Add minimal types for prometheus and its blackbox exporter

type/__prometheus/files/prometheus.yml.sh

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+#!/bin/sh
+
+cat << EOF
+global:
+  scrape_interval:     ${GLOBAL_SCRAPE_INTERVAL:?} # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: ${GLOBAL_EVALUATION_INTERVAL:?} # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  external_labels: $EXTERNAL_LABELS
+
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets: [ $ALERTMANAGER_ADDR ]
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files: [ $RULE_FILES ]
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+EOF
+
+for config in $SCRAPE_JOB_CONFIGS; do
+	sed 's/^/  /' < "$config"
+done

type/__prometheus/manifest

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+#!/bin/sh
+
+os="$(cat "${__global:?}/explorer/os")"
+case "$os" in
+	alpine|debian|ubuntu)
+		__package prometheus
+		;;
+	*)
+		echo "This type does not supper $os. Exiting." >&2
+		exit 1
+		;;
+esac
+
+export GLOBAL_SCRAPE_INTERVAL=60s
+export GLOBAL_EVALUATION_INTERVAL=60s
+
+export EXTERNAL_LABELS=
+
+if [ -f "${__object:?}/parameter/alertmanager-addr" ]; then
+	ALERTMANAGER_ADDR=$(cat "${__object:?}/parameter/alertmanager-addr")
+fi
+export ALERTMANAGER_ADDR
+
+if [ -f "${__object:?}/parameter/rule-files" ]; then
+	RULE_FILES=$(cat "${__object:?}/parameter/rule-files")
+fi
+export RULE_FILES
+
+SCRAPE_JOB_CONFIGS=$(cat "${__object:?}/parameter/scrape-job-config")
+export SCRAPE_JOB_CONFIGS
+
+# Generate and deploy configuration
+mkdir -p "${__object:?}/files"
+"${__type:?}/files/prometheus.yml.sh" > "${__object:?}/files/prometheus.yml"
+
+require="__package/prometheus" __file /etc/prometheus/prometheus.yml \
+	--source "${__object:?}/files/prometheus.yml" \
+	--mode 0644 \
+	--onchange "service prometheus restart"
+
+require="__package/prometheus" __start_on_boot prometheus
+require="__package/prometheus" __service prometheus --action start

type/__prometheus/parameter/optional

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+alertmanager-addr
+rule_files

type/__prometheus/parameter/optional_multiple

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+scrape-job-config

type/__prometheus_blackbox_exporter/manifest

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+#!/bin/sh
+
+os="$(cat "${__global:?}/explorer/os")"
+case "$os" in
+	alpine)
+		__package blackbox_exporter
+		require="__package/blackbox_exporter" __start_on_boot \
+			blackbox_exporter
+		require="__package/blackbox_exporter" __service \
+			blackbox_exporter --action start
+		;;
+	debian|ubuntu)
+		__package prometheus-blackbox-exporter
+		;;
+	*)
+		echo "This type does not supper $os. Exiting." >&2
+		exit 1
+		;;
+esac