204 lines
9.2 KiB
Bash
204 lines
9.2 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="${PROMETHEUS_RETENTION_SIZE:-8GB}"
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PROMETHEUS_VERSION="3.14.0"
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PROMETHEUS_SHA256_ARM64="077f3781ab7245dc04c9a3c9b78ba120fc8e41aa0dc97489b0af67247e50ba83"
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NODE_EXPORTER_VERSION="1.12.1"
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NODE_EXPORTER_SHA256_ARM64="ad35b605f9954b9f1ffddf5ba054bdc5a98d790b9eae5291e1eeb83f1ecbd0e7"
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MONITORING_RELEASE_CACHE_DIR="${MONITORING_RELEASE_CACHE_DIR:-}"
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if [[ "$(id -u)" -ne 0 ]]; then
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echo "Run as root." >&2
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exit 1
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fi
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log() { printf '\n[%s] %s\n' "$(date '+%F %T')" "$*"; }
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install_release_binary() {
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local url="$1" expected_sha256="$2" archive_member="$3" destination="$4"
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local work_dir archive asset_name
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work_dir="$(mktemp -d /tmp/cmpp-monitoring.XXXXXX)"
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archive="$work_dir/release.tar.gz"
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asset_name="${url##*/}"
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if [[ -n "$MONITORING_RELEASE_CACHE_DIR" && -f "$MONITORING_RELEASE_CACHE_DIR/$asset_name" ]]; then
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cp "$MONITORING_RELEASE_CACHE_DIR/$asset_name" "$archive"
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else
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curl -fL --retry 5 --retry-delay 2 --connect-timeout 15 -o "$archive" "$url"
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fi
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printf '%s %s\n' "$expected_sha256" "$archive" | sha256sum -c -
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tar -xzf "$archive" -C "$work_dir"
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install -o root -g root -m 0755 "$work_dir/$archive_member" "$destination"
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rm -rf -- "$work_dir"
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}
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install_official_arm64_releases() {
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[[ "$(uname -m)" == "aarch64" ]] || {
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echo "Official-binary installation currently supports Linux aarch64 only." >&2
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exit 1
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}
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for command_name in curl sha256sum tar; do
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command -v "$command_name" >/dev/null || { echo "Missing command: $command_name" >&2; exit 1; }
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done
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log "Installing checksum-pinned official Prometheus ARM64 releases"
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install_release_binary \
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"https://github.com/prometheus/prometheus/releases/download/v${PROMETHEUS_VERSION}/prometheus-${PROMETHEUS_VERSION}.linux-arm64.tar.gz" \
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"$PROMETHEUS_SHA256_ARM64" \
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"prometheus-${PROMETHEUS_VERSION}.linux-arm64/prometheus" \
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/usr/local/bin/prometheus
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install_release_binary \
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"https://github.com/prometheus/prometheus/releases/download/v${PROMETHEUS_VERSION}/prometheus-${PROMETHEUS_VERSION}.linux-arm64.tar.gz" \
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"$PROMETHEUS_SHA256_ARM64" \
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"prometheus-${PROMETHEUS_VERSION}.linux-arm64/promtool" \
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/usr/local/bin/promtool
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install_release_binary \
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"https://github.com/prometheus/node_exporter/releases/download/v${NODE_EXPORTER_VERSION}/node_exporter-${NODE_EXPORTER_VERSION}.linux-arm64.tar.gz" \
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"$NODE_EXPORTER_SHA256_ARM64" \
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"node_exporter-${NODE_EXPORTER_VERSION}.linux-arm64/node_exporter" \
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/usr/local/bin/prometheus-node-exporter
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getent group prometheus >/dev/null || groupadd --system prometheus
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id prometheus >/dev/null 2>&1 || useradd --system --gid prometheus --home-dir /var/lib/prometheus --shell /sbin/nologin prometheus
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install -d -o root -g root -m 0755 /etc/prometheus
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install -d -o prometheus -g prometheus -m 0750 /var/lib/prometheus/metrics2
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cat >/etc/systemd/system/prometheus.service <<'EOF'
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[Unit]
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Description=Prometheus monitoring server
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Wants=network-online.target
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After=network-online.target
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[Service]
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Type=simple
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User=prometheus
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Group=prometheus
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Restart=on-failure
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RestartSec=5s
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ExecStart=/usr/local/bin/prometheus
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[Install]
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WantedBy=multi-user.target
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EOF
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cat >/etc/systemd/system/prometheus-node-exporter.service <<'EOF'
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[Unit]
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Description=Prometheus Node Exporter
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Wants=network-online.target
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After=network-online.target
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[Service]
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Type=simple
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User=prometheus
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Group=prometheus
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Restart=on-failure
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RestartSec=5s
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ExecStart=/usr/local/bin/prometheus-node-exporter
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[Install]
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WantedBy=multi-user.target
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EOF
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}
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for command_name in systemctl install awk curl ss; do
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command -v "$command_name" >/dev/null || { echo "Missing command: $command_name" >&2; exit 1; }
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done
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if command -v apt-get >/dev/null 2>&1; then
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log "Installing Prometheus and Node Exporter packages"
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apt-get update
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DEBIAN_FRONTEND=noninteractive apt-get install -y prometheus prometheus-node-exporter curl iproute2
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else
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install_official_arm64_releases
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fi
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prometheus_bin="$(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 /etc/systemd/system/cmpp-api.service.d
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for config_file in /etc/prometheus/prometheus.yml /etc/prometheus/cmpp-alerts.yml /etc/prometheus/cmpp-alerts-source.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 "$backup_dir/node-exporter-service-override.conf"
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fi
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if [[ -f /etc/systemd/system/cmpp-api.service.d/monitoring-storage.conf ]]; then
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cp --preserve=mode,timestamps /etc/systemd/system/cmpp-api.service.d/monitoring-storage.conf "$backup_dir/cmpp-api-monitoring-storage.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-source.yml
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# 可配置规则由 API 管理；基础规则必须排除同名项，否则 Prometheus 会同时计算旧阈值和新阈值。
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awk '
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BEGIN {
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split("HostCpuUsageWarning HostCpuUsageCritical HostMemoryUsageWarning HostMemoryUsageCritical HostRootDiskUsageWarning HostRootDiskUsageCritical CmppApiHttpErrorRateWarning CmppApiHttpErrorRateCritical CmppApiLatencyWarning CmppApiLatencyCritical CmppApiEventLoopLagWarning CmppApiEventLoopLagCritical CmppGatewayQueueDelayedWarning CmppGatewayQueueDelayedCritical PostgresConnectionsWarning PostgresConnectionsCritical RedisMemoryWarning RedisMemoryCritical MinioCapacityWarning MinioCapacityCritical", names, " ")
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for (i in names) dropped[names[i]] = 1
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}
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/^ - name:/ { skip = 0 }
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/^ - alert:/ { skip = ($3 in dropped) }
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!skip { print }
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' "$SCRIPT_DIR/cmpp-alerts.yml" > /etc/prometheus/cmpp-alerts.yml
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chown root:root /etc/prometheus/cmpp-alerts.yml
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chmod 0644 /etc/prometheus/cmpp-alerts.yml
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# SGID ensures API原子rename生成的新规则继续继承prometheus组，否则reload会因不可读返回500。
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install -d -o cmpp-api -g prometheus -m 2750 /var/lib/cmpp-platform/monitoring
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if [[ ! -f /var/lib/cmpp-platform/monitoring/cmpp-managed-alerts.yml ]]; then
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install -o cmpp-api -g prometheus -m 0640 "$SCRIPT_DIR/cmpp-managed-alerts.yml" /var/lib/cmpp-platform/monitoring/cmpp-managed-alerts.yml
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fi
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chown cmpp-api:prometheus /var/lib/cmpp-platform/monitoring/cmpp-managed-alerts.yml
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chmod 0640 /var/lib/cmpp-platform/monitoring/cmpp-managed-alerts.yml
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# The API writes managed rules atomically. Its hardened unit otherwise sees /var/lib as read-only.
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cat >/etc/systemd/system/cmpp-api.service.d/monitoring-storage.conf <<'EOF'
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[Service]
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ReadWritePaths=/var/lib/cmpp-platform/monitoring
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EOF
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cat >/etc/systemd/system/prometheus.service.d/cmpp-monitoring.conf <<EOF
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[Service]
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ExecStart=
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ExecStart=${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 --web.enable-lifecycle
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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=${node_exporter_bin} --web.listen-address=127.0.0.1:9100 --collector.systemd --collector.systemd.unit-include='cmpp-api\\.service|cmpp-send-worker\\.service|cmpp-gateway\\.service|postgresql\\.service|redis(-server)?\\.service|cmpp-minio\\.service|nginx\\.service' --collector.filesystem.mount-points-exclude='^/(dev|proc|run/credentials/.+|sys|var/lib/docker/.+)($|/)'
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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 rules /var/lib/cmpp-platform/monitoring/cmpp-managed-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. Restart the API after setting PROMETHEUS_URL."
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