Devops Engineer/System Admin

·               Over 7+ years of experience in System administration where 3+ years of experience as a DevOps Engineer with configuration management tools such as chef, puppet, Ansible, Docker, continuous integration using Jenkins, ANT, Maven build tools and version control using GIT, SVN deployed on cloud infrastructure using AWS and on-premise virtualization using VMWare and extensive programming in Python, Ruby, Perl and Shell scripting.

·               Experience in planning, installation, configuration and migration of systems; along with maintenance and deployment of Linux RHEL 5.x/6.x, Windows  2008 and 2012.

·               Build and troubleshooting experience of Red Hat Linux, Windows Server 2008 & 2012 hosted on VMware ESXi Servers and AWS.

·               Experience in installation, configuration and administration of VMware ESXI, vCenter, RDS, HA Clustering, SUN Virtual Box, and Microsoft Virtual PC.

·               Extensively worked on Jenkins/Hudson by installing, configuring and maintaining for the purpose of Continuous integration (CI) and for End to End automation for all build and deployments.

·               Hands on Experience in AWS Cloud administration such as AMI, EC2, ELB, S3, Route 53 Domain configuration. 

·               Experience in creating the company's DevOps strategy in a mix environment of Linux (RHEL, Ubuntu) servers along with implementing a cloud strategy based on AWS.

·               Expertise in managing EC2 instances, EBS and RDS on the Amazon Web Services (AWS) platform using chef configuration management tools.

·               Experience with Chef Enterprise as well as On-Premise, Installed Workstation, Bootstrapped Nodes, Wrote Recipes and Cookbooks and uploaded them to Chef-server, Managed On-site OS/Applications/Services/Packages using Chef as well as AWS for EC2/S3/Route53 & ELB with Chef Cookbooks.

·               Written Chef Cookbooks and recipes to Provision several pre-prod environments consisting of Cassandra DB installations, WebSphere installation and creation of profiles.

·               Developed OpenStack infrastructure with automation and configuration management tools such as Ansible, Puppet, or custom-built cloud hosted applications and used Ansible for continuous integrations.

·               Experience in deploying and maintaining private cloud infrastructure of OpenStack. Proficient in tracing complex build problems, release issues and environment issues in a multi-component environment like OpenStack .

·               Experienced in creating puppet manifests and modules to automate system operations.

·               Great Efficiency in installing, configuring and implementing the RAID Technologies using various tools like VxVMand SVM. 

·               Experience with container based deployments using Docker, working with Docker images, Dockerhub and Docker registries. 

·               Virtualized the servers on AWS using the Docker, created the Docker files and version control.

·               Experienced in Implementation and maintenance of branching and bulid/release strategies by using GIT and Subversion (SVN) involved in periodic archiving and storage of the source code for disaster recovery.

·               Experienced in Administration and Managing the source code control of multiple development efforts using Clear Case, Subversion, TFS, Git and SVN version control tools. 

·               Configuration and administration of Fiber card Adapter's and handling Linux part of SAN (SAN arrays HITACHI).

·               Performed regular software release build and deployment based on defined process and procedure, including J2EE, UNIX Scripts, Oracle PL/SQL build and deployment. Managed, maintained and deployed to test, acceptance and PROD environments. 

·               Good experience to setup, configure continuous build processes using Buildforge/CruiseControl/Hudson, Jenkins, Maven, Ant, Nant, MSbuild, Subversion and ClearCase, Perl. 

·               Extensive experience using MAVEN and ANT as build tools for the building of deployable artifacts (jar, war & ear) from source code.

·               Expertise in detecting network outages and protocol failures by using Nagios monitoring system and also experienced in configuring other monitoring tools like Splunk, Sitescope, and Cloud watch.

·               Ability to resolve issues quickly, able to identify tasks which should be automated and then write scripts to automate them.

·               Having good experience in Red Hat, EMC storage devices, Disaster Recovery like data Recovery, Hitachi storage devices and veritas Netback up version 6.

·               Participated in entire Software Development Life Cycle (SDLC) including Requirement Analysis, Design, Development, Testing, Implementation, Documentation and Support of software applications. 

·               Experience in Agile Methodology, deploying applications, Load Balancing and Fail over functionality in clustered environment. 

·               Experienced in writing Python Scripts to support Web Logic Scripting Tool (WLST). 

·               Have extensive experience in building and deploying applications on Web/Application Servers like JBoss, WebLogic, IBM WebSphere, GlassFish and Tomcat.

·               Manage deployments at internal and internal and externally accessible QA, SIT demo, and Production systems.

·               Extensive experience in managing and configuring secured environments using SSL, Mutual Authentication and Digital Certificates.

·               Strong Knowledge in networking (Switching, routing, Firewall, DNS, TCP/IP, HTTP, SSL). 

·               In-depth understanding of the principles and best practices of Software Configuration Management (SCM) processes, which include compiling, packaging, deploying and Application configurations. 

·               Hands-on Experience of the J2EE Framework and its components as related to Java build, test, deployment and release management initiatives.

·               Deep understanding of Layer 7 protocols like HTTP, DHCP, DNS, SSL/T.

·               Experienced in Querying RDBMS such as Oracle, MY SQL and SQL Server by using SQL for data integrity. 

·               Experienced in First tier escalation for critical system issues and user support via 24x7 NOC & on-call rotation.

  Bachelor’s of Technology, Kakatiya University, India.

Responsibilities:

·               Configured and maintained Linux virtualization in test and production environment using VMware vSphere Client and HPSA for Redhat Linux OS installation.

·               Installed Workstation, Bootstrapped Nodes, Wrote Recipes and Cookbooks and uploaded them to Chef-server, Managed On-site OS/Applications/Services/Packages using Chef.

·               Installing, configuring and administering Jenkins Continuous Integration tool on Linux machines along with adding/updating plugins such as GIT, ANT, and Chef. 

·               Created Chef driven configuration of user accounts and Installed packages on Chef only when necessary by managing the attributes and also involved in setting up builds using Chef as a configuration management tool.

·               Used Chef and other configuration management tools to deploy consistent infrastructure code across multiple environments.             

·               Manage AWS EC2 instances utilizing Auto Scaling, Elastic Load Balancing and Glacier for our environments. 

·               Provisioned and maintained Amazon AWS server provisioning via chef. This included the provisioning of the instances, ELBs, DNS. Also contributed code to the Jenkins-aws module on github as part of this.

·               Implemented AWS solutions using EC2, S3, RDS, EBS, Elastic Load Balancer, Auto scaling groups, Optimized volumes and EC2 instances.

·                Implemented and maintained the monitoring and alerting of production and corporate servers/storage using AWS Cloudwatch. 

·               Worked on the migration from VMware to AWS, and used Chef to automate the infrastructure in AWS by creating EC2, S3, RDS, VPC and Route 53.

·               Deploy and monitor scalable infrastructure on AWS & configuration management using Ansible. 

·               Worked on Agile projects for a DevOps team to help deliver critical functionality to a cloud based service. 

·               Developed and implemented Software Release Management strategies for various applications according to the agile process. 

·               Developed build scripts using ANT and MAVEN as the build tools for the creation of build artifacts like war or ear files.

·               Installed and configured Jenkins, Installed plug-in, configured security, created a master and slaves for implementation of multiple parallel builds.

·               Creating repositories, branches, tags in GIT and assist the developers to fix merging issues and Creating Local, Virtual Repositories in Artifactory for the project and release builds, repository management in Maven to share snapshots and releases of internal projects using JFrog Artifactory tool. 

·               Deployed Enterprise Application Archive (EAR), Web Application Archive (WAR), JSP's, and Servlets in Staging and Production. 

·               Developed python scripts to automate applications migration and monitor application health during migration.

·               Virtualized the servers using the Docker for the test environments and dev-environment needs. Used Docker containers for eliminating a source of friction between development and operations.

·               Rebase/Merged Projects Streams with Release Streams after the frozen/production release and resolved the conflicts during the rebasing. 

·               Installed, Configured, Managed Monitoring Tools such as Splunk, Nagios for Resource Monitoring/Network Monitoring/Log Trace Monitoring.

·               Coordinate Releases from Dev to Production. Communicating with Developers, Testers, Managers, UNIX, Network teams and DBA teams for successful Release. 

·               Attended daily stand up meetings, bug-scrub meetings, Sprint planning meetings and Weekly release health check-up meetings as best practices of agile environment. 

Environment: GIT, SVN, Ant, Maven, Gradle, WebSphere, Artifactory, Jenkins, UrbanCode Deploy, AWS, RAD, Shell, Quality Center, Unix, Linux, Windows, Java/J2EE

Responsibilities:

·               Installed and configured an automated tool Puppet that included the installation and configuration of the Puppet master, agent nodes and an admin control workstation.

·               Deployed Puppet, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure. 

·               Created custom modules and manifests in Puppet using Facts, Resource Types and Provider to configure, install and run various applications and customized puppet scripts to perform further provisioning for entire stack. 

·               Managed Amazon Web Services like EC2, S3 bucket, RDS, EBS, ELB, Auto-Scaling, AMI, IAM through AWS Console and API Integration with Puppet Code.

·               Deploy and monitor scalable infrastructure on Amazon web services (AWS) & configuration management using puppet.

·               Designed AWS Cloud Formation templates to create custom sized VPC, subnets, NAT to ensure successful deployment of Web Applications and database template.

·               Implemented roles and groups for users and resources using AWS Identity Access Management (IAM) and also managed network security using Security Groups and IAM.

·               Creating S3 buckets and also managing policies for S3 buckets and Utilized S3 bucket and Glacier for storage and backup on AWS. 

·               Resolved emerging issues during build and release by conducting meetings with developers and managers. 

·               Implemented Jenkins Workflow and Plugins for repeatable deployments of multi-tier applications, artifacts and services to Docker, and Red Hat. 

·               Python scripts to automate AWS services which include web servers, ELB, Cloud front distribution, database, EC2 and database security groups, S3 bucket and application configuration, this script creates stacks, single servers, or joins web servers to stacks. 

·               Built and deployed Java/J2EE to a web application server in an Agile continuous integration environment and also automated the whole process. 

·               Deployed LDAP for centralized authentication and developed Shell/Batch/Python Scripts for automation purpose. 

·               Developed Python and Shell Scripts for automation of the build and release process. 

·               Involved in writing and editing the existing ANT (Build.XML) files in case of errors or changes in the project requirements. 

·               Created branching & tagging strategy to maintain the source code in the GIT repository and Coordinated with developers with establishing and applying appropriate branching, labeling/naming conventions using GIT source control.

·               Managed SVN repositories for branching, merging, and tagging and Managed Users and Groups in SVN and involved in troubleshooting client spec issues and user issues.

·               Implemented Maven builds for creating JAR'S, WAR'S and EAR'S. Managed the artifacts generated by Maven in the Nexus repository. 

·               Designed and deployed best SCM processes and procedures and supported off-shore team by advicing on best practices.

·               Created Deployment notes along with the Local SCM team and released the Deployment Instruction to application support. 

·               Used tracking tool JIRA to detect, organize and giving priorities to the issues and used it for assigining permissions to users and groups for the projects.

·               Supported and developed tools for integration, automated testing and release management. Verified if the methods used to create and recreate software builds are consistent and repeatable. 

·               Followed up with the Test Team and Development Team and Posted the build on time and followed it up the testing team on posted builds.

Environment: UNIX native tools (tar/dd). sar, prof, vmstat, iostat, netstat, LVM, Vsphere 4.x. & 5.x. Solaris, CentOS 5.x/6.x and Redhat Linux. RPM and YUM. EMC Powerpath, VMAX migration.

Responsibilities: 

·               Installation, Configuration, Administration and Upgrade of RedhatLinux 5.x, 6.x Operating systems.

·               Implemented and administered VMware ESX 3.5, 4.x for running the Redhat Linux servers on development ant test servers. 

·               Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands. 

·               Experience in Setting up and configuring Install Server, Configuration Server and Boot Server for Kickstart process & performed Kickstart to install OS on Several workstations.

·               Configuring distributed file systems and administering NFS server and NFS clients and editing auto-mounting mapping as per system / user requirements.

·               Creating, troubleshooting and mounting NFS File systems on different OS platforms. 

·               Configured various services, devices as well as applications of UNIX servers and worked with application team to customize the environment.

·               Creating the filesystems using redhat volume manager and performing the healthcheck on regular basis for all Linux serves

·               Scanning the newly assigned LUNs to the serves and assigning them to volumegroup and increasing the filesystem using redhat volume manager

·               Mounting &  unmounting the netapp storage LUNs to the Redhat Linux servers and troubleshooting the issues encountered.

·               Installation/Configuration of ESXi 3.5, 4.x servers and applying security patches to the ESXi servers.

·               Managing the ESXi servers using the Vsphere client and Vcenter for managing the multiple ESXi server.

·               Building the Red hat Linux server in Vmware ESX client through Vsphere client.

·               Storage mapping on Red hat linux and create the Volume group , Filesystems using Logical Volume manager.

·               Key participant in implementation and integration of three new data centers including physical, logical and application level testing and support and developed and executed test plans for Veritas Cluster with Netapp SAN.

·               Developed Cron jobs and Shell Scripts (Shell, Python) for automating administration tasks like file system management, process management, backup and restore. 

·               Involved in development, user acceptance, and performance testing, production & disaster recovery server.

·               Responsible for configuring Postfix mail relays with Mail Exchangers, Bind DNS Server and clients, SNMP v3 and NTP relays.

·               Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.

·               Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.

·               Optimize company servers ensuring business success by performing design, installation and administration in addition to NFS/CIFS file system mounting and support for developers. 

·               Firmware upgrade, managing the servers, collecting Logs, open KVM console for troubleshooting. Configuration and maintenance of Apache and Tomcat Servers.

·               Kernel tuning, Writing Shell scripts for system maintenance and file management, also worked on Solaris volume manager to create file systems as per user and database requirements.

·               Exposed to cluster environment in increasing hardware in clusters to perform critical applications in respect to search-engines deployment for better request performance, involving roll-over and roll-back strategies. 

·               Taking individual responsibility for resolving issues reported to the NOC from multiple sources including trouble tickets, phone calls and automated alerts. Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.

·               Managing daily operation of a true heterogeneous environment consisting of Linux/Unix and (around 1500+ servers). Also involved in data center activity as and when required. 

·               Resolving critical system issues on a 24x7 basis, including notification, coordination and dispatch of individuals from various functional groups within the organization.

·               Working closely with managers and operations engineers to ensure the success of daily operations. 

Environment: Red Hat 5.x, 6.x , VMware ESX 3.5, 4.x , python, SNMP v3, NTP, Oracle 10g servers, NFS/CIFS, KVM.

Responsibilities: 

·               Administered, maintained Red Hat 3.0, 4.0, 5.0, 6.0 AS, ES, Troubleshooting Hardware, Operating System Application & Network problems and performance issues; Deployed latest patches for, Linux and Application servers, Performed Red Hat Linux Kernel Tuning.

·               Experience in implementing and configuring network services such as HTTP, DHCP, and TFTP.

·               Install and configure DHCP, DNS (BIND, MS), web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on Linux servers.

·               Administered Linux servers for several functions including managing Apache/Tomcat server, mail server, MySQL databases in both development and production.

·               Manage Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on Linux(RHEL) systems. 

·               Monitoring System Performance of Virtual memory, Managing Swap Space, Disk utilization and CPU utilization. 

·               Managed system processes and scheduled processes with the cron utility.

·               Performing tape backups, archiving and checking data integrity through Shell Scripts and job automation.

·               Configure client networks to integrate Windows systems with Linux systems including SAMBA sharing, Print servers, and Router configurations.

·               Initiating the crisis management calls and provide troubleshooting during the outage situation

·               Installing, Configuring and Maintaining the DHCP, DNS, NFS, NIS, send mail server and LDAP.

·               User Account Management, Group Account Management, configuring dumb terminals, adding modems, formatting and partitioning disks, manipulating swap, local and remote printer management, restoring backup, scheduling jobs.

·               Performance tuning and preventive maintenance, performed daily backup. Diagnosed hardware and software problems and provided solution to them.

·               Resolving TCP/IP network access problems for the clients. Implementing Remote System Monitoring with Sun Microsystems. Develop, Maintain, update various scripts for services (start, stop, restart, recycle, cron jobs) unix based shell.

·               Created Bash shell, Power shell and perl scripts to monitor system resources and system maintenance and performed administrative tasks such as System startup/shutdown and Backup strategy.

·               Installing and setting up Oracle9i on Linux for the development team and worked with Linux kernel, memory upgrades and swaps area. Modified the Linux kernel to add tracing probes for Configuration access tool.

·               Created users, manage user permissions, maintain User & File System quota on Redhat Linux.

·               Responsible for reviewing all open tickets, resolve and close any existing tickets. Monitored trouble ticket queue to attend user and system calls.

·               Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.

·               Updated data in inventory management package for Software and Hardware products.

·               Capacity Planning, Infrastructure design and ordering systems. Worked with DBAs on installation of RDBMS database, restoration and log generation.

·               Provided 24*7 production support and performed weekend changes during maintenance window. 

Environment: Red Hat Linux 3.0,4.0,5.0 AS ES, HP-DL585, Oracle 9i/10g, Samba, VMware Tomcat 3.x,4.x,5.x, Apache Server 1.x,2.x, Bash.