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47 lines
1.5 KiB
Bash
47 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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# Bootstrap the first K3s server (embedded etcd) on raspberry.knoe.org using k3sup.
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# This script is idempotent: re-running will upgrade/ensure k3s is present.
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# Requirements:
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# - k3sup installed locally (https://github.com/alexellis/k3sup)
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# - SSH access to the target host
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# - The target host must have ports 6443/tcp, 10250/tcp open locally
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set -euo pipefail
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# Configurable via env vars; provide sensible defaults
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: "${K3S_FIRST_SERVER_HOST:=raspberry.prole.org}"
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: "${K3S_FIRST_SERVER_USER:=pi}"
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: "${K3S_SSH_KEY:=$HOME/.ssh/id_rsa}"
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: "${K3S_VERSION:=}"
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# Extra args to pass directly to k3s server
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K3S_EXTRA_ARGS_DEFAULT="--cluster-init"
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: "${K3S_EXTRA_ARGS:=${K3S_EXTRA_ARGS_DEFAULT}}"
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echo "[info] Installing first K3s server on ${K3S_FIRST_SERVER_HOST} (user=${K3S_FIRST_SERVER_USER})"
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if ! command -v k3sup >/dev/null 2>&1; then
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echo "[error] k3sup is not installed. See https://github.com/alexellis/k3sup" >&2
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exit 1
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fi
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K3SUP_ARGS=(install \
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--ip "${K3S_FIRST_SERVER_HOST}" \
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--user "${K3S_FIRST_SERVER_USER}" \
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--ssh-key "${K3S_SSH_KEY}" \
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--k3s-extra-args "${K3S_EXTRA_ARGS}"
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)
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if [[ -n "${K3S_VERSION}" ]]; then
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K3SUP_ARGS+=(--k3s-version "${K3S_VERSION}")
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fi
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# Create/merge kubeconfig in ~/.kube/config with context named after host
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K3SUP_ARGS+=(--local-path "$HOME/.kube/config" --context "k3s-${K3S_FIRST_SERVER_HOST}")
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set -x
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k3sup "${K3SUP_ARGS[@]}"
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set +x
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echo "[ok] First K3s server installed with embedded etcd and context 'k3s-${K3S_FIRST_SERVER_HOST}'"
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