Auto ssh from one linux instance to another remote linux server

Auto-ssh from one server to another:
--------------------------------------
Source machine:
At home location of user create .ssh dir

cd .ssh
ssh-keygen -t rsa

The above command creates a file id_rsa.pub

Dest machine:
mkdir .ssh
cd .ssh

copy the contents of id_rsa.pub  to destination server below location
vi /root/.ssh/authorized_keys

Thats it, now you should ssh without any password prompt from source machine remote instance

How to forward apache httpd webserver 80 port to any other internal ports based on web context

I have got a requirement to setup Sonar and Nexus servers in one Linux instance ( AWS EC2) where my infra team allows only port 80 to access that server from external world, so I need to look on a work around to access both servers on single port.

              Practically hosting two services with same port is not possible instead I have used Apache httpd web-server to perform the port forwarding to to the respective service based on the context provided in the web URL.

The below are the steps which I have followed to make this setup work successfully

1.  Install Sonar and Nexus as usual like stand alone or hosting on Tomcat container etc.

2.  In my current setup My sonar is running on port 9000 and Nexus is on 8081, both ports are not accessible from external world, so I did the the apache httpd setup in this instance

3.  Install apache httpd in your linux machine with the help of below command using root user.  yum install httpd

4.  open the httpd.conf file   ( /etc/httpd/conf/httpd.conf) and add below entries

<VirtualHost *:80>

  ProxyPreserveHost On

  ProxyRequests Off

  ServerName ec2-XXXXXX.compute-1.amazonaws.com

  ServerAlias ec2-XXXXXX.compute-1.amazonaws.com

  ProxyPass /nexus http://localhost:8080/nexus

  ProxyPassReverse /nexus http://localhost:8080/nexus

  ProxyPass /sonar http://localhost:9000/sonar

  ProxyPassReverse /sonar http://localhost:9000/sonar

  <Proxy *>

        Order deny,allow

        Allow from all

  </Proxy>

</VirtualHost>

5.  Now restart your apache webserver with below command

/etc/init.d/httpd restart

That’s it now you should be able access the sonar and nexus URL’s without the respective ports and with standard context as below

http://myserver.host.com/sonar

http://myserver.host.com/nexus

Regards,

Chiranjeevi Patel

Chiranjeevi.aec@gmail.com

Gitblit setup on Linux instance

****** GitBlit Setup ****

Server Setup on Linux machine
-----------------------------
1. Download the gitblit war file from below link
   http://dl.bintray.com/gitblit/releases/gitblit-1.6.2.war
 
   Downlaod JDK from below link and extract at root location (/root/jdk1.7)
   http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-i586.tar.gz
 
2. Setup a Tomcat app server on linux machine ( Tomcat7)
   -Download jdk1.7 from oracle site( google it you will get)
   -Download tomcat from below link
    http://apache.arvixe.com/tomcat/tomcat-7/v7.0.62/bin/apache-tomcat-7.0.62.tar.gz
   -Extract the tar.gz file with below command at /root/ lcoation
   - $tar -zxvf apache-tomcat-7.0.62.tar.gz
   - The above command will create a directory apache-tomcat-7.0.62, cd to this directory
     cd /root/apache-tomcat-7.0.62/bin
   - open catalina.sh file in this location ( /root/apache-tomcat-7.0.62/bin/catalina.sh)
     add JAVA_HOME at starting of the line as shown below
     JAVA_HOME="/root/jdk1.7"

3. Copy the downloaded gitblit.war file to tomcat webapps location
    $cp gitblit.war /root/apache-tomcat-7.0.62/webapps/
4. Restart tomcat server
     $cd /root/apache-tomcat-7.0.62/bin
     $./startup.sh

5. Access the gitblit from browser with an admin user
   http://192.168.146.129:8080/gitblit   (admin/admin)
 
6. Create a repository with README initial commit

7. Create the users from dashboard by clicking on admin user link -> users option
   create a user harry and password harry, then under permisisons tab provide access to the respective repo and respectvie access
   ex:
   gitrepo --> RW ( push and pull access)

Client setup on developer machine
---------------------------------
1. Download git client from below link and install it in your windows desktop
   http://git-scm.com/download/win
2. Install it as it is, how you generally install any windows msi/exe files
3. open git bash from start program and create a dir at your home location on gitbash
   C:\Users\harry>mkdir .ssh
   cd .ssh
   Enter below command and just enter 3 times
   ssk-keygen -t rsa
   This will create three files under .ssh diretory, open id_rsa.pub file and copy the public key then add the sam through gitblit web UI under your profile sections
4. Click on harry user name on gitblit dashboard, select ssh keys option then add above copied public key there.

5. Now clone the repo to your machine by running below command to create local repo/workspace

git config --global user.name "harry"
git config --global user.email "harry@gmail.com"

    git clone ssh://harry@192.168.146.129:29418/repo1.git
    cd repo1
    touch Hello.txt
    git add Hello.txt
    git commit -m"sample commit"
    git push origin master

All about SCM

You can establish a fully automated and continuous Build, Release, and Deployment infrastructure for all of your software development activities in a fraction of the time and cost it takes for you to search, interview, hire, train, and retain a full-time on-site Build & Release Engineer”

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Why AllSCM as your Build, Release, and SCM Consultant?

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 Need more info contact me : chiranjeevi.aec@gmail.com