Manager - Cloud Operations

About The Company

Tata Communications Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications

KUBERNETES MANAGER

Role: Kubernetes Manager – B3-2

Level: L3 / Senior Kubernetes Administration & Operations

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

Mandatory Skills

• CKA certification – Mandatory
• 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
• Configure and manage Alert manager
• 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
  
  

Platform Components

Working Knowledge Of

Component

Required Knowledge

Istio

Service Mesh, Gateway, traffic management

NGINX

Ingress / reverse proxy

Kong

API Gateway

Redis

Cache / datastore

PostgreSQL

Database fundamentals & troubleshooting

Kafka

Messaging / event streaming

RabbitMQ

Message broker

Keycloak

IAM / authentication

Gatekeeper

Kubernetes policy enforcement

Harbor

Container registry

Prometheus

Monitoring

Grafana

Visualization

Alertmanager

Alert management

ELK

Centralized logging

Fluentd

Log collection

Customer & Operations Responsibilities

• Provide 24×7/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