overthinkos/k3s
infrastructure/skills/k3s/SKILL.md
k3s binary installer (common base for k3s-server and k3s-agent). Use when building images that need the k3s binary but do NOT want a server/agent service started automatically.
development
Updated Jun 22, 2026
$ install --global
skillsauthnpx skillsauth add overthinkos/overthink-plugins k3sInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Jun 22, 2026, 6:37 AM83.2s1 file scanned
SKILL.md
- name:
- k3s
- description:
- |
k3s -- k3s binary installer (base layer)
Candy Properties
| Property | Value |
|----------|-------|
| Install files | charly.yml (binary fetch + symlinks via a run: plan step) |
| Pinned version | v1.31.11+k3s1 (edit K3S_VERSION in charly.yml vars to cut over) |
What this candy does
Downloads the verified-checksum k3s binary (plus sha256sum from the
release manifest), installs it to /usr/local/bin/k3s, and creates
symlinks for kubectl, crictl, ctr (k3s is multi-call). Installs
runtime dependencies (iptables, conntrack, socat, ethtool,
ca-certificates) via the distro package manager — not via the
upstream curl | sh installer. Deliberate, per R9.
No service is started by this candy. Role selection happens in the
dependent candies /charly-infrastructure:k3s-server and /charly-infrastructure:k3s-agent,
which emit systemd units that wrap this binary with the right CLI verb
(k3s server vs k3s agent).
Usage
Typically not used directly — compose /charly-infrastructure:k3s-server or
/charly-infrastructure:k3s-agent (both depend on this candy).
# For a bare binary-only image (rare) — a box composes the candy through a
# <box>-candy child node (node-form: every non-scalar field is its own node):
k3s-base:
candy:
base: fedora
k3s-base-candy:
candy:
- k3s
Cross-distro coverage
rpm:(Fedora) —conntrack-tools,iptables,ethtool,socat,ca-certificatespac:(Arch) —conntrack-tools,iptables-nft,ethtool,socat,ca-certificatesdeb:(Debian/Ubuntu) —conntrack,iptables,ethtool,socat,ca-certificates
Tests
k3s --versionmatches pinned version./usr/local/bin/k3sis mode 0755./usr/local/bin/kubectlexists as a symlink.- Each runtime package is installed (per-distro
package_maphandles Debian'sconntrackrename).
Related Candies
/charly-infrastructure:k3s-server— Control-plane node (depends on this candy)/charly-infrastructure:k3s-agent— Worker node (depends on this candy)/charly-coder:kubernetes-layer— Distrokubectl/helmbinaries for the operator, not the cluster
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