Cyclops vs Flagger

Cyclops is a free, self-hosted web interface for managing Kubernetes clusters. It turns configuration into forms for deploying applications, while its dashboard summarizes cluster health, performance and resource use across pods, nodes, deployments and services. Users can create and update deployments, change replica counts, configure rolling updates and monitor progress. Teams can reuse versioned parameterized YAML templates, import Helm configuration and draw templates from GitHub, Helm chart or OCI repositories. Cyclops can also use Helm templates to build its new-module form and helps catch configuration problems before production. It installs into a Kubernetes cluster; setup requires a cluster and kubectl, with installation documented through kubectl or Glasskube. By default it can manage resources across the cluster, though installation can limit access to one namespace. In that mode, non-namespaced resources such as nodes and persistent volumes are not visible, and operations on them can fail. The cyctl command-line tool can manage Cyclops resources, initialize the product and start its UI. The maker also offers professional support and onboarding topics including workflow integration and custom-template creation.

Flagger is a self-hosted Kubernetes operator that automates progressive delivery for applications running on Kubernetes. It gradually shifts traffic to a new version while checking measures such as HTTP or gRPC request success and latency. Deployment approaches include canary releases, A/B testing, and blue/green deployments, routed through an ingress controller or a service mesh compatible with the Kubernetes Gateway API. Built-in checks cover HTTP request success rate and duration; teams can add custom metrics and webhooks for acceptance tests, load tests, or other validation. Release analysis can query systems including Prometheus, Datadog, CloudWatch, New Relic, Graphite, Dynatrace, InfluxDB, and Google Cloud Monitoring. If SLO analysis detects a performance drop, Flagger rolls back the release automatically. Manual controls allow approval, pausing, or resuming deployments, and notifications can go to Slack, Microsoft Teams, Discord, or Rocket. It is configured through Kubernetes custom resources, works with Kubernetes-compatible CI/CD solutions, and can be used with Flux for GitOps canary pipelines. Flagger is Apache 2.0 licensed and free.