Vamshi Krishna

vamshikrishadmn@gmail.com

785-289-5787

                                                                                                                               

 

Technical Skills:

 

Operating Systems	Linux (Red Hat 4,5,6, CENTOS & SUSE), Solaris 10/9/8, HP-UX 11.0, 11.11, 11.23, 11.31, IBM AIX  (4.3/5.x), HPUX11i V1, V2 & V3,SLES 8,9,10 & 11, Ubuntu 12/13, Windows NT /2000/2003.
Hardware	M5000, M8000, T5220, T5240 Sun E15K, E25K, Sun Fire 6800, Sun Fire 4900, Sun Fire 3800, Sun Fire 490, Sun Fire 280, v880, v890, Sun Enterprise Servers E6500, E4500, E3500, Work Group Servers E450, E420, E250, E220, Netra 1405, Netra X1, Ultra 80,  60, 30, 10, 5, 2, 1, Intel Servers, Extreme network and Cisco switches, Brocade Switches, A1000, A5200, 3510, 3511, D1000, Sun Store Edge T3, 9980, HP DL380 Gen7&8
Networking	TCP/IP, NIS, NFS, DNS, DHCP, Cisco Routers/Switches, WAN, SMTP, LAN, FTP/TFTP.
WEB Technologies	Tomcat, APACHE 2.x, 3.x, Web Logic (8/9/10) & Web Sphere 4.0/5.0
Programming Lang & Databases	MySQL, Oracle, MSSQL, C, UNIX Shell Scripting, Perl Scripting, HTML, Perl, VB, Ruby, Python.
Backup Management	Veritas NetBackup 4.x/5.x/6.x, Ufsdump, Ufsrestore, tar, cpio, dd, Tivoli, Symantec Netbackup 7.x
Third Party Software	VERITAS Volume Manager, VERITAS Cluster Service (VCS), HP Service Guard, Sun Cluster, EMC Storage, RAID Technologies, SSL, Splunk. Puppet, Chef, HPSA
Protocols	TCP/IP, UDP RIP, OSPF, EIGRP, IGRP, SNMP, SMTP, TELNET
Virtualization	VMware vCAC, vSphere, vCenter, vCloud, VMware ESX/ESXi.
Cloud	AWS EC2, S3, RDB, ELB, EBS, VPC, Auto Scaling, DynamoDB, OpenStack

 

 

Summary:

 

·               System Administrator with around 8 years of experience in Administration and Development of Red Hat Linux, SUSE Linux, Oracle EL, Centos, HP-UX and Solaris servers.

·               Experience in installing, configuring and administrating Red Hat Linux AS 3.0 /4.0/5.x/6.x & SUN Solaris 8, 9 and 10, OEL, SuSE Linux Enterprise Server (SLES) 10.x, HP-UX 11.00, 11i,AIX 6,7, Windows NT, 2000 and 2003.

·               Installed and Configured Solaris by using Jumpstart and Linux by using Kickstart.

·               Experience working Amazon AWS Cloud services like EC2, S3, ELB, EBS, VPC, RDS, etc.,.

·               Worked on Autoscaling, Cloudwatch (monitoring), AWS Elastic Beanstalk (app deployments), Amazon S3(storage) and Amazon EBS(persistent disk storage).

·               Experience with patching of Linux and Solaris servers and hardening of servers using native and third party tools.

·               Disk and File system management through Logical Volume Manager (LVM) on HP-UX, LINUX and Solaris Volume Manager (SVM) on Solaris.

·               Knowledge of networking (TCP/IP, Ethernet), NIS, DNS, NFS, DHCP, SMTP and RAID.

·               Knowledge of Routers and Switches, Subnet, VLAN, TCP/IP, VPN, OSI model, Firewall (checkpoint),

·               Created and Managed File Systems (CFS) for Oracle & Sybase data bases.

·               Experienced with the installation and configuration on Apache 2.x, 1.3.x, 1.2, Tomcat, WebSphere, JBoss4.0.x, 5.x,  Web Servers, WebLogic 8.x, 9.x, 10.x, 11.x servers and LDAP servers.

·               Configured DNS, LDAP, Apache HTTP servers.

·               Experience in scripting languages such as Shell, Perl, Python and Ruby.

·               Experience in running SQL running queries and also performing online, offline and cold backups for Orcale and MySQL.

·               Experience in SAN migrations from EMC DMX to VMAX at host level using HPUX, Linux and VERITAS LVM.

·               Expertise in Volume management, Disk Management, software RAID solutions using Veritas Volume manager. File system Tuning and growing using Veritas File System (VxFS) , planed , documented and supported high availability, fail-over, fall-back Solutions using Veritas Cluster Server in SAN environment.

·               Worked with Backup Team to Configure the Master and Client Backup servers Using VERITAS Net Back up 4.5/5.0.

·               Migrating, Configuring and installing zone and ldom.

·               Experience with private clouds such as VMware, OpenStack.

·               Worked with VMware ESX servers, and Virtual Infrastructure client to create virtual guests

·               Experience in migrating VMware ESX 3.5 to ESX 4.0&vSphere ESXi 4.1 to ESXi 5.0.

·               Extensive experience in UNIX performance monitoring and kernel tuning and Load balancing to ensure stable performance.

·               Software configuration management using Chef and Puppet.

·               Expertise in System performance tuning, capacity planning and Disaster Recovery planning.

·               Involved in installing Nagios monitoring and Splunk services on Unix servers.

 

Comcast, Philadelphia, PA

Cloud/DevOps Engineer                                                                                                                                                   Jan 2015-Till Date

 

·               Involved in building architectural diagrams using Amazon web cloud services(AWS) like creating EC2 instances, security groups, Virtual private connections, Route 53, RDS, S3, SES, SQS, SNS, Cloudformation in Amazon Linux AMI 2015, RHEL 7.x, SuSE Linux Enterprise Server 12, Ubuntu 13.x 14.x and Windows 2012 R2, 2008 R2

·               Involved completely on migrating on-prem applications into Cloud using Cloudformation templates with high security by adjusting security groups flowing inbound and outbound both on Windows and Linux instances.

·               Launched Database for MySQL 5.x and Oracle 11.x using RDS in multiple Available zones, have setup monitoring for CPU Utilization and limited DB connections by implementing alarms integrated to pagerduty via Cloudwatch.

·               Created alarms using Cloudwatch for monitoring CPU, memory, disk space etc., maintaining SES, SQS, SNS, IAM roles, S3 bucket for backups.

·               Also built CloudFront for firewall and used lambda function for maintaining CloudWatch metrics and logs.

·               ELK (Elasticsearch, Logstash and Kibana) had to be in place for logging and visualize past data through graphs and sent to S3 to store logs to avoid multiple third party tools.

·               Install and configure DHCP, web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on AIX and Redhat servers.

·               Experience working on Automation tools like Puppet and involved in developing manifests using Ruby and Shell Scripting.

·               Created and managed user accounts, security, Access Control Limits (ACL), permissions, disk space and process monitoring in Red hat Linux and AIX using Nagios

·               Worked on installing Splunk and Splunk forwarder to analyze logs of application and services.

·               Worked on Git and SVN for Source-code management to allow the Developers to do Code-Review and verifying the source code before submitting.

·               Worked on Ant-Hill Pro and Jenkins to create Workflow, Artifacts and Deploying the code to the webservers and Docker containers.

·               Implemented and Enhanced the Existing Scripts which are developed in Shell, powershell, Ruby and Python.

·               Brought repeatability, consistency, and organization to the team's development infrastructure by Puppet-izing the configuration for all of the servers used in production.

·               Worked on writing Puppet Manifest and Modules from scratch for entire application.

·               Also have hands on experience on creating cookbooks and recipes in Chef 10.x, 11.x.

·               On-call support bi-weekly for troubleshooting production issues and for any updates/patching.

·               Documenting all the production issues and application installations in confluence page.

 

 

 

 

 

 

 

Ultra Beauty, Chicago, IL

Cloud/DevOps Engineer                                         Jan 2014 – Jan 2015

 

·               Experience on AWS cloud services like EC2, S3, RDS, ELB, and EBS for installing, configuring and troubleshooting on various Amazon images for server migration from physical into cloud.

·               Involved in maintaining the user accounts (IAM), RDS, Route 53, VPC, RDB, DynamoDB, SES, SQS and SNS services in AWS cloud.

·               Spun up Windows 2008, 2012 R2, RHEL 6.x, Ubuntu 11.x, Amazon Linux instances installed Apache Tomcat application with a reverse proxy and placed these instances under an Internal and External Loadbalancers.

·               Written custom scripts for backing up data for more than 2 weeks into S3 bucket and for longer period of time the data was moved to RedShift.

·               Configured ILO IP addresses and Installed Redhat Linux 6.4, 6.5 and Solaris 10 on HP x86 servers (C7000, DL360, and DL380’s).

·               Used LVM on Linux to create volumes with layouts like RAID 1, 5, 10, 51.

·               Used puppet and Chef Automation tools for configuration management in different systems.

·               Wrote Puppet manifests in Ruby for deploying, configuring and managing collected for metric collection and monitoring

·               Implemented and Enhanced the Existing Scripts which are developed in Shell, Perl, Ruby and Python.

·               Installed and upgraded Veritas Volume Manager 6.0 and used Veritas Cluster Server to create environments for Weblogic, NFS and sendmail agents.

·               Experience in Managing SAN disks like EMC and VMAX using EMC Powerpath.

·               Installed EMC Powerpath and create Storage RAID groups, LUN’s and assigning them to the servers.

·               Experience in Troubleshooting and performance tuning issues with applications like Oracle 10.x, 11.x JBoss 5.x, WebLogic 11.x, 12.x.

·               Expericence in installing and deploying Apache, JBoss 5.x

·               Support of Applications like Apache Tomcat and Java based applications running on Linux machines for multiple clients.

·               Experience with F5 load balancers to load balance and reverse proxy servers.

·               Experience in Weblogic and WSIL deployments.

·               Installed and configured VMware products including vCAC, vSphere, vCenter, vCloud.

·               VMware ESX/ESXi 5.x installation, configuration and maintenance.

·               Built ESXi servers and implemented complete integration with SAN for VMotion in VMware DRS and HA enabled.

·               Implemented automated Cloud infrastructure using Chef.

·               Utilize Cloud formation and Puppet by creating DevOps processes for consistent and reliable deployment methodology.

·               Experience in Virtualization Softwares (Hypervisor, KVM, OpenStack etc.)

·               Familiar with OpenStack concepts of user facing availability zones and administrator facing host aggregates.

·               On-call support for 24/7 for troubleshooting production issues.

·               Created a discussion group for cloud support team in shared point and also maintained all documentations here.

 

Atos, Chicago IL

Sr. Linux/DevOps Engineer                                        Jan 2013 – Dec 2013

 

·               Installing and upgrading Redhat Linux on HP x86 and Itanium Servers and Solaris on Sun SPARC, HP DL 380 G 4, 5, 6 and 7 & Dell Power Edge servers.

·               Installing and maintaining Solaris Jumpstart environment and Redhat Kickstart environment.

·               Involved in application deployments in java using Anthill pro 4.x and 5.x component from development to production environment.

·               Used OpenStack and AWS cloud services to launch Linux and windows machines, created security groups and written basic powershell scripts to take backups and mount network shared drives.

·               Creating sparse root and whole root zones and administered the zones for Web, Application and Database servers and worked on SMF on Solaris 10.

·               Used HP Service center and Remedy change management system for ticketing.

·               Troubleshooting and performance tuning issues with applications like Oracle 10g, JBoss 4.x, WebLogic 10, MQSeries 6.x and the operating systems which included Solaris and RHEL.

·               Worked on the administration of the Apache, JBoss 4.2.2 servers including installation and deployments.

·               Experience in building customized RPM packages.

·               Shell scripting to automate the regular tasks like removing core files, taking backups of important files, file transfers among servers.

·               Experience in writing scripts in Ruby and Python for automation.

·               Used Sun Volume Manager for Solaris and LVM on Linux to create volumes with layouts like RAID 1, 5, 10, 51.

·               Experience in NAS environment carrying Netapp filers and EMC Celerras.

·               Experience managing SAN disks like EMC Clarions and VMAX using EMC Power path and Volume management software.

·               Experience working with GIT and LDAP.

·               Worked with VERITAS Foundation Suite 5 and performed tasks like creating disk groups, volumes, initializing disks, replacing failed disks etc.

·               Implemented HA using VERITAS Cluster Server 5.0 for Apache gent and Ldom.

·               Installed, configured and administrated a multiple number of virtualization environments which includes LDOM, Zone and Hardware Domain etc.

·               Implemented and administered VMware ESX for running the Windows , Redhat Linux Servers on development and test servers.

·               Installed and upgraded VMware vSphere ESXi 5.0/4.1/4.0 and ESX server 4.1/4/3.5.

·               Configured VMware HA, VMware DRS in acquiring higher efficiency for VMware Infrastructure.

·               Installation, configuration and troubleshooting of Redhat, Ubuntu on various hardware platforms on Amazon AWS cloud services.

·               Worked on AWS service to create, launch, configure EC2 instance, worked on S3, RDS, Auto Scaling, SES, SQS,VPC, to build given architectures.

·               Used puppet and Chef automation tools for configuration management.

·               Implemented Puppet modules to automate configuration of a broad range of services

·               Responsible for supporting and maintaining OpenStack in a production environment.

·               Implemented the monitoring tools like Nagios 3.0 to monitor services like CPU, Hard Drive, Memory, Users, http, ssh etc.

·               Experience Installing and configuring Splunk to gather stats on the servers.

·               Documenting all the processes for above, issues caused and its solutions in timely manner.

 

Shell - Houston, TX

Sr. Unix/Linux Administrator                                      Oct 2011 – Dec 2012

 

·               Installation of Solaris 8, 9 based servers with Jumpstart and RedHat Linux EL 4.x based servers using Kickstart in development, test and production environments.

·               Performed project coordination function for evaluation, installation, monitoring, and maintenance of server software on variety of hardware platforms.

·               Installed/ upgraded patches, firmware (OBP), and security (Kernel) patches for all applications in installed infrastructure.

·               Responsible for user administration and management using SUDO and RBAC

·               Built new systems for Production and migrated from Solaris 8 to 9.

·               Maintained Volumes and File systems using VxVM / VxFS for Oracle, DB2, MySQL databases.

·               Used VxVM to add disk, create new disk groups/volumes, resize, deport and import disk groups between servers.

·               Experience with running SQL queries on Oracle and MySQL.

·               Upgraded over 35 servers with VERITAS Volume Manager from 3.x to 4.0.

·               Used VERITAS Cluster Server 4.1 to create high available environments for NFS, WebLogic and Sendmail agents.

·               Experience with SAN Arrays like creates Storage RAID groups and LUN’s and assigning them to the servers.

·               Performed systems monitoring, upgrades, performance tuning and backup and recovery. 

·               Implementation of naming services like DNS with Bind 8.4.x and NIS.

·               Upgraded VMware ESX 3.5 infrastructure to VMware vSphere 4.1 and VMware vCenter 4.1.

·               Administered VMware environment, evaluated and implemented new hardware and software

·               Took active part in troubleshooting VMwarevCenter and ESX issues and also in system  hardware failures.

·               Provided 24x7 on-call / Remote Support for UNIX Production Problems on weekly rotation basis.

·               Troubleshooting day-to-day server related issues and problems.

 

 

 

 

Motorola – India/Chicago IL

Linux/Solaris Systems Administrator                                 Jan 2009 – Sep 2011

 

·               UNIX Administration- maintaining around 1000 Production environment including Solaris & RHEL 3.x & 4.x servers. Managing their memory / CPU load, Disk Space, swap space, processes etc running on them Creating System Disk Partition, mirroring root disk drive, configuring device groups in UNIX and Linux environment.

·               Installation, configuration & administration of Redhat Linux 8/ 9/ RHEL 3.0/ RHEL 4.0 & Solaris 8/9, IBM AIX servers.

·               Upgrading Development servers to Solaris 9 and 10

·               Experience configuring ILO and Manage Servers remotely using ILO

·               Configure servers to use HTTP, DNS, NFS, NetBackup, and Storage Disk configuration.

·               Creating & administer user accounts, SUDO access, etc

·               Managing file systems; grow them on fly using LVM on Solaris and Linux.

·               Implementing software RAID at install-time on Linux..

·               Add, remove, and resize logical volumes on Linux and Solaris

·               Diagnose and correct boot failures arising from boot loader, module, and file system errors on Linux

·               Worked on NetBackup migration

·               Mirror the root volume group in Solaris and use it for redundancy.

·               Configure VERTITAS for a clustering environment on Redhat and Solaris servers.

·               Performing O/S upgrades and Maintenance level upgrades.

·               Use ILO/HMC for remote access of servers on Linux/Solaris respectively.

·               Shell Scripting to automate tasks on Solaris and Linux.

·               Co-ordinate with IBM and HP for faulty part replacement.

 

 

HSBC Bank – India

Jr. Unix Administrator                                           Mar 2008 – Dec 2008

 

·               Installing, configuring and updating Solaris 7, 8, Red Hat 7.x, 8, 9, Windows NT/2000 Systems using media and Jumpstart and Kickstart.

·               Creating and Authenticating Windows user accounts on Citrix server.

·               Creating System Disk Partition, mirroring root disk drive, configuring device groups in UNIX and Linux environment.

·               Working with VERITAS Volume Manager 3.5 and Logical Volume Manager for file system management, data backup and recovery.

·               Experience working with SVN and GIT and LDAP.

·               User administration which included creating backup account for new users and deleting account for the retired or deleted users.

·               Implementing backup solution using Dell T120 autoloader and CA Arc Serve 7.0

·               Managing Tape Drives and recycling it after specific period of time as per the firms policies.

·               Working with DBA’s for writing Scripts to take database backup and scheduling backup using cron jobs.

·               Creating UNIX and PERL scripts for automated data backup, status of the storage.

·               Installing and configuring Oracle 8i database server on Solaris after creating the file systems, users and tuning the kernel.

·               Installed and Configured SSH Gate for Remote and Secured Connection.

·               Setting up labs from scratch, testing hardware, installing and configuring various hardware devices like printers, scanners, modems, network and communication devices.

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

·               Installing, Configuring and Troubleshooting various software’s like Windd, Citrix – Clarify, Rave, VPN, SSH Gate, Visio 2000, Star Application, Lotus Notes, Mail clients, Business Objects, Oracle, Microsoft Project.

·               Troubleshooting and solving problems related to users, applications, hardware etc.

·               Working 24/7 on call for application and system support.