83 lines
3.6 KiB
Bash
83 lines
3.6 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROMETHEUS_RETENTION_TIME="${PROMETHEUS_RETENTION_TIME:-30d}"
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PROMETHEUS_RETENTION_SIZE="${PROMETHEUS_RETENTION_SIZE:-8GB}"
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if [[ "$(id -u)" -ne 0 ]]; then
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echo "Run as root." >&2
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exit 1
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fi
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if ! command -v apt-get >/dev/null 2>&1; then
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echo "This installer currently supports Debian/Ubuntu apt packages only." >&2
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exit 1
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fi
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log() { printf '\n[%s] %s\n' "$(date '+%F %T')" "$*"; }
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log "Installing Prometheus and Node Exporter packages"
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apt-get update
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DEBIAN_FRONTEND=noninteractive apt-get install -y prometheus prometheus-node-exporter curl iproute2
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prometheus_bin="$(command -v prometheus)"
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node_exporter_bin="$(command -v prometheus-node-exporter)"
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promtool_bin="$(command -v promtool)"
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backup_dir="/etc/prometheus/cmpp-backups/$(date '+%Y%m%d-%H%M%S')"
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mkdir -p "$backup_dir" /etc/systemd/system/prometheus.service.d /etc/systemd/system/prometheus-node-exporter.service.d
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for config_file in /etc/prometheus/prometheus.yml /etc/prometheus/cmpp-alerts.yml; do
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if [[ -f "$config_file" ]]; then
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cp --preserve=mode,timestamps "$config_file" "$backup_dir/$(basename "$config_file")"
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fi
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done
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if [[ -f /etc/systemd/system/prometheus.service.d/cmpp-monitoring.conf ]]; then
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cp --preserve=mode,timestamps /etc/systemd/system/prometheus.service.d/cmpp-monitoring.conf "$backup_dir/prometheus-service-override.conf"
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fi
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if [[ -f /etc/systemd/system/prometheus-node-exporter.service.d/cmpp-monitoring.conf ]]; then
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cp --preserve=mode,timestamps /etc/systemd/system/prometheus-node-exporter.service.d/cmpp-monitoring.conf "$backup_dir/node-exporter-service-override.conf"
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fi
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log "Installing platform-owned scrape and alert configuration"
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install -o root -g root -m 0644 "$SCRIPT_DIR/prometheus.yml" /etc/prometheus/prometheus.yml
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install -o root -g root -m 0644 "$SCRIPT_DIR/cmpp-alerts.yml" /etc/prometheus/cmpp-alerts.yml
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cat >/etc/systemd/system/prometheus.service.d/cmpp-monitoring.conf <<EOF
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[Service]
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ExecStart=
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ExecStart=${prometheus_bin} --config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus/metrics2 --storage.tsdb.retention.time=${PROMETHEUS_RETENTION_TIME} --storage.tsdb.retention.size=${PROMETHEUS_RETENTION_SIZE} --web.listen-address=127.0.0.1:9090
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EOF
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cat >/etc/systemd/system/prometheus-node-exporter.service.d/cmpp-monitoring.conf <<EOF
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[Service]
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ExecStart=
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ExecStart=${node_exporter_bin} --web.listen-address=127.0.0.1:9100 --collector.systemd --collector.systemd.unit-include='cmpp-api\\.service|cmpp-gateway\\.service|postgresql\\.service|redis(-server)?\\.service|cmpp-minio\\.service|nginx\\.service' --collector.filesystem.mount-points-exclude='^/(dev|proc|run/credentials/.+|sys|var/lib/docker/.+)($|/)'
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EOF
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log "Validating Prometheus configuration before restart"
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"$promtool_bin" check rules /etc/prometheus/cmpp-alerts.yml
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"$promtool_bin" check config /etc/prometheus/prometheus.yml
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systemctl daemon-reload
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systemctl enable prometheus prometheus-node-exporter
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systemctl restart prometheus-node-exporter
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systemctl restart prometheus
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for _ in $(seq 1 30); do
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if curl -fsS http://127.0.0.1:9090/-/ready >/dev/null; then
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break
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fi
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sleep 1
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done
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curl -fsS http://127.0.0.1:9090/-/ready >/dev/null
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curl -fsS http://127.0.0.1:9100/metrics >/dev/null
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if ss -lnt | grep -Eq '(^|[[:space:]])(0\.0\.0\.0|\[::\]):(9090|9100)([[:space:]]|$)'; then
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echo "Prometheus monitoring ports unexpectedly listen on a wildcard address." >&2
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exit 1
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fi
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log "Prometheus monitoring is ready on loopback only"
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echo "Configuration backup: $backup_dir"
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echo "The CMPP API and Gateway were not restarted."
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