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106 lines
3.9 KiB
Go
106 lines
3.9 KiB
Go
// Copyright 2017 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 openstack
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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/go-kit/log"
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"github.com/gophercloud/gophercloud"
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"github.com/gophercloud/gophercloud/openstack"
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"github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/hypervisors"
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"github.com/gophercloud/gophercloud/pagination"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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)
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const (
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openstackLabelHypervisorID = openstackLabelPrefix + "hypervisor_id"
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openstackLabelHypervisorHostIP = openstackLabelPrefix + "hypervisor_host_ip"
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openstackLabelHypervisorHostName = openstackLabelPrefix + "hypervisor_hostname"
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openstackLabelHypervisorStatus = openstackLabelPrefix + "hypervisor_status"
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openstackLabelHypervisorState = openstackLabelPrefix + "hypervisor_state"
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openstackLabelHypervisorType = openstackLabelPrefix + "hypervisor_type"
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)
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// HypervisorDiscovery discovers OpenStack hypervisors.
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type HypervisorDiscovery struct {
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provider *gophercloud.ProviderClient
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authOpts *gophercloud.AuthOptions
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region string
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logger log.Logger
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port int
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availability gophercloud.Availability
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}
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// newHypervisorDiscovery returns a new hypervisor discovery.
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func newHypervisorDiscovery(provider *gophercloud.ProviderClient, opts *gophercloud.AuthOptions,
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port int, region string, availability gophercloud.Availability, l log.Logger,
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) *HypervisorDiscovery {
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return &HypervisorDiscovery{
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provider: provider, authOpts: opts,
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region: region, port: port, availability: availability, logger: l,
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}
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}
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func (h *HypervisorDiscovery) refresh(ctx context.Context) ([]*targetgroup.Group, error) {
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h.provider.Context = ctx
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err := openstack.Authenticate(h.provider, *h.authOpts)
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if err != nil {
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return nil, fmt.Errorf("could not authenticate to OpenStack: %w", err)
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}
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client, err := openstack.NewComputeV2(h.provider, gophercloud.EndpointOpts{
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Region: h.region, Availability: h.availability,
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})
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if err != nil {
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return nil, fmt.Errorf("could not create OpenStack compute session: %w", err)
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}
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tg := &targetgroup.Group{
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Source: "OS_" + h.region,
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}
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// OpenStack API reference
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// https://developer.openstack.org/api-ref/compute/#list-hypervisors-details
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pagerHypervisors := hypervisors.List(client, nil)
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err = pagerHypervisors.EachPage(func(page pagination.Page) (bool, error) {
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hypervisorList, err := hypervisors.ExtractHypervisors(page)
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if err != nil {
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return false, fmt.Errorf("could not extract hypervisors: %w", err)
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}
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for _, hypervisor := range hypervisorList {
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labels := model.LabelSet{}
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addr := net.JoinHostPort(hypervisor.HostIP, strconv.Itoa(h.port))
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labels[model.AddressLabel] = model.LabelValue(addr)
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labels[openstackLabelHypervisorID] = model.LabelValue(hypervisor.ID)
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labels[openstackLabelHypervisorHostName] = model.LabelValue(hypervisor.HypervisorHostname)
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labels[openstackLabelHypervisorHostIP] = model.LabelValue(hypervisor.HostIP)
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labels[openstackLabelHypervisorStatus] = model.LabelValue(hypervisor.Status)
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labels[openstackLabelHypervisorState] = model.LabelValue(hypervisor.State)
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labels[openstackLabelHypervisorType] = model.LabelValue(hypervisor.HypervisorType)
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tg.Targets = append(tg.Targets, labels)
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}
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return true, nil
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})
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if err != nil {
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return nil, err
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}
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return []*targetgroup.Group{tg}, nil
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}
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