2016-04-25 14:56:27 +00:00
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// Copyright 2015 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 consul
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import (
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2017-10-25 04:21:42 +00:00
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"context"
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2016-04-25 14:56:27 +00:00
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"fmt"
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2016-09-05 12:40:28 +00:00
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"net"
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2017-03-07 14:47:40 +00:00
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"net/http"
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2016-04-25 14:56:27 +00:00
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"strconv"
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"strings"
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"time"
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2017-08-11 18:45:52 +00:00
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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2016-04-25 14:56:27 +00:00
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consul "github.com/hashicorp/consul/api"
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2019-03-25 23:01:12 +00:00
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conntrack "github.com/mwitkow/go-conntrack"
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"github.com/pkg/errors"
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2016-10-21 07:59:43 +00:00
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"github.com/prometheus/client_golang/prometheus"
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2018-01-11 15:10:25 +00:00
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config_util "github.com/prometheus/common/config"
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2016-04-25 14:56:27 +00:00
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"github.com/prometheus/common/model"
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2019-03-25 23:01:12 +00:00
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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"github.com/prometheus/prometheus/discovery/targetgroup"
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2017-07-18 20:46:16 +00:00
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"github.com/prometheus/prometheus/util/strutil"
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2016-04-25 14:56:27 +00:00
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)
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const (
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watchTimeout = 30 * time.Second
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retryInterval = 15 * time.Second
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// addressLabel is the name for the label containing a target's address.
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addressLabel = model.MetaLabelPrefix + "consul_address"
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// nodeLabel is the name for the label containing a target's node name.
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nodeLabel = model.MetaLabelPrefix + "consul_node"
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2017-07-18 20:46:16 +00:00
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// metaDataLabel is the prefix for the labels mapping to a target's metadata.
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metaDataLabel = model.MetaLabelPrefix + "consul_metadata_"
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2018-07-18 04:06:56 +00:00
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// serviceMetaDataLabel is the prefix for the labels mapping to a target's service metadata.
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serviceMetaDataLabel = model.MetaLabelPrefix + "consul_service_metadata_"
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2016-04-25 14:56:27 +00:00
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// tagsLabel is the name of the label containing the tags assigned to the target.
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tagsLabel = model.MetaLabelPrefix + "consul_tags"
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// serviceLabel is the name of the label containing the service name.
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serviceLabel = model.MetaLabelPrefix + "consul_service"
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// serviceAddressLabel is the name of the label containing the (optional) service address.
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serviceAddressLabel = model.MetaLabelPrefix + "consul_service_address"
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//servicePortLabel is the name of the label containing the service port.
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servicePortLabel = model.MetaLabelPrefix + "consul_service_port"
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// datacenterLabel is the name of the label containing the datacenter ID.
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datacenterLabel = model.MetaLabelPrefix + "consul_dc"
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2018-12-18 10:51:05 +00:00
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// taggedAddressesLabel is the prefix for the labels mapping to a target's tagged addresses.
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taggedAddressesLabel = model.MetaLabelPrefix + "consul_tagged_address_"
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2016-04-25 14:56:27 +00:00
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// serviceIDLabel is the name of the label containing the service ID.
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serviceIDLabel = model.MetaLabelPrefix + "consul_service_id"
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2016-10-21 07:59:43 +00:00
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// Constants for instrumentation.
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namespace = "prometheus"
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)
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var (
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rpcFailuresCount = prometheus.NewCounter(
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prometheus.CounterOpts{
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Namespace: namespace,
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Name: "sd_consul_rpc_failures_total",
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Help: "The number of Consul RPC call failures.",
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})
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rpcDuration = prometheus.NewSummaryVec(
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prometheus.SummaryOpts{
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Namespace: namespace,
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Name: "sd_consul_rpc_duration_seconds",
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Help: "The duration of a Consul RPC call in seconds.",
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},
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[]string{"endpoint", "call"},
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)
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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// DefaultSDConfig is the default Consul SD configuration.
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DefaultSDConfig = SDConfig{
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2018-03-23 14:48:43 +00:00
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TagSeparator: ",",
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Scheme: "http",
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Server: "localhost:8500",
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AllowStale: true,
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RefreshInterval: model.Duration(watchTimeout),
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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}
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2016-04-25 14:56:27 +00:00
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)
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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// SDConfig is the configuration for Consul service discovery.
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type SDConfig struct {
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2018-01-24 12:14:32 +00:00
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Server string `yaml:"server,omitempty"`
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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Token config_util.Secret `yaml:"token,omitempty"`
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Datacenter string `yaml:"datacenter,omitempty"`
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TagSeparator string `yaml:"tag_separator,omitempty"`
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Scheme string `yaml:"scheme,omitempty"`
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Username string `yaml:"username,omitempty"`
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Password config_util.Secret `yaml:"password,omitempty"`
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2018-03-23 14:48:43 +00:00
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// See https://www.consul.io/docs/internals/consensus.html#consistency-modes,
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// stale reads are a lot cheaper and are a necessity if you have >5k targets.
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AllowStale bool `yaml:"allow_stale"`
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// By default use blocking queries (https://www.consul.io/api/index.html#blocking-queries)
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// but allow users to throttle updates if necessary. This can be useful because of "bugs" like
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// https://github.com/hashicorp/consul/issues/3712 which cause an un-necessary
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// amount of requests on consul.
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RefreshInterval model.Duration `yaml:"refresh_interval,omitempty"`
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// See https://www.consul.io/api/catalog.html#list-services
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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// The list of services for which targets are discovered.
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// Defaults to all services if empty.
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2018-07-03 11:43:41 +00:00
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Services []string `yaml:"services,omitempty"`
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2019-03-12 10:31:27 +00:00
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// A list of tags used to filter instances inside a service. Services must contain all tags in the list.
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ServiceTags []string `yaml:"tags,omitempty"`
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2018-03-23 14:48:43 +00:00
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// Desired node metadata.
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NodeMeta map[string]string `yaml:"node_meta,omitempty"`
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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TLSConfig config_util.TLSConfig `yaml:"tls_config,omitempty"`
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}
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// UnmarshalYAML implements the yaml.Unmarshaler interface.
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func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
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*c = DefaultSDConfig
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type plain SDConfig
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err := unmarshal((*plain)(c))
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if err != nil {
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return err
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}
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if strings.TrimSpace(c.Server) == "" {
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2019-03-25 23:01:12 +00:00
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return errors.New("consul SD configuration requires a server address")
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Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
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}
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return nil
|
|
|
|
}
|
|
|
|
|
2016-10-21 07:59:43 +00:00
|
|
|
func init() {
|
|
|
|
prometheus.MustRegister(rpcFailuresCount)
|
|
|
|
prometheus.MustRegister(rpcDuration)
|
|
|
|
|
|
|
|
// Initialize metric vectors.
|
|
|
|
rpcDuration.WithLabelValues("catalog", "service")
|
|
|
|
rpcDuration.WithLabelValues("catalog", "services")
|
|
|
|
}
|
|
|
|
|
2016-04-25 14:56:27 +00:00
|
|
|
// Discovery retrieves target information from a Consul server
|
|
|
|
// and updates them via watches.
|
|
|
|
type Discovery struct {
|
|
|
|
client *consul.Client
|
|
|
|
clientDatacenter string
|
|
|
|
tagSeparator string
|
2016-04-25 16:47:21 +00:00
|
|
|
watchedServices []string // Set of services which will be discovered.
|
2019-03-12 10:31:27 +00:00
|
|
|
watchedTags []string // Tags used to filter instances of a service.
|
2018-03-23 14:48:43 +00:00
|
|
|
watchedNodeMeta map[string]string
|
|
|
|
allowStale bool
|
|
|
|
refreshInterval time.Duration
|
2018-08-01 09:11:41 +00:00
|
|
|
finalizer func()
|
2017-04-28 15:12:38 +00:00
|
|
|
logger log.Logger
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// NewDiscovery returns a new Discovery for the given config.
|
Refactor SD configuration to remove `config` dependency (#3629)
* refactor: move targetGroup struct and CheckOverflow() to their own package
* refactor: move auth and security related structs to a utility package, fix import error in utility package
* refactor: Azure SD, remove SD struct from config
* refactor: DNS SD, remove SD struct from config into dns package
* refactor: ec2 SD, move SD struct from config into the ec2 package
* refactor: file SD, move SD struct from config to file discovery package
* refactor: gce, move SD struct from config to gce discovery package
* refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil
* refactor: consul, move SD struct from config into consul discovery package
* refactor: marathon, move SD struct from config into marathon discovery package
* refactor: triton, move SD struct from config to triton discovery package, fix test
* refactor: zookeeper, move SD structs from config to zookeeper discovery package
* refactor: openstack, remove SD struct from config, move into openstack discovery package
* refactor: kubernetes, move SD struct from config into kubernetes discovery package
* refactor: notifier, use targetgroup package instead of config
* refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup
* refactor: retrieval, use targetgroup package instead of config.TargetGroup
* refactor: storage, use config util package
* refactor: discovery manager, use targetgroup package instead of config.TargetGroup
* refactor: use HTTPClient and TLS config from configUtil instead of config
* refactor: tests, use targetgroup package instead of config.TargetGroup
* refactor: fix tagetgroup.Group pointers that were removed by mistake
* refactor: openstack, kubernetes: drop prefixes
* refactor: remove import aliases forced due to vscode bug
* refactor: move main SD struct out of config into discovery/config
* refactor: rename configUtil to config_util
* refactor: rename yamlUtil to yaml_config
* refactor: kubernetes, remove prefixes
* refactor: move the TargetGroup package to discovery/
* refactor: fix order of imports
2017-12-29 20:01:34 +00:00
|
|
|
func NewDiscovery(conf *SDConfig, logger log.Logger) (*Discovery, error) {
|
2017-08-11 18:45:52 +00:00
|
|
|
if logger == nil {
|
|
|
|
logger = log.NewNopLogger()
|
|
|
|
}
|
|
|
|
|
2018-04-25 17:19:06 +00:00
|
|
|
tls, err := config_util.NewTLSConfig(&conf.TLSConfig)
|
2017-03-07 14:47:40 +00:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
2017-10-06 10:22:19 +00:00
|
|
|
transport := &http.Transport{
|
2018-08-01 09:11:41 +00:00
|
|
|
IdleConnTimeout: 5 * time.Duration(conf.RefreshInterval),
|
2017-10-06 10:22:19 +00:00
|
|
|
TLSClientConfig: tls,
|
|
|
|
DialContext: conntrack.NewDialContextFunc(
|
|
|
|
conntrack.DialWithTracing(),
|
|
|
|
conntrack.DialWithName("consul_sd"),
|
|
|
|
),
|
|
|
|
}
|
2017-10-20 15:56:30 +00:00
|
|
|
wrapper := &http.Client{
|
|
|
|
Transport: transport,
|
2017-10-28 23:42:42 +00:00
|
|
|
Timeout: 35 * time.Second,
|
2017-10-20 15:56:30 +00:00
|
|
|
}
|
2017-03-07 14:47:40 +00:00
|
|
|
|
2016-04-25 14:56:27 +00:00
|
|
|
clientConf := &consul.Config{
|
|
|
|
Address: conf.Server,
|
|
|
|
Scheme: conf.Scheme,
|
|
|
|
Datacenter: conf.Datacenter,
|
2017-06-01 21:14:23 +00:00
|
|
|
Token: string(conf.Token),
|
2016-04-25 14:56:27 +00:00
|
|
|
HttpAuth: &consul.HttpBasicAuth{
|
|
|
|
Username: conf.Username,
|
2017-05-29 11:46:23 +00:00
|
|
|
Password: string(conf.Password),
|
2016-04-25 14:56:27 +00:00
|
|
|
},
|
2017-03-07 14:47:40 +00:00
|
|
|
HttpClient: wrapper,
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
|
|
|
client, err := consul.NewClient(clientConf)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
cd := &Discovery{
|
2016-09-26 19:20:56 +00:00
|
|
|
client: client,
|
|
|
|
tagSeparator: conf.TagSeparator,
|
|
|
|
watchedServices: conf.Services,
|
2019-03-12 10:31:27 +00:00
|
|
|
watchedTags: conf.ServiceTags,
|
2018-03-23 14:48:43 +00:00
|
|
|
watchedNodeMeta: conf.NodeMeta,
|
|
|
|
allowStale: conf.AllowStale,
|
|
|
|
refreshInterval: time.Duration(conf.RefreshInterval),
|
2018-08-01 09:11:41 +00:00
|
|
|
clientDatacenter: conf.Datacenter,
|
|
|
|
finalizer: transport.CloseIdleConnections,
|
2017-04-28 15:12:38 +00:00
|
|
|
logger: logger,
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
|
|
|
return cd, nil
|
|
|
|
}
|
|
|
|
|
2016-04-25 16:47:21 +00:00
|
|
|
// shouldWatch returns whether the service of the given name should be watched.
|
2018-03-23 14:48:43 +00:00
|
|
|
func (d *Discovery) shouldWatch(name string, tags []string) bool {
|
|
|
|
return d.shouldWatchFromName(name) && d.shouldWatchFromTags(tags)
|
|
|
|
}
|
|
|
|
|
|
|
|
// shouldWatch returns whether the service of the given name should be watched based on its name.
|
|
|
|
func (d *Discovery) shouldWatchFromName(name string) bool {
|
2016-04-25 16:47:21 +00:00
|
|
|
// If there's no fixed set of watched services, we watch everything.
|
2017-03-16 23:29:47 +00:00
|
|
|
if len(d.watchedServices) == 0 {
|
2016-04-25 16:47:21 +00:00
|
|
|
return true
|
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
|
2017-03-16 23:29:47 +00:00
|
|
|
for _, sn := range d.watchedServices {
|
2016-04-25 16:47:21 +00:00
|
|
|
if sn == name {
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// shouldWatch returns whether the service of the given name should be watched based on its tags.
|
|
|
|
// This gets called when the user doesn't specify a list of services in order to avoid watching
|
|
|
|
// *all* services. Details in https://github.com/prometheus/prometheus/pull/3814
|
|
|
|
func (d *Discovery) shouldWatchFromTags(tags []string) bool {
|
|
|
|
// If there's no fixed set of watched tags, we watch everything.
|
2019-03-12 10:31:27 +00:00
|
|
|
if len(d.watchedTags) == 0 {
|
2018-03-23 14:48:43 +00:00
|
|
|
return true
|
|
|
|
}
|
2016-04-25 14:56:27 +00:00
|
|
|
|
2019-03-12 10:31:27 +00:00
|
|
|
tagOuter:
|
|
|
|
for _, wtag := range d.watchedTags {
|
|
|
|
for _, tag := range tags {
|
|
|
|
if wtag == tag {
|
|
|
|
continue tagOuter
|
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
2019-03-12 10:31:27 +00:00
|
|
|
return false
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
2019-03-12 10:31:27 +00:00
|
|
|
return true
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Get the local datacenter if not specified.
|
|
|
|
func (d *Discovery) getDatacenter() error {
|
|
|
|
// If the datacenter was not set from clientConf, let's get it from the local Consul agent
|
|
|
|
// (Consul default is to use local node's datacenter if one isn't given for a query).
|
|
|
|
if d.clientDatacenter != "" {
|
|
|
|
return nil
|
|
|
|
}
|
2016-04-25 16:40:39 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
info, err := d.client.Agent().Self()
|
|
|
|
if err != nil {
|
|
|
|
level.Error(d.logger).Log("msg", "Error retrieving datacenter name", "err", err)
|
|
|
|
rpcFailuresCount.Inc()
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
dc, ok := info["Config"]["Datacenter"].(string)
|
|
|
|
if !ok {
|
2019-03-25 23:01:12 +00:00
|
|
|
err := errors.Errorf("invalid value '%v' for Config.Datacenter", info["Config"]["Datacenter"])
|
2018-03-23 14:48:43 +00:00
|
|
|
level.Error(d.logger).Log("msg", "Error retrieving datacenter name", "err", err)
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
d.clientDatacenter = dc
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// Initialize the Discoverer run.
|
|
|
|
func (d *Discovery) initialize(ctx context.Context) {
|
|
|
|
// Loop until we manage to get the local datacenter.
|
|
|
|
for {
|
2016-04-25 16:40:39 +00:00
|
|
|
// We have to check the context at least once. The checks during channel sends
|
|
|
|
// do not guarantee that.
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
|
|
|
return
|
|
|
|
default:
|
|
|
|
}
|
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// Get the local datacenter first, if necessary.
|
|
|
|
err := d.getDatacenter()
|
2016-04-25 14:56:27 +00:00
|
|
|
if err != nil {
|
|
|
|
time.Sleep(retryInterval)
|
|
|
|
continue
|
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
// We are good to go.
|
|
|
|
return
|
|
|
|
}
|
|
|
|
}
|
2016-04-25 16:40:39 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// Run implements the Discoverer interface.
|
|
|
|
func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
|
2018-08-01 09:11:41 +00:00
|
|
|
if d.finalizer != nil {
|
|
|
|
defer d.finalizer()
|
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
d.initialize(ctx)
|
|
|
|
|
2019-03-12 10:31:27 +00:00
|
|
|
if len(d.watchedServices) == 0 || len(d.watchedTags) != 0 {
|
2018-03-23 14:48:43 +00:00
|
|
|
// We need to watch the catalog.
|
|
|
|
ticker := time.NewTicker(d.refreshInterval)
|
|
|
|
|
2018-04-05 09:41:09 +00:00
|
|
|
// Watched services and their cancellation functions.
|
|
|
|
services := make(map[string]func())
|
|
|
|
var lastIndex uint64
|
|
|
|
|
|
|
|
for {
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
|
|
|
ticker.Stop()
|
|
|
|
return
|
|
|
|
default:
|
2018-03-23 14:48:43 +00:00
|
|
|
d.watchServices(ctx, ch, &lastIndex, services)
|
2018-04-05 09:41:09 +00:00
|
|
|
<-ticker.C
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
2018-04-05 09:41:09 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
} else {
|
|
|
|
// We only have fully defined services.
|
|
|
|
for _, name := range d.watchedServices {
|
|
|
|
d.watchService(ctx, ch, name)
|
|
|
|
}
|
|
|
|
<-ctx.Done()
|
|
|
|
}
|
|
|
|
}
|
2016-04-25 16:40:39 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// Watch the catalog for new services we would like to watch. This is called only
|
|
|
|
// when we don't know yet the names of the services and need to ask Consul the
|
|
|
|
// entire list of services.
|
2019-05-03 13:11:28 +00:00
|
|
|
func (d *Discovery) watchServices(ctx context.Context, ch chan<- []*targetgroup.Group, lastIndex *uint64, services map[string]func()) {
|
2018-03-23 14:48:43 +00:00
|
|
|
catalog := d.client.Catalog()
|
2019-03-12 10:31:27 +00:00
|
|
|
level.Debug(d.logger).Log("msg", "Watching services", "tags", d.watchedTags)
|
2018-03-23 14:48:43 +00:00
|
|
|
|
|
|
|
t0 := time.Now()
|
2019-02-15 14:47:05 +00:00
|
|
|
opts := &consul.QueryOptions{
|
2018-03-23 14:48:43 +00:00
|
|
|
WaitIndex: *lastIndex,
|
|
|
|
WaitTime: watchTimeout,
|
|
|
|
AllowStale: d.allowStale,
|
|
|
|
NodeMeta: d.watchedNodeMeta,
|
2019-02-15 14:47:05 +00:00
|
|
|
}
|
|
|
|
srvs, meta, err := catalog.Services(opts.WithContext(ctx))
|
2018-03-23 14:48:43 +00:00
|
|
|
elapsed := time.Since(t0)
|
|
|
|
rpcDuration.WithLabelValues("catalog", "services").Observe(elapsed.Seconds())
|
2016-04-25 16:40:39 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
if err != nil {
|
|
|
|
level.Error(d.logger).Log("msg", "Error refreshing service list", "err", err)
|
|
|
|
rpcFailuresCount.Inc()
|
|
|
|
time.Sleep(retryInterval)
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
|
|
|
// If the index equals the previous one, the watch timed out with no update.
|
|
|
|
if meta.LastIndex == *lastIndex {
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
|
|
|
*lastIndex = meta.LastIndex
|
|
|
|
|
|
|
|
// Check for new services.
|
|
|
|
for name := range srvs {
|
|
|
|
// catalog.Service() returns a map of service name to tags, we can use that to watch
|
|
|
|
// only the services that have the tag we are looking for (if specified).
|
|
|
|
// In the future consul will also support server side for service metadata.
|
|
|
|
// https://github.com/hashicorp/consul/issues/1107
|
|
|
|
if !d.shouldWatch(name, srvs[name]) {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
if _, ok := services[name]; ok {
|
|
|
|
continue // We are already watching the service.
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
2016-04-25 16:40:39 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
wctx, cancel := context.WithCancel(ctx)
|
|
|
|
d.watchService(wctx, ch, name)
|
|
|
|
services[name] = cancel
|
|
|
|
}
|
|
|
|
|
|
|
|
// Check for removed services.
|
|
|
|
for name, cancel := range services {
|
|
|
|
if _, ok := srvs[name]; !ok {
|
|
|
|
// Call the watch cancellation function.
|
|
|
|
cancel()
|
|
|
|
delete(services, name)
|
|
|
|
|
|
|
|
// Send clearing target group.
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
case ch <- []*targetgroup.Group{{Source: name}}:
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-04-25 16:40:39 +00:00
|
|
|
// consulService contains data belonging to the same service.
|
|
|
|
type consulService struct {
|
|
|
|
name string
|
2019-03-12 10:31:27 +00:00
|
|
|
tags []string
|
2016-04-25 16:40:39 +00:00
|
|
|
labels model.LabelSet
|
2018-03-23 14:48:43 +00:00
|
|
|
discovery *Discovery
|
2016-04-25 16:40:39 +00:00
|
|
|
client *consul.Client
|
|
|
|
tagSeparator string
|
2017-04-28 15:12:38 +00:00
|
|
|
logger log.Logger
|
2016-04-25 16:40:39 +00:00
|
|
|
}
|
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// Start watching a service.
|
|
|
|
func (d *Discovery) watchService(ctx context.Context, ch chan<- []*targetgroup.Group, name string) {
|
|
|
|
srv := &consulService{
|
|
|
|
discovery: d,
|
|
|
|
client: d.client,
|
|
|
|
name: name,
|
2019-03-12 10:31:27 +00:00
|
|
|
tags: d.watchedTags,
|
2018-03-23 14:48:43 +00:00
|
|
|
labels: model.LabelSet{
|
|
|
|
serviceLabel: model.LabelValue(name),
|
|
|
|
datacenterLabel: model.LabelValue(d.clientDatacenter),
|
|
|
|
},
|
|
|
|
tagSeparator: d.tagSeparator,
|
|
|
|
logger: d.logger,
|
|
|
|
}
|
2016-04-25 14:56:27 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
go func() {
|
|
|
|
ticker := time.NewTicker(d.refreshInterval)
|
|
|
|
var lastIndex uint64
|
|
|
|
catalog := srv.client.Catalog()
|
2018-04-05 09:41:09 +00:00
|
|
|
for {
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
|
|
|
ticker.Stop()
|
|
|
|
return
|
|
|
|
default:
|
|
|
|
srv.watch(ctx, ch, catalog, &lastIndex)
|
2019-05-03 13:11:28 +00:00
|
|
|
select {
|
|
|
|
case <-ticker.C:
|
|
|
|
case <-ctx.Done():
|
|
|
|
}
|
2018-04-05 09:41:09 +00:00
|
|
|
}
|
2016-04-25 16:40:39 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
}()
|
|
|
|
}
|
2016-04-25 14:56:27 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// Get updates for a service.
|
2019-05-03 13:11:28 +00:00
|
|
|
func (srv *consulService) watch(ctx context.Context, ch chan<- []*targetgroup.Group, catalog *consul.Catalog, lastIndex *uint64) {
|
2019-03-12 10:31:27 +00:00
|
|
|
level.Debug(srv.logger).Log("msg", "Watching service", "service", srv.name, "tags", srv.tags)
|
2018-03-23 14:48:43 +00:00
|
|
|
|
|
|
|
t0 := time.Now()
|
2019-02-15 14:47:05 +00:00
|
|
|
opts := &consul.QueryOptions{
|
2018-03-23 14:48:43 +00:00
|
|
|
WaitIndex: *lastIndex,
|
|
|
|
WaitTime: watchTimeout,
|
|
|
|
AllowStale: srv.discovery.allowStale,
|
|
|
|
NodeMeta: srv.discovery.watchedNodeMeta,
|
2019-02-15 14:47:05 +00:00
|
|
|
}
|
2019-03-12 10:31:27 +00:00
|
|
|
nodes, meta, err := catalog.ServiceMultipleTags(srv.name, srv.tags, opts.WithContext(ctx))
|
2018-03-23 14:48:43 +00:00
|
|
|
elapsed := time.Since(t0)
|
|
|
|
rpcDuration.WithLabelValues("catalog", "service").Observe(elapsed.Seconds())
|
|
|
|
|
|
|
|
// Check the context before in order to exit early.
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
default:
|
|
|
|
// Continue.
|
|
|
|
}
|
2016-06-10 18:40:06 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
if err != nil {
|
2019-03-12 10:31:27 +00:00
|
|
|
level.Error(srv.logger).Log("msg", "Error refreshing service", "service", srv.name, "tags", srv.tags, "err", err)
|
2018-03-23 14:48:43 +00:00
|
|
|
rpcFailuresCount.Inc()
|
|
|
|
time.Sleep(retryInterval)
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
|
|
|
// If the index equals the previous one, the watch timed out with no update.
|
|
|
|
if meta.LastIndex == *lastIndex {
|
2019-05-03 13:11:28 +00:00
|
|
|
return
|
2018-03-23 14:48:43 +00:00
|
|
|
}
|
|
|
|
*lastIndex = meta.LastIndex
|
2016-06-10 18:40:06 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
tgroup := targetgroup.Group{
|
|
|
|
Source: srv.name,
|
|
|
|
Labels: srv.labels,
|
|
|
|
Targets: make([]model.LabelSet, 0, len(nodes)),
|
|
|
|
}
|
2016-06-10 18:40:06 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
for _, node := range nodes {
|
2017-07-18 20:46:16 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// We surround the separated list with the separator as well. This way regular expressions
|
|
|
|
// in relabeling rules don't have to consider tag positions.
|
|
|
|
var tags = srv.tagSeparator + strings.Join(node.ServiceTags, srv.tagSeparator) + srv.tagSeparator
|
2017-07-18 20:46:16 +00:00
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
// If the service address is not empty it should be used instead of the node address
|
2018-12-18 10:51:05 +00:00
|
|
|
// since the service may be registered remotely through a different node.
|
2018-03-23 14:48:43 +00:00
|
|
|
var addr string
|
|
|
|
if node.ServiceAddress != "" {
|
|
|
|
addr = net.JoinHostPort(node.ServiceAddress, fmt.Sprintf("%d", node.ServicePort))
|
|
|
|
} else {
|
|
|
|
addr = net.JoinHostPort(node.Address, fmt.Sprintf("%d", node.ServicePort))
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
|
|
|
|
labels := model.LabelSet{
|
|
|
|
model.AddressLabel: model.LabelValue(addr),
|
|
|
|
addressLabel: model.LabelValue(node.Address),
|
|
|
|
nodeLabel: model.LabelValue(node.Node),
|
|
|
|
tagsLabel: model.LabelValue(tags),
|
|
|
|
serviceAddressLabel: model.LabelValue(node.ServiceAddress),
|
|
|
|
servicePortLabel: model.LabelValue(strconv.Itoa(node.ServicePort)),
|
|
|
|
serviceIDLabel: model.LabelValue(node.ServiceID),
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
|
2018-12-18 10:51:05 +00:00
|
|
|
// Add all key/value pairs from the node's metadata as their own labels.
|
2018-03-23 14:48:43 +00:00
|
|
|
for k, v := range node.NodeMeta {
|
|
|
|
name := strutil.SanitizeLabelName(k)
|
|
|
|
labels[metaDataLabel+model.LabelName(name)] = model.LabelValue(v)
|
2016-04-25 16:40:39 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
|
2018-12-18 10:51:05 +00:00
|
|
|
// Add all key/value pairs from the service's metadata as their own labels.
|
2018-07-18 04:06:56 +00:00
|
|
|
for k, v := range node.ServiceMeta {
|
|
|
|
name := strutil.SanitizeLabelName(k)
|
|
|
|
labels[serviceMetaDataLabel+model.LabelName(name)] = model.LabelValue(v)
|
|
|
|
}
|
|
|
|
|
2018-12-18 10:51:05 +00:00
|
|
|
// Add all key/value pairs from the service's tagged addresses as their own labels.
|
|
|
|
for k, v := range node.TaggedAddresses {
|
|
|
|
name := strutil.SanitizeLabelName(k)
|
|
|
|
labels[taggedAddressesLabel+model.LabelName(name)] = model.LabelValue(v)
|
|
|
|
}
|
|
|
|
|
2018-03-23 14:48:43 +00:00
|
|
|
tgroup.Targets = append(tgroup.Targets, labels)
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|
2018-03-23 14:48:43 +00:00
|
|
|
|
|
|
|
select {
|
|
|
|
case <-ctx.Done():
|
|
|
|
case ch <- []*targetgroup.Group{&tgroup}:
|
|
|
|
}
|
2016-04-25 14:56:27 +00:00
|
|
|
}
|