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|
# File 'manifests/server.pp', line 1
class prometheus::server (
String $image = 'prom/prometheus',
String $version = '2.2.1',
String $reloader_image = 'jimmidyson/configmap-reload',
String $reloader_version = '0.1',
String $retention = '720h', # 30 days
Integer[1025,65535] $port = 9090,
String $external_url = '',
Boolean $persistent_volume = false,
Integer $persistent_volume_size = 15,
String $kubernetes_token_file = '/var/run/secrets/kubernetes.io/serviceaccount/token',
String $kubernetes_ca_file = '/var/run/secrets/kubernetes.io/serviceaccount/ca.crt',
Hash[String,String] $external_labels = {},
)
{
require ::kubernetes
include ::prometheus
$namespace = $::prometheus::namespace
$authorization_mode = $::kubernetes::_authorization_mode
if member($authorization_mode, 'RBAC'){
$rbac_enabled = true
} else {
$rbac_enabled = false
}
if versioncmp($::kubernetes::version, '1.6.0') >= 0 {
$version_before_1_6 = false
} else {
$version_before_1_6 = true
}
kubernetes::apply{'prometheus-server':
manifests => [
template('prometheus/prometheus-ns.yaml.erb'),
template('prometheus/prometheus-deployment.yaml.erb'),
template('prometheus/prometheus-svc.yaml.erb'),
],
}
kubernetes::apply{'prometheus-config':
type => 'concat',
}
kubernetes::apply_fragment { 'prometheus-config-header':
content => template('prometheus/prometheus-config-header.yaml.erb'),
order => 0,
target => 'prometheus-config',
}
kubernetes::apply_fragment { 'prometheus-config-prometheus-file':
content => ' prometheus.yaml: |-',
order => 100,
target => 'prometheus-config',
}
kubernetes::apply_fragment { 'prometheus-config-prometheus-rules':
content => template('prometheus/prometheus-config-rules.yaml.erb'),
order => 200,
target => 'prometheus-config',
}
kubernetes::apply_fragment { 'prometheus-config-global':
content => template('prometheus/prometheus-config-global.yaml.erb'),
order => 300,
target => 'prometheus-config',
}
kubernetes::apply_fragment { 'prometheus-config-global-pre-scrape-config':
content => ' scrape_configs:',
order => 400,
target => 'prometheus-config',
}
$external_scrape_targets_only = $::prometheus::external_scrape_targets_only
if ! $external_scrape_targets_only {
# Scrape config for API servers.
#
# Kubernetes exposes API servers as endpoints to the default/kubernetes
# service so this uses `endpoints` role and uses relabelling to only keep
# the endpoints associated with the default/kubernetes service using the
# default named port `https`. This works for single API server deployments as
# well as HA API server deployments.
prometheus::scrape_config { 'kubernetes-apiservers':
order => 100,
config => {
'kubernetes_sd_configs' => [{
'role' => 'endpoints',
}],
'tls_config' => {
'ca_file' => $kubernetes_ca_file,
},
'bearer_token_file' => $kubernetes_token_file,
'scheme' => 'https',
'relabel_configs' => [{
'source_labels' => ['__meta_kubernetes_namespace', '__meta_kubernetes_service_name', '__meta_kubernetes_endpoint_port_name'],
'action' => 'keep',
'regex' => 'default;kubernetes;https',
}],
}
}
# Scrape config for master's schedulers and controller manager (kubelet).
#
# Rather than connecting directly to the node, the scrape is proxied though the
# Kubernetes apiserver. This means it will work if Prometheus is running out of
# cluster, or can't connect to nodes for some other reason (e.g. because of
# firewalling).
prometheus::scrape_config { 'kubernetes-schedulers':
order => 110,
config => {
'kubernetes_sd_configs' => [{
'role' => 'node',
}],
'tls_config' => {
'ca_file' => $kubernetes_ca_file,
},
'bearer_token_file' => $kubernetes_token_file,
'scheme' => 'https',
'relabel_configs' => [{
'source_labels' => ['__meta_kubernetes_node_label_role'],
'action' => 'keep',
'regex' => 'master',
},{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_node_label_(.+)',
},{
'target_label' => '__address__',
'replacement' => 'kubernetes.default.svc:443',
}, {
'source_labels' => ['__meta_kubernetes_node_name'],
'regex' => '(.+)',
'target_label' => '__metrics_path__',
'replacement' => '/api/v1/nodes/${1}:10251/proxy/metrics',
}],
}
}
prometheus::scrape_config { 'kubernetes-controller-managers':
order => 110,
config => {
'kubernetes_sd_configs' => [{
'role' => 'node',
}],
'tls_config' => {
'ca_file' => $kubernetes_ca_file,
},
'bearer_token_file' => $kubernetes_token_file,
'scheme' => 'https',
'relabel_configs' => [{
'source_labels' => ['__meta_kubernetes_node_label_role'],
'action' => 'keep',
'regex' => 'master',
},{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_node_label_(.+)',
},{
'target_label' => '__address__',
'replacement' => 'kubernetes.default.svc:443',
}, {
'source_labels' => ['__meta_kubernetes_node_name'],
'regex' => '(.+)',
'target_label' => '__metrics_path__',
'replacement' => '/api/v1/nodes/${1}:10252/proxy/metrics',
}],
}
}
# Scrape config for nodes (kubelet).
#
# Rather than connecting directly to the node, the scrape is proxied though the
# Kubernetes apiserver. This means it will work if Prometheus is running out of
# cluster, or can't connect to nodes for some other reason (e.g. because of
# firewalling).
prometheus::scrape_config { 'kubernetes-nodes':
order => 110,
config => {
'kubernetes_sd_configs' => [{
'role' => 'node',
}],
'tls_config' => {
'ca_file' => $kubernetes_ca_file,
},
'bearer_token_file' => $kubernetes_token_file,
'scheme' => 'https',
'relabel_configs' => [{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_node_label_(.+)',
},{
'target_label' => '__address__',
'replacement' => 'kubernetes.default.svc:443',
}, {
'source_labels' => ['__meta_kubernetes_node_name'],
'regex' => '(.+)',
'target_label' => '__metrics_path__',
'replacement' => '/api/v1/nodes/${1}/proxy/metrics',
}],
}
}
# Scrape config for Kubelet cAdvisor.
#
# This is required for Kubernetes 1.7.3 and later, where cAdvisor metrics
# (those whose names begin with 'container_') have been removed from the
# Kubelet metrics endpoint. This job scrapes the cAdvisor endpoint to
# retrieve those metrics.
#
# In Kubernetes 1.7.0-1.7.2, these metrics are only exposed on the cAdvisor
# HTTP endpoint; use "replacement: /api/v1/nodes/${1}:4194/proxy/metrics"
# in that case (and ensure cAdvisor's HTTP server hasn't been disabled with
# the --cadvisor-port=0 Kubelet flag).
#
# This job is not necessary and should be removed in Kubernetes 1.6 and
# earlier versions, or it will cause the metrics to be scraped twice.
prometheus::scrape_config { 'kubernetes-nodes-cadvisor':
order => 120,
config => {
'kubernetes_sd_configs' => [{
'role' => 'node',
}],
'tls_config' => {
'ca_file' => $kubernetes_ca_file,
},
'bearer_token_file' => $kubernetes_token_file,
'scheme' => 'https',
'relabel_configs' => [{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_node_label_(.+)',
},{
'target_label' => '__address__',
'replacement' => 'kubernetes.default.svc:443',
}, {
'source_labels' => ['__meta_kubernetes_node_name'],
'regex' => '(.+)',
'target_label' => '__metrics_path__',
'replacement' => '/api/v1/nodes/${1}/proxy/metrics/cadvisor',
}],
}
}
# Scrape config for service endpoints.
#
# The relabeling allows the actual service scrape endpoint to be configured
# via the following annotations:
#
# * `prometheus.io/scrape`: Only scrape services that have a value of `true`
# * `prometheus.io/scheme`: If the metrics endpoint is secured then you will need
# to set this to `https` & most likely set the `tls_config` of the scrape config.
# * `prometheus.io/path`: If the metrics path is not `/metrics` override this.
# * `prometheus.io/port`: If the metrics are exposed on a different port to the
# service then set this appropriately.
prometheus::scrape_config { 'kubernetes-service-endpoints':
order => 200,
config => {
'kubernetes_sd_configs' => [{
'role' => 'endpoints',
}],
'relabel_configs' => [
{
'source_labels' => ['__meta_kubernetes_service_annotation_prometheus_io_scrape'],
'action' => 'keep',
'regex' => true,
},
{
'source_labels' => ['__meta_kubernetes_service_annotation_prometheus_io_scheme'],
'action' => 'replace',
'target_label' => '__scheme__',
'regex' => '(https?)',
},
{
'source_labels' => ['__meta_kubernetes_service_annotation_prometheus_io_path'],
'action' => 'replace',
'target_label' => '__metrics_path__',
'regex' => '(.+)',
},
{
'source_labels' => ['__address__', '__meta_kubernetes_service_annotation_prometheus_io_port'],
'action' => 'replace',
'target_label' => '__address__',
'regex' => '(.+)(?::\d+);(\d+)',
'replacement' => '$1:$2',
},
{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_service_label_(.+)',
},
{
'source_labels' => ['__meta_kubernetes_namespace'],
'action' => 'replace',
'target_label' => 'kubernetes_namespace',
},
{
'source_labels' => ['__meta_kubernetes_service_name'],
'action' => 'replace',
'target_label' => 'kubernetes_name',
}
]
}
}
# Example scrape config for probing services via the Blackbox Exporter.
#
# The relabeling allows the actual service scrape endpoint to be configured
# via the following annotations:
#
# * `prometheus.io/probe`: Only probe services that have a value of `true`
prometheus::scrape_config { 'kubernetes-services':
order => 210,
config => {
'kubernetes_sd_configs' => [{
'role' => 'service'
}],
'metrics_path' => '/probe',
'params' => {
'module' => ['http_2xx'],
},
'relabel_configs' => [
{
'source_labels' => ['__meta_kubernetes_service_annotation_prometheus_io_probe'],
'action' => 'keep',
'regex' => true,
},
{
'source_labels' => ['__address__'],
'target_label' => '__param_target',
},
{
'target_label' => '__address__',
'replacement' => 'blackbox-exporter',
},
{
'source_labels' => ['__param_target'],
'target_label' => 'instance',
},
{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_service_label_(.+)',
},
{
'source_labels' => ['__meta_kubernetes_service_namespace'],
'target_label' => 'kubernetes_namespace',
},
{
'source_labels' => ['__meta_kubernetes_service_name'],
'target_label' => 'kubernetes_name',
},
]
},
}
# Example scrape config for probing ingresses via the Blackbox Exporter.
#
# The relabeling allows the actual ingress scrape endpoint to be configured
# via the following annotations:
#
# * `prometheus.io/probe`: Only probe ingresses that have a value of `true`
prometheus::scrape_config { 'kubernetes-ingresses':
order => 220,
config => {
'kubernetes_sd_configs' => [{
'role' => 'ingress'
}],
'metrics_path' => '/probe',
'params' => {
'module' => ['http_2xx'],
},
'relabel_configs' => [
{
'source_labels' => ['__meta_kubernetes_ingress_annotation_prometheus_io_probe'],
'action' => 'keep',
'regex' => true,
},
{
'source_labels' => ['__meta_kubernetes_ingress_scheme','__address__','__meta_kubernetes_ingress_path'],
'target_label' => '__param_target',
'regex' => '(.+);(.+);(.+)',
'replacement' => '${1}://${2}${3}',
},
{
'target_label' => '__address__',
'replacement' => 'blackbox-exporter',
},
{
'source_labels' => ['__param_target'],
'target_label' => 'instance',
},
{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_ingress_label_(.+)',
},
{
'source_labels' => ['__meta_kubernetes_ingress_namespace'],
'target_label' => 'kubernetes_namespace',
},
{
'source_labels' => ['__meta_kubernetes_ingress_name'],
'target_label' => 'kubernetes_name',
},
]
},
}
# Example scrape config for pods
#
# The relabeling allows the actual pod scrape endpoint to be configured via the
# following annotations:
#
# * `prometheus.io/scrape`: Only scrape pods that have a value of `true`
# * `prometheus.io/path`: If the metrics path is not `/metrics` override this.
# * `prometheus.io/port`: Scrape the pod on the indicated port instead of the
# pod's declared ports (default is a port-free target if none are declared).
prometheus::scrape_config { 'kubernetes-pods':
order => 230,
config => {
'kubernetes_sd_configs' => [{
'role' => 'pod'
}],
'relabel_configs' => [
{
'source_labels' => ['__meta_kubernetes_pod_annotation_prometheus_io_scrape'],
'action' => 'keep',
'regex' => true,
},
{
'source_labels' => ['__meta_kubernetes_pod_annotation_prometheus_io_path'],
'action' => 'replace',
'target_label' => '__metrics_path__',
'regex' => '(.+)',
},
{
'source_labels' => ['__address__', '__meta_kubernetes_pod_annotation_prometheus_io_port'],
'action' => 'replace',
'regex' => '([^:]+)(?::\d+)?;(\d+)',
'replacement' => '${1}:${2}',
'target_label' => '__address__',
},
{
'action' => 'labelmap',
'regex' => '__meta_kubernetes_pod_label_(.+)',
},
{
'source_labels' => ['__meta_kubernetes_namespace'],
'action' => 'replace',
'target_label' => 'kubernetes_namespace',
},
{
'source_labels' => ['__meta_kubernetes_pod_name'],
'action' => 'replace',
'target_label' => 'kubernetes_pod_name',
}
]
}
}
}
kubernetes::apply{'prometheus-rules':
type => 'concat',
}
kubernetes::apply_fragment { 'prometheus-rules-header':
content => template('prometheus/prometheus-rules-header.yaml.erb'),
order => 0,
target => 'prometheus-rules',
}
prometheus::rule { 'ScrapeEndpointDown':
expr => '(up == 0 AND up {job != "kubernetes-apiservers"})',
for => '2m',
summary => '{{$labels.instance}}: Scrape target is down',
description => '{{$labels.instance}}: Target down for job {{$labels.job}}',
}
prometheus::rule { 'ContainerScrapeError':
expr => '(container_scrape_error) != 0',
for => '2m',
summary => '{{$labels.instance}}: Container scrape error',
description => '{{$labels.instance}}: Failed to scrape container, metrics will not be updated',
}
}
|