mirror of
https://github.com/prometheus/prometheus.git
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8fdfa8abea
i) Uses the more idiomatic Wrap and Wrapf methods for creating nested errors. ii) Fixes some incorrect usages of fmt.Errorf where the error messages don't have any formatting directives. iii) Does away with the use of fmt package for errors in favour of pkg/errors Signed-off-by: tariqibrahim <tariq181290@gmail.com>
99 lines
3.6 KiB
Go
99 lines
3.6 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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"github.com/go-kit/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/pkg/errors"
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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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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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}
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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, l log.Logger) *HypervisorDiscovery {
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return &HypervisorDiscovery{provider: provider, authOpts: opts,
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region: region, port: port, logger: l}
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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, errors.Wrap(err, "could not authenticate to OpenStack")
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}
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client, err := openstack.NewComputeV2(h.provider, gophercloud.EndpointOpts{
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Region: h.region,
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})
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if err != nil {
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return nil, errors.Wrap(err, "could not create OpenStack compute session")
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}
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tg := &targetgroup.Group{
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Source: fmt.Sprintf("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)
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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, errors.Wrap(err, "could not extract hypervisors")
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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, fmt.Sprintf("%d", h.port))
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labels[model.AddressLabel] = model.LabelValue(addr)
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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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