170 lines
7.4 KiB
Bash
170 lines
7.4 KiB
Bash
# Shared config loading. Sourced, never executed.
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#
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# The ecosystem convention is that scripts are standalone with no shared log
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# library — that still holds. This file is not a logging lib; it is the single
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# definition of how the config layers compose, which every script has to agree
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# on exactly. Precedence, weakest first:
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#
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# ctrl/versions.env pinned toolchain + image digests (committed)
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# ctrl/env.d/<profile> cluster shape (committed)
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# ctrl/.env machine-local values and secrets (gitignored)
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# the caller's env `make cluster up PROFILE=client` (always wins)
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#
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# That last rule is why this is more than a few `source` lines: .env sets
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# PROFILE, so without snapshotting it would silently override the PROFILE the
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# user just typed on the command line.
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#
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# Run from ctrl/.
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# Values a user can reasonably override per-invocation. Anything set in the
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# environment when load_config runs is restored after the files are read.
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# NODES and AUDIT are deliberately NOT here: they are properties of the chosen
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# ctrl/k8s/kind-config*.yaml.tpl and are read back out of it below, so there is
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# one place that decides the shape of the cluster rather than two that can drift.
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#
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# REGISTRY_PORT and MANIFESTS_DIR were missing here while ctrl/.env set them, so
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# the caller's env silently LOST to the file for those two — the one precedence
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# rule this header states. Both are now listed; the other twelve are unchanged.
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CONFIG_OVERRIDABLE="PROFILE CLUSTER K8S_VERSION KIND_CONFIG ADDONS
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REGISTRY_MODE INGRESS_MODE DNS_MODE TILT_PORT
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SOURCE ARCH DEPS_SOURCE HTTP_PORT HTTPS_PORT
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REGISTRY_PORT MANIFESTS_DIR"
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# The containing folder's name, reduced to something kind accepts as a cluster
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# name (a DNS label: lowercase alphanumerics and dashes). Run from ctrl/, so the
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# repo root is the parent.
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default_cluster_name() {
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local n
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n=$(basename "$(cd .. && pwd)")
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n=$(echo "$n" | tr '[:upper:]' '[:lower:]' | tr -c 'a-z0-9-' '-')
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n=$(echo "$n" | sed 's/^-*//; s/-*$//')
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echo "${n:-rig}"
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}
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# Base of this environment's 10-port block. cksum is used rather than $RANDOM or
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# bash hashing because it is POSIX and returns the same value on every machine,
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# which is what makes the block reproducible instead of merely unique.
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derive_port_base() {
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local h; h=$(printf '%s' "$1" | cksum | awk '{print $1}')
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echo $((20000 + (h % 200) * 10))
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}
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load_config() {
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local k saved=""
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for k in $CONFIG_OVERRIDABLE; do
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# ${!k+x} distinguishes "set but empty" from "unset" — an explicit
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# FOO= on the command line is a real choice and must survive.
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if [ -n "${!k+x}" ]; then
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saved+="$k=$(printf '%q' "${!k}")"$'\n'
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fi
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done
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set -a
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source ./versions.env
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[ -f ./.env ] && source ./.env
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set +a
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# Re-apply overrides now so PROFILE is the caller's before we pick the file.
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_config_restore "$saved"
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local profile="${PROFILE:-minimal}"
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if [ ! -f "./env.d/${profile}.env" ]; then
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echo "no such profile: env.d/${profile}.env" >&2
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echo "available: $(ls env.d/*.env 2>/dev/null | xargs -n1 basename | sed 's/\.env$//' | tr '\n' ' ')" >&2
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exit 1
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fi
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set -a
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source "./env.d/${profile}.env"
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[ -f ./.env ] && source ./.env
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set +a
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_config_restore "$saved"
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# Identity follows the FOLDER, so copying this directory somewhere else and
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# renaming it yields a distinct environment with no further edits. Without
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# this, two copies would share one cluster and `make cluster down` in either
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# would destroy the other's.
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CLUSTER="${CLUSTER:-$(default_cluster_name)}"
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KUBECONTEXT="kind-${CLUSTER}"
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# Host ports are a single shared namespace, so unlike the cluster name they
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# cannot just follow the directory — they have to be spread out. Anything
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# already set (ctrl/.env, a profile, the command line) wins; only the gaps
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# are filled. See ports.sh for the reasoning.
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local base; base=$(derive_port_base "$CLUSTER")
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HTTP_PORT="${HTTP_PORT:-$base}"
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HTTPS_PORT="${HTTPS_PORT:-$((base + 1))}"
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TILT_PORT="${TILT_PORT:-$((base + 2))}"
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REGISTRY_PORT="${REGISTRY_PORT:-$((base + 3))}"
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# Where the workload's manifests live, repo-root relative. Defaulted here so
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# it is always resolved rather than sometimes-set: it is the seam that lets
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# the real manifests be versioned away from the installer, and a consumer
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# should not have to know whether anyone filled it in. See k8s/README.md.
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MANIFESTS_DIR="${MANIFESTS_DIR:-ctrl/k8s/overlays/dev}"
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# Profiles name a k8s minor (v1_36); versions.env holds the pinned digest.
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local var="NODE_IMAGE_${K8S_VERSION}"
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NODE_IMAGE="${!var:-}"
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if [ -z "$NODE_IMAGE" ]; then
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echo "K8S_VERSION='${K8S_VERSION}' has no NODE_IMAGE_${K8S_VERSION} in versions.env" >&2
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exit 1
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fi
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# The cluster's shape is a file in ctrl/k8s/, named by the profile. Adding a
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# shape is adding a file; there is no dispatcher to edit.
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#
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# A host that needs its own shape — extra port mappings, more nodes — passes
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# an absolute path instead, and rig renders it exactly like one of its own:
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# ${CLUSTER} and ${NODE_IMAGE} are substituted either way. The shape stays in
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# the host's tree, because what a host's cluster needs is the host's business;
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# rig only knows how to build whatever it is handed.
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KIND_CONFIG="${KIND_CONFIG:-kind-config.yaml.tpl}"
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case "$KIND_CONFIG" in
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/*) KIND_CONFIG_PATH="$KIND_CONFIG"; KIND_CONFIG_SHOWN="$KIND_CONFIG" ;;
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*) KIND_CONFIG_PATH="./k8s/${KIND_CONFIG}"; KIND_CONFIG_SHOWN="ctrl/k8s/${KIND_CONFIG}" ;;
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esac
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if [ ! -f "$KIND_CONFIG_PATH" ]; then
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echo "no such cluster shape: ${KIND_CONFIG_SHOWN}" >&2
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echo "rig's own: $(ls k8s/kind-config*.yaml.tpl 2>/dev/null | xargs -n1 basename | tr '\n' ' ')" >&2
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echo "or pass an absolute path to a shape of your own" >&2
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exit 1
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fi
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# Read the shape back out of the YAML rather than trusting a profile to
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# restate it. check.sh sizes the memory warning on NODES, and cluster.sh
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# prints AUDIT before spending minutes building something that cannot be
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# changed afterwards — both would mislead if the numbers drifted.
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NODES=$(grep -c '^ - role:' "$KIND_CONFIG_PATH")
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if grep -q 'audit-policy-file' "$KIND_CONFIG_PATH"; then AUDIT=on; else AUDIT=off; fi
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}
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# Render a cluster shape to stdout. sed rather than envsubst: envsubst is
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# gettext-base, absent from a minimal Debian, and Docker is meant to be the only
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# prerequisite. The variable list is explicit so a template cannot quietly start
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# depending on something the caller does not set.
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#
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# hostPath entries are resolved by the HOST dockerd, so HOST_WORKDIR must stay a
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# host path even when this runs inside the installer container.
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render_kind_config() {
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local host_workdir="${HOST_WORKDIR:-$(cd .. && pwd)}"
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sed -e "s|\${CLUSTER}|${CLUSTER}|g" \
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-e "s|\${NODE_IMAGE}|${NODE_IMAGE}|g" \
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-e "s|\${HTTP_PORT}|${HTTP_PORT}|g" \
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-e "s|\${HOST_WORKDIR}|${host_workdir}|g" \
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"$KIND_CONFIG_PATH"
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}
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_config_restore() {
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local line
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while IFS= read -r line; do
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if [ -n "$line" ]; then
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eval "export $line"
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fi
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done <<< "$1"
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# A while loop returns its last body command's status; the trailing empty
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# line would otherwise make this return 1 and trip `set -e` in the caller.
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return 0
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}
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