Ragendu Mohanakumar

Kubernetes/ Cloud Support for a leading US Telecom client

• Provide support for 50+ Vanilla Kubernetes clusters on AWS and Azure
• Experience in provisioning, upgrade of kubernetes clusters and core components.
• Provide migration planning and support for kubernetes.
• Maintain/support portworx persistent storage infrastructure
• Provide AWS support for cloud infrastructure.
• ELB - creation and administration of ELBs
• AutoScaling - Automatically launch or terminate EC2 instances based on user-defined policies, health status checks, and schedules using Amazon EC2 Auto Scaling
• Creation of launch configuration and configuration of scaling options.
• Certificate Management - Certificate management using Venafi and Custom Tools.
• Platform support for Linux Servers
• Worked on automating deployment of customized puppet-ha
• Provided SME support fir Linux infrastructure for fortune 500 company
• Platform support for Linux Servers
• Support Migration activities from puppet opensource to enterprise
• Investigating performance issues pertaining to servers
• Problem Management
• Automation of manual jobs.
• Proved successful working within tight deadlines and fast-paced atmosphere.

• Provided platform support (RHEL) for Servers
• Performed root cause/performance analysis of Linux servers
• Performed administration and troubleshooting of Inter Carrier MMS Servers
• Problem Management.

• Administration of 1500+ Linux servers for performance optimization and Tuning
• Including 800+ Zimbra servers (22million+ email boxes)
• Plan and execute Changes by ensuring 100% success in change management
• Trend and Root cause analysis
• Management of server/service outages with minimal down time
• Automation tasks, for delivery improvements
• Active participation as SPOC for various activities such as new server build/upgrade
• Analysis of system logs to identify potential problems
• HP Blade system Management Using HP Integrated Lights-Out (ILO) and OA
• Administration of HP ProLiant BL465c
• Incident, Change, and problem Management by following complete ITIL process
• Bizanga MTA and Zimbra Mail Server Management
• Knowledge transfer to new members and Team

• Oversee Maintenance and support of over 90 servers including installation and support for Qmail mail servers on collocated and shared servers with combined user-base of 50000+, dedicated Spamd servers, Apache web servers
• Handle installation, configuration and maintenance of Cisco PIX firewalls, Redhat, Cpanel, Plesk web hosting servers, IPtables firewalls on Linux servers and DNS Administration
• Provided Network Security Consultancy for Rane Madras Ltd
• And responsible for security and availability of Rane servers and network for network security and design
• Redesign of hosted email system making it more resilient, responsive, secure and spam resistant
• Porting of Rcash Application server from Solaris platform to Linux for Yardi Software Pune
• Designed and implemented intrusion detection and firewall protection for Rane WAN using snort and Cisco Pix firewalls
• Designed and implemented security policies for Rane servers as part of ongoing BS7799 certification process
• Designed and rolled out High Availability Email and FTP servers for Subhiksha Trading Services, Chennai.