refactor: remove edge memory overrides, default to upstream Kubernetes [KS-68]

[stevensbkang]

KubeSolo shipped a set of "edge" overrides (gated behind the --full flag) intended to reduce memory use on constrained nodes. A controlled A/B on identical hardware — full vs. edge, scraped into Prometheus via cAdvisor on the kubesolo.service cgroup — showed the savings are marginal: ~15 MB RSS (~5.6%) and ~0.004 cores (~12% relative) at idle. That does not justify maintaining ~60 divergent flags across five components, so the overrides are removed and KubeSolo now always uses upstream Kubernetes and containerd defaults.

Changes:

• Delete all !fullMode override blocks: kubelet, controller-manager, apiserver, kube-proxy, and containerd (CRI images + GC scheduler).
• Remove fullMode plumbing: service struct fields/constructors, kubeproxy.NewService signature, types.Embedded.FullMode, the kubesolo struct field, and the edge/full startup "profile" log line.
• Keep --full / KUBESOLO_FULL as a deprecated no-op for backwards compatibility: it still parses and logs a warning when set, and will be removed in a future release. Existing units/scripts do not break.
• Update kubelet config tests, install.sh, and the README / container-mode / cni / kubesoloctl docs.

Note: this reverts to upstream behaviour, which lifts maxPods 20->110, relaxes eviction thresholds, and re-enables the pprof/debug handlers on every node. These are behavioural and security-surface changes, not memory tuning. The containerMode adjustments are unaffected

[linear]

KS-68

[Copilot]

Pull request overview

Removes the legacy “edge” memory-override profile and associated fullMode plumbing so KubeSolo consistently uses upstream Kubernetes/containerd defaults, while keeping --full/KUBESOLO_FULL as a deprecated no-op for backward compatibility.

Changes:

• Deleted all !fullMode override blocks across Kubernetes components and containerd.
• Removed FullMode/fullMode fields and constructor parameters throughout the service wiring.
• Updated flag help text and docs to mark --full as deprecated/no-op, plus adjusted kubelet config tests and installer behavior.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
types/types.go	Removes Embedded.FullMode from shared config struct.
README.md	Updates --full flag documentation to reflect deprecation.
pkg/runtime/containerd/service.go	Removes fullMode from containerd service struct initialization.
pkg/runtime/containerd/config.go	Drops edge-only CRI image overrides and GC scheduler plugin config.
pkg/kubernetes/kubeproxy/service.go	Removes fullMode from kube-proxy service wiring and constructor signature.
pkg/kubernetes/kubeproxy/flags.go	Removes edge-only kube-proxy flag tuning gated by !fullMode.
pkg/kubernetes/kubelet/service.go	Removes fullMode from kubelet service wiring.
pkg/kubernetes/kubelet/config.go	Removes edge-only kubelet config overrides, leaving container-mode adjustments intact.
pkg/kubernetes/kubelet/config_test.go	Updates tests to validate upstream-default behavior (and container-mode behavior) without full/edge modes.
pkg/kubernetes/controller/service.go	Removes fullMode from controller-manager service wiring.
pkg/kubernetes/controller/flags.go	Removes edge-only controller-manager flag overrides gated by !fullMode.
pkg/kubernetes/apiserver/service.go	Removes fullMode from apiserver service wiring.
pkg/kubernetes/apiserver/flags.go	Removes edge-only apiserver flag overrides gated by !fullMode.
internal/config/flags/flags.go	Marks --full as deprecated/no-op in CLI help text.
install.sh	Stops propagating KUBESOLO_FULL into generated command args.
docs/installation/kubesoloctl.md	Removes container-mode explanation tying behavior to --full.
docs/configuration/container-mode.md	Updates wording to reflect upstream defaults plus container-mode adjustments.
docs/configuration/cni.md	Removes advice to use --full for Cilium.
cmd/kubesolo/main.go	Removes “profile” startup log; logs a deprecation warning when --full is set; updates kube-proxy constructor call.

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