88 lines
3 KiB
Go
88 lines
3 KiB
Go
// This file is part of the happyDomain (R) project.
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// Copyright (c) 2020-2026 happyDomain
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// Authors: Pierre-Olivier Mercier, et al.
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//
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// This program is offered under a commercial and under the AGPL license.
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// For commercial licensing, contact us at <contact@happydomain.org>.
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//
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// For AGPL licensing:
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package checker
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import (
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"context"
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"fmt"
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sdk "git.happydns.org/checker-sdk-go/checker"
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)
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// packetLossRule evaluates the observed packet-loss ratio of each target
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// against the configured warning/critical thresholds.
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type packetLossRule struct{}
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func (r *packetLossRule) Name() string { return "ping.packet_loss" }
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func (r *packetLossRule) Description() string {
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return "Flags targets whose packet-loss ratio crosses the warning or critical threshold."
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}
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func (r *packetLossRule) ValidateOptions(opts sdk.CheckerOptions) error {
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warn := sdk.GetFloatOption(opts, "warningPacketLoss", 10)
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crit := sdk.GetFloatOption(opts, "criticalPacketLoss", 50)
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if warn < 0 || warn > 100 {
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return fmt.Errorf("warningPacketLoss must be between 0 and 100")
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}
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if crit < 0 || crit > 100 {
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return fmt.Errorf("criticalPacketLoss must be between 0 and 100")
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}
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if crit <= warn {
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return fmt.Errorf("criticalPacketLoss (%v) must be greater than warningPacketLoss (%v)", crit, warn)
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}
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return nil
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}
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func (r *packetLossRule) Evaluate(ctx context.Context, obs sdk.ObservationGetter, opts sdk.CheckerOptions) []sdk.CheckState {
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data, errSt := loadPingData(ctx, obs)
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if errSt != nil {
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return []sdk.CheckState{*errSt}
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}
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if len(data.Targets) == 0 {
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return []sdk.CheckState{noTargetsState("ping.packet_loss.no_targets")}
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}
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warn := sdk.GetFloatOption(opts, "warningPacketLoss", 10)
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crit := sdk.GetFloatOption(opts, "criticalPacketLoss", 50)
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out := make([]sdk.CheckState, 0, len(data.Targets))
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for _, t := range data.Targets {
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state := sdk.CheckState{
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Subject: t.Address,
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Message: fmt.Sprintf("Packet loss %.0f%% (warn=%.0f%%, crit=%.0f%%).", t.PacketLoss, warn, crit),
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Meta: map[string]any{"target": t},
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}
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switch {
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case t.PacketLoss >= crit:
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state.Status = sdk.StatusCrit
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state.Code = "ping.packet_loss.critical"
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case t.PacketLoss >= warn:
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state.Status = sdk.StatusWarn
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state.Code = "ping.packet_loss.warning"
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default:
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state.Status = sdk.StatusOK
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state.Code = "ping.packet_loss.ok"
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}
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out = append(out, state)
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}
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return out
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}
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