comprehensive hands on knowledge on Git, Jenkins, Maven, SonarQube, Nexus, Terraform, Ansible, Docker, Kubernetes, AWS IAM, ECR, Docker registry. AWS and Azure cloud platforms.

- Coach is having about 23+ yrs of professional IT experience, 9+ Yrs in DevOps/Cloud/Automation.

- Many students already got placed in reputed companies from this coaching program successfully.

- Working as a Sr.DevOps Coach/Architect in a one of the top IT services companies in USA.

- Unique program...less theory, more hands on lab exercises...

 
- Resume preparation will be done with candidates personally.

- One-to-one Interview coaching.

- Coaching is purely hands on with 101% job relevant.

- 100% Job assistance.

- Coached about 1500+ students successfully for past five years and many of my students got placed with many large enterprises in DFW, Charlotte, Houston, Austin, Chicago, Florida, Seattle, Bay area, Ohio, NJ and NY areas..

To join coaching classes, please contact Coach AK below through email or phone number:

Contact no # : +1(469)733-5248
Email id: devops.coaching@gmail.com
Contact: Coach AK