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feat: add linode SD failure count metric (#10673)

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This commit introduces a new metric to count the number of failed
requests to Linode's API when using Linode SD. Resolves #10672, inspired
by #10476.

_Note_: this doens't count failures when polling the `/account/events`
endpoint, as a `401` there is how we determine if the supplied token has
the needed API scopes to do event polling vs full refreshes each
interval.

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>
This commit is contained in:
TJ Hoplock 2022-05-11 10:54:08 -04:00 committed by GitHub
parent 78f2645787
commit c40e269c3e
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 6 deletions
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24
discovery/linode/linode.go
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@ -25,6 +25,7 @@ import (
"github.com/go-kit/log" "github.com/go-kit/log"
"github.com/linode/linodego" "github.com/linode/linodego"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/config" "github.com/prometheus/common/config"
"github.com/prometheus/common/model" "github.com/prometheus/common/model"
"github.com/prometheus/common/version" "github.com/prometheus/common/version"
@ -65,15 +66,24 @@ const (
) )
// DefaultSDConfig is the default Linode SD configuration. // DefaultSDConfig is the default Linode SD configuration.
var DefaultSDConfig = SDConfig{ var (
TagSeparator: ",", DefaultSDConfig = SDConfig{
Port: 80, TagSeparator: ",",
RefreshInterval: model.Duration(60 * time.Second), Port: 80,
HTTPClientConfig: config.DefaultHTTPClientConfig, RefreshInterval: model.Duration(60 * time.Second),
} HTTPClientConfig: config.DefaultHTTPClientConfig,
}
failuresCount = prometheus.NewCounter(
prometheus.CounterOpts{
Name: "prometheus_sd_linode_failures_total",
Help: "Number of Linode service discovery refresh failures.",
})
)
func init() { func init() {
discovery.RegisterConfig(&SDConfig{}) discovery.RegisterConfig(&SDConfig{})
prometheus.MustRegister(failuresCount)
} }
// SDConfig is the configuration for Linode based service discovery. // SDConfig is the configuration for Linode based service discovery.
@ -211,12 +221,14 @@ func (d *Discovery) refreshData(ctx context.Context) ([]*targetgroup.Group, erro
// Gather all linode instances. // Gather all linode instances.
instances, err := d.client.ListInstances(ctx, &linodego.ListOptions{PageSize: 500}) instances, err := d.client.ListInstances(ctx, &linodego.ListOptions{PageSize: 500})
if err != nil { if err != nil {
failuresCount.Inc()
return nil, err return nil, err
} }
// Gather detailed IP address info for all IPs on all linode instances. // Gather detailed IP address info for all IPs on all linode instances.
detailedIPs, err := d.client.ListIPAddresses(ctx, &linodego.ListOptions{PageSize: 500}) detailedIPs, err := d.client.ListIPAddresses(ctx, &linodego.ListOptions{PageSize: 500})
if err != nil { if err != nil {
failuresCount.Inc()
return nil, err return nil, err
} }