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111 lines
4.6 KiB
111 lines
4.6 KiB
// Copyright 2020 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package moby
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import (
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"context"
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"fmt"
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"net"
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"strconv"
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"github.com/docker/docker/api/types"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/util/strutil"
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)
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const (
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swarmLabelNodePrefix = swarmLabel + "node_"
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swarmLabelNodeAddress = swarmLabelNodePrefix + "address"
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swarmLabelNodeAvailability = swarmLabelNodePrefix + "availability"
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swarmLabelNodeEngineVersion = swarmLabelNodePrefix + "engine_version"
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swarmLabelNodeHostname = swarmLabelNodePrefix + "hostname"
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swarmLabelNodeID = swarmLabelNodePrefix + "id"
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swarmLabelNodeLabelPrefix = swarmLabelNodePrefix + "label_"
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swarmLabelNodeManagerAddr = swarmLabelNodePrefix + "manager_address"
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swarmLabelNodeManagerLeader = swarmLabelNodePrefix + "manager_leader"
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swarmLabelNodeManagerReachability = swarmLabelNodePrefix + "manager_reachability"
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swarmLabelNodePlatformArchitecture = swarmLabelNodePrefix + "platform_architecture"
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swarmLabelNodePlatformOS = swarmLabelNodePrefix + "platform_os"
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swarmLabelNodeRole = swarmLabelNodePrefix + "role"
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swarmLabelNodeStatus = swarmLabelNodePrefix + "status"
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)
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func (d *Discovery) refreshNodes(ctx context.Context) ([]*targetgroup.Group, error) {
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tg := &targetgroup.Group{
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Source: "DockerSwarm",
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}
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nodes, err := d.client.NodeList(ctx, types.NodeListOptions{Filters: d.filters})
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if err != nil {
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return nil, fmt.Errorf("error while listing swarm nodes: %w", err)
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}
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for _, n := range nodes {
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labels := model.LabelSet{
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swarmLabelNodeID: model.LabelValue(n.ID),
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swarmLabelNodeRole: model.LabelValue(n.Spec.Role),
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swarmLabelNodeAvailability: model.LabelValue(n.Spec.Availability),
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swarmLabelNodeHostname: model.LabelValue(n.Description.Hostname),
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swarmLabelNodePlatformArchitecture: model.LabelValue(n.Description.Platform.Architecture),
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swarmLabelNodePlatformOS: model.LabelValue(n.Description.Platform.OS),
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swarmLabelNodeEngineVersion: model.LabelValue(n.Description.Engine.EngineVersion),
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swarmLabelNodeStatus: model.LabelValue(n.Status.State),
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swarmLabelNodeAddress: model.LabelValue(n.Status.Addr),
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}
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if n.ManagerStatus != nil {
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labels[swarmLabelNodeManagerLeader] = model.LabelValue(strconv.FormatBool(n.ManagerStatus.Leader))
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labels[swarmLabelNodeManagerReachability] = model.LabelValue(n.ManagerStatus.Reachability)
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labels[swarmLabelNodeManagerAddr] = model.LabelValue(n.ManagerStatus.Addr)
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}
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for k, v := range n.Spec.Labels {
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ln := strutil.SanitizeLabelName(k)
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labels[model.LabelName(swarmLabelNodeLabelPrefix+ln)] = model.LabelValue(v)
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}
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addr := net.JoinHostPort(n.Status.Addr, strconv.FormatUint(uint64(d.port), 10))
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labels[model.AddressLabel] = model.LabelValue(addr)
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tg.Targets = append(tg.Targets, labels)
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}
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return []*targetgroup.Group{tg}, nil
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}
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func (d *Discovery) getNodesLabels(ctx context.Context) (map[string]map[string]string, error) {
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nodes, err := d.client.NodeList(ctx, types.NodeListOptions{})
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if err != nil {
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return nil, fmt.Errorf("error while listing swarm nodes: %w", err)
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}
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labels := make(map[string]map[string]string, len(nodes))
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for _, n := range nodes {
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labels[n.ID] = map[string]string{
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swarmLabelNodeID: n.ID,
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swarmLabelNodeRole: string(n.Spec.Role),
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swarmLabelNodeAddress: n.Status.Addr,
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swarmLabelNodeAvailability: string(n.Spec.Availability),
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swarmLabelNodeHostname: n.Description.Hostname,
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swarmLabelNodePlatformArchitecture: n.Description.Platform.Architecture,
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swarmLabelNodePlatformOS: n.Description.Platform.OS,
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swarmLabelNodeStatus: string(n.Status.State),
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}
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for k, v := range n.Spec.Labels {
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ln := strutil.SanitizeLabelName(k)
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labels[n.ID][swarmLabelNodeLabelPrefix+ln] = v
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}
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}
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return labels, nil
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}
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