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Testimonials
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Working with MeteorOps was exactly the solution we looked for. We met a professional, involved, problem solving DevOps team, that gave us an impact in a short term period.
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How it works?
Cilium is a Kubernetes CNI that provides networking, security, and observability using an eBPF-based datapath. It is commonly adopted by platform and DevOps teams to standardize service-to-service connectivity, enforce identity-aware network policies, and improve runtime visibility in microservice-heavy or multi-tenant clusters.
It typically runs as part of the cluster networking stack in self-managed or managed Kubernetes environments and is integrated into platform workflows for policy management, traffic monitoring, and troubleshooting. For related platform architecture and operations guidance, see Kubernetes consulting.
- High-performance networking and service load balancing via eBPF
- Enforcement of Kubernetes NetworkPolicy and extended policy controls
- Flow visibility and logging to support debugging and incident response
- Support for multi-cluster connectivity and advanced traffic patterns
Networking, in the context of computer science and information technology, refers to the practice of connecting computers, servers, mainframes, network devices, peripherals, or other devices to exchange data and share resources. It encompasses both the physical (hardware) and logical (software) aspects of connections between devices. The primary goal of networking is to enable the sharing of data and resources, thereby improving efficiency and accessibility within and across computing environments. Networks can vary in size, ranging from simple local area networks (LANs) connecting a few devices in a single office, to complex wide area networks (WANs) spanning multiple geographic locations around the globe. Networking technologies and protocols facilitate communication and data transfer across these connections, adhering to standardized rules to ensure reliable and secure information exchange.
- Connect distributed users, applications, and services across on-premises, cloud, and hybrid environments.
- Improve performance and responsiveness through traffic optimization, routing, and load balancing.
- Increase reliability and uptime with redundancy, failover, and resilient network design.
- Strengthen security by segmenting networks, controlling access, and monitoring for threats and anomalies.
- Enable scalable growth by adding sites, devices, and bandwidth with predictable management processes.
- Support remote work and mobility with secure connectivity for branch offices and roaming endpoints.
- Enhance observability with centralized visibility into latency, packet loss, utilization, and service health.
- Simplify operations through automated provisioning, configuration management, and policy enforcement.
- Meet compliance and governance requirements with auditing, logging, and standardized network controls.
Cilium is a Kubernetes CNI that uses an eBPF-based datapath to deliver high-performance networking, identity-aware security controls, and deep runtime observability. It is used to standardize service connectivity and enforce policy reliably in fast-changing clusters.
- eBPF datapath improves packet processing efficiency compared to iptables-heavy approaches, helping reduce CPU overhead and tail latency under load.
- Identity-based policy uses Kubernetes labels and service identities, keeping rules stable as pods scale and IPs change.
- Layer 3 to Layer 7 policy support enables application-aware controls for supported protocols, such as restricting HTTP methods and paths in addition to allow and deny.
- Supports Kubernetes NetworkPolicy while adding CiliumNetworkPolicy extensions for richer semantics, including clusterwide policies and advanced selectors.
- Built-in observability with Hubble provides flow visibility, service dependency mapping, and faster diagnosis of dropped, denied, or misrouted traffic.
- Optional kube-proxy replacement and eBPF service load balancing can simplify the datapath and improve scalability for high connection-rate workloads.
- Encryption in transit for pod-to-pod traffic using WireGuard or IPsec supports stronger zero-trust defaults on untrusted networks.
- Multi-cluster connectivity capabilities help enable cross-cluster service communication and more consistent policy enforcement across environments.
- Improved troubleshooting primitives with per-flow context and enriched telemetry reduce reliance on node-level packet captures and ad hoc debugging.
- Works well with platform engineering practices by enabling networking and security as code, with policy validation and auditability over time.
Cilium is a strong fit for production Kubernetes platforms that need higher throughput, deeper runtime visibility, or more expressive policy than baseline CNI plus NetworkPolicy typically provides. Trade-offs include added operational complexity, kernel and distribution compatibility constraints, and the need to validate eBPF behavior across node images and upgrade paths; the upstream Cilium documentation is a useful reference for supported modes and requirements.
Common alternatives include Calico, Flannel, and Weave Net, with different trade-offs around policy depth, observability, and operational simplicity.
Our experience with Cilium helped us build practical knowledge, reusable runbooks, and automation patterns for strengthening Kubernetes networking, security, and observability with eBPF across production clusters.
Some of the things we did include:
- Implemented and standardized Cilium as the CNI for new and existing Kubernetes clusters, including migration planning from legacy CNIs with phased cutovers, validation gates, and rollback procedures.
- Designed and enforced least-privilege connectivity using Kubernetes NetworkPolicies and CiliumNetworkPolicies, translating application requirements into auditable policies with clear ownership and review workflows.
- Rolled out egress controls and guardrails (DNS-aware and L7 where appropriate), reducing risky outbound access while keeping developer experience predictable and debuggable.
- Enabled kube-proxy replacement and tuned datapath settings to reduce overhead and improve latency under load, validating results with repeatable benchmarks and canary rollouts.
- Configured Hubble for flow visibility, incident triage, and policy validation, and connected telemetry into Prometheus and Grafana dashboards for actionable SLOs.
- Hardened cluster networking with encryption-in-transit where required, including key rotation considerations and performance impact analysis for different traffic profiles.
- Implemented ingress and traffic management patterns alongside Istio in environments that needed both service mesh features and kernel-level enforcement.
- Automated installation, upgrades, and configuration drift detection using GitOps practices with Argo CD, including environment overlays, version pinning, and safe upgrade runbooks.
- Validated multi-tenant and multi-namespace isolation models, documenting allowed flows and exception handling to support audits and reduce “tribal knowledge” dependencies.
- Built day-2 operational playbooks for common failure modes (policy regressions, node churn, MTU issues, conntrack pressure) and trained platform teams on safe operations and troubleshooting.
This experience helped us accumulate significant knowledge across multiple Cilium use-cases—migration, policy enforcement, observability, performance tuning, and day-2 operations—and enables us to deliver high-quality Cilium setups that are maintainable, measurable, and reliable in real production environments.
Some of the things we can help you do with Cilium include:
- Assess your current Kubernetes networking and security posture and deliver a prioritized findings report covering datapath, policy coverage, and operational risks.
- Define an adoption roadmap for rolling out eBPF-based networking across clusters with clear milestones, rollout patterns, and rollback controls.
- Implement and configure Cilium on new or existing Kubernetes clusters, including migration planning from legacy CNIs and safe cutover procedures.
- Design and enforce least-privilege network guardrails using Kubernetes NetworkPolicies and Cilium policy features to support compliance and reduce blast radius.
- Automate Cilium configuration and policy delivery with IaC and GitOps workflows (e.g., Terraform and Argo CD) so changes are versioned, reviewed, and promoted safely.
- Set up observability for flows, drops, DNS, and latency, aligning dashboards and alerts with SLOs and incident response runbooks.
- Optimize performance and cost by tuning datapath settings, reducing noisy east-west traffic, and right-sizing cluster and networking parameters.
- Troubleshoot service-to-service connectivity, DNS, and intermittent drops using eBPF-driven visibility to shorten MTTR.
- Harden day-2 operations with upgrade strategies, compatibility checks, rollback plans, and reusable runbooks for reliable multi-environment operations.
- Enable your teams with hands-on training and documentation for policy authoring, troubleshooting workflows, and ongoing Cilium operations.
