Kubernetes Administrator _ Chennai (1 Year Fixed Contract)

Tata Communications Limited; Chennai District; On-site; INR 1,400,000 - 1,800,000; Full time

Job summary

Tata Communications Limited in Chennai is seeking a Manager-level FTC with deep Linux and Kubernetes expertise to run production operations, troubleshoot incidents, and manage deployments.

The role covers Kubernetes architecture, upgrades, security, networking, storage and day-to-day cluster administration with customer escalations handled within SLA.

Qualifications

• Strong/deep knowledge of Linux administration and troubleshooting
• Strong hands-on experience in Kubernetes administration and L3 troubleshooting
• Knowledge on virtualization like vSphere, OpenStack, Ovirt , KVM
• Production experience in Kubernetes cluster operations, incident management and troubleshooting
• Strong knowledge of Kubernetes architecture, control plane, worker nodes, networking, storage and workloads
• Ability to handle P1/P2/P3 incidents and customer escalations within SLA
• Hands-on experience with Kubernetes upgrades, patching and maintenance
• Strong understanding of container runtime technologies: containerd, CRI-O, Docker, CRI
• Experience with container registries, preferably Harbor

Responsibilities

• Day-to-day Kubernetes cluster administration
• L3 troubleshooting of Kubernetes issues
• Kubernetes upgrade and patching activities
• Cluster health checks
• Node and pod troubleshooting
• Control-plane and worker-node troubleshooting
• Kubernetes networking troubleshooting
• Kubernetes storage troubleshooting
• Resource and performance analysis
• Incident/problem management
• Root Cause Analysis (RCA)
• Vulnerability remediation
• Production change implementation
• Customer-specific Kubernetes requirements

Skills

Linux administration

Kubernetes administration

Virtualization

Kubernetes upgrades

Container runtimes

Container registries

Monitoring

CI/CD

Kubernetes operations

Security & vulnerability

Networking

Storage

Incident management

Tools

Harbor

vSphere

OpenStack

Ovirt

KVM

Prometheus

Grafana

ELK/EFK

Fluentd

Jenkins

GitLab CI/CD

Git

Job description

Band: Manager

Role: FTC (1 Year fixed contract)

Location: Chennai

Primary Focus: Linux Administration, Kubernetes Administration, Production Operations, SRE, Monitoring, Security, Upgrades and Customer Escalation

Mandatory Skills

• Strong/deep knowledge of Linux administration and troubleshooting
• Strong hands-on experience in Kubernetes administration and L3 troubleshooting
• Knowledge on virtualization like vSphere, OpenStack, Ovirt , KVM
• Production experience in Kubernetes cluster operations, incident management and troubleshooting
• Strong knowledge of Kubernetes architecture, control plane, worker nodes, networking, storage and workloads
• Ability to handle P1/P2/P3 incidents and customer escalations within SLA
• Hands-on experience with Kubernetes upgrades, patching and maintenance
• Strong understanding of container runtime technologies:
  • containerd
  • CRI-O
  • Docker
  • CRI
• Experience with container registries, preferably Harbor

Monitoring & Observability

• Configure and administer Prometheus
• Manager Configure and manage Alert
• Grafana dashboard creation and monitoring
• Kubernetes cluster health monitoring
• Alert investigation and resolution within SLA
• Alert tuning and noise reduction
• Identify duplicate/repeated alerts and optimize alert rules
• Experience with ELK/EFK and Fluentd
• Log collection, analysis and troubleshooting

CI/CD & DevOps

Hands-on experience with:

• Jenkins
• GitLab CI/CD
• Git
• Container image build and deployment
• Kubernetes deployment automation
• CI/CD troubleshooting

Kubernetes Operations

Responsible for:

• Day-to-day Kubernetes cluster administration
• L3 troubleshooting of Kubernetes issues
• Kubernetes upgrade and patching activities
• Cluster health checks
• Node and pod troubleshooting
• Control-plane and worker-node troubleshooting
• Kubernetes networking troubleshooting
• Kubernetes storage troubleshooting
• Resource and performance analysis
• Incident/problem management
• Root Cause Analysis (RCA)
• Vulnerability remediation
• Production change implementation
• Customer-specific Kubernetes requirements

Security & Vulnerability Management

• Kubernetes security best practices
• Vulnerability identification and remediation
• Container image vulnerability management
• Registry security
• Kubernetes RBAC
• Network/security policy concepts
• SSL/TLS certificate management
• Experience with security tools such as Gatekeeper
• Ability to coordinate vulnerability fixes across OS, Kubernetes and container layers

Networking

Strong understanding of:

• DNS
• TCP/IP and L3 networking
• Load Balancers
• SSL/TLS termination
• Ingress
• Kubernetes Services
• Network troubleshooting
• Ingress Controllers
• Istio Gateway
• Service Mesh concepts
• NGINX
• Kong API Gateway

Storage

Good understanding of Kubernetes storage and underlying infrastructure:

• NFS / File storage
• Block storage
• Object storage
• PV/PVC
• StorageClass
• CSI
• Storage troubleshooting
• Mount and I/O issues
• Storage performance concepts

Customer & Operations Responsibilities

• Provide 247/on-call customer support as required
• Handle customer escalations at OS and Kubernetes levels
• Understand and resolve customer production issues
• Participate in incident bridges and technical discussions
• Perform RCA for critical incidents
• Track and resolve tickets within defined SLA
• Handle day-to-day customer requirements
• Coordinate with development, compute, network, storage, security and application teams
• Ensure production changes follow the approved change-management process
• Prepare technical documentation and operational procedures