使用haproxy 2.0 prometheus metrics 监控系统状态

haproxy 2.0 已经发布一段时间了，提供内部直接暴露的prometheus metrics 很方便，可以快速的监控系统的状态
以下是一个简单的demo

环境准备

docker-compose 文件

 
version: "3"

services:

    grafana:

     image: grafana/grafana

     ports:

     - "3000:3000"

    prometheus:

     image: prom/prometheus

     volumes:

     - "./prometheus.yml:/etc/prometheus/prometheus.yml"

     ports:

     - "9090:9090"

    haproxy:

     image: haproxy:2.0.5

     volumes:

     - "./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg"

     ports:

     - "80:80"

     - "8404:8404"

     - "8080:8080"

     - "9000:9000"

     - "9001:9001"

     - "9002:9002"

     - "1000-1005:1000-1005"

     - "10080:10080"

    nginx1:

     image: nginx

     ports:

     - "8090:80"

    nginx2:

     image: nginx

     ports:

     - "8091:80"

haproxy 配置

配置使用的官方的简单修改了下，可以

#

# This is the ultimate HAProxy 2.0 "Getting Started" config

# It demonstrates many of the features available which are now available 

# While you may not need all of these things, this can serve

# as a reference for your own configurations.

#

# Have questions? Check out our community Slack:

# https://slack.haproxy.org/

#

​

global

    # master-worker required for `program` section

    # enable here or start with -Ws

    master-worker

    mworker-max-reloads 3

    # enable core dumps

    set-dumpable

    user root

    group root

    log stdout local0

​

defaults

    mode http

    log global

    timeout client 5s

    timeout server 5s

    timeout connect 5s

    option redispatch

    option httplog

​

resolvers dns

    parse-resolv-conf

    resolve_retries 3

    timeout resolve 1s

    timeout retry 1s

    hold other 30s

    hold refused 30s

    hold nx 30s

    hold timeout 30s

    hold valid 10s

    hold obsolete 30s

​

userlist api 

  user admin password $5$aVnIFECJ$2QYP64eTTXZ1grSjwwdoQxK/AP8kcOflEO1Q5fc.5aA

​

frontend stats

    bind *:8404

    # Enable Prometheus Exporter

    http-request use-service prometheus-exporter if { path /metrics }

    stats enable

    stats uri /stats

    stats refresh 10s

​

frontend fe_main

    bind *:8080

    # Enable log sampling

    # One out of 10 requests would be logged to this source

    log 127.0.0.1:10001 sample 1:10 local0

    # For every 11 requests, log requests 2, 3, and 8-11

    log 127.0.0.1:10002 sample 2-3,8-11:11 local0

​

    # Log profiling data

    log-format "%ci:%cp [%tr] %ft %b/%s %TR/%Tw/%Tc/%Tr/%Ta %ST %B %CC %CS %tsc %ac/%fc/%bc/%sc/%rc %sq/%bq %hr %hs %{+Q}r cpu_calls:%[cpu_calls] cpu_ns_tot:%[cpu_ns_tot] cpu_ns_avg:%[cpu_ns_avg] lat_ns_tot:%[lat_ns_tot] lat_ns_avg:%[lat_ns_avg]"

​

    # gRPC path matching

    acl is_grpc_codename path /CodenameCreator/KeepGettingCodenames 

    # Dynamic 'do-resolve' trusted hosts

    acl dynamic_hosts req.hdr(Host) api.local admin.local haproxy.com

​

    # Activate Traffic Mirror

    # Redirect if not SSL

    # http-request redirect scheme https unless { ssl_fc }

​

    # Enable src tracking

    # http-request track-sc0 src table mypeers/src_tracking

​

    # Enable rate limiting

    # Return 429 Too Many Requests if client averages more than

    # 10 requests in 10 seconds.

    # (duration defined in stick table in peers section)

    http-request deny deny_status 429 if { sc_http_req_rate(0) gt 10 }

​

    # Enable local resolving of Host if within dynamic_hosts ACL

    # Allows connecting to dynamic IP address specified in Host header

    # Useful for DNS split view or split horizon

    http-request do-resolve(txn.dstip,dns) hdr(Host),lower if dynamic_hosts

    http-request capture var(txn.dstip) len 40 if dynamic_hosts

​

    # return 503 when dynamic_hosts matches but the variable 

    # txn.dstip is not set which mean DNS resolution error

    # otherwise route to be_dynamic

    use_backend be_503 if dynamic_hosts !{ var(txn.dstip) -m found }

    use_backend be_dynamic if dynamic_hosts

​

    # route to gRPC path

    use_backend be_grpc if is_grpc_codename 

​

    default_backend be_main

​

backend be_main

    # Enable Power of Two Random Choices Algorithm

    balance random(2)

    # Enable Layer 7 retries

    retry-on all-retryable-errors

    retries 3 

    # retrying POST requests can be dangerous

    # make sure you understand the implications before removing

    http-request disable-l7-retry if METH_POST

    server server1 nginx1:80 check inter 3s

    server server2 nginx2:80 check inter 3s

backend be_grpc

    default-server ssl verify none alpn h2 check maxconn 50

    server grpc1 10.1.0.11:3000 

    server grpc2 10.1.0.12:3000 

​

backend be_dynamic

    default-server ssl verify none check maxconn 50

​

    # rule to prevent HAProxy from reconnecting to services

    # on the local network (forged DNS name used to scan the network)

    http-request deny if { var(txn.dstip) -m ip 127.0.0.0/8 10.0.0.0/8 }

    http-request set-dst var(txn.dstip)

    server dynamic 0.0.0.0:0

​

backend spoe-traffic-mirror

    mode tcp

    balance roundrobin

    timeout connect 5s

    timeout server 1m

    server spoa1 127.0.0.1:12345

    server spoa2 10.1.0.20:12345

​

backend be_503

    # dummy backend used to return 503.

    # You can use the 'errorfile' directive to send a nice

    # 503 error page to end users.

    errorfile 503 /usr/local/etc/haproxy/errors/503.http

promethesu 配置

scrape_configs:

  - job_name: haproxy

    metrics_path: /metrics

    scrape_interval: 10s

    scrape_timeout: 10s

    static_configs:

      - targets: ['haproxy:8404']