haproxytechblog · March 3, 2022 21:59
diff --git a/blog20190412-01.sh b/blog20190412-01.sh
 sudo apt update
 sudo apt install -y git ca-certificates gcc libc6-dev liblua5.3-dev libpcre3-dev libssl-dev libsystemd-dev make wget zlib1g-dev
 git clone https://github.com/haproxy/haproxy.git
 cd haproxy
 make TARGET=linux-glibc USE_LUA=1 USE_OPENSSL=1 USE_PCRE=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_PROMEX=1
 sudo make install-bin
diff --git a/blog20190412-02.sh b/blog20190412-02.sh
 sudo systemctl stop haproxy
 sudo cp /usr/local/sbin/haproxy /usr/sbin/haproxy
 sudo systemctl start haproxy
diff --git a/blog20190412-03.sh b/blog20190412-03.sh
 haproxy -vv

 Built with the Prometheus exporter as a service
diff --git a/blog20190412-04.cfg b/blog20190412-04.cfg
 frontend stats
   bind *:8404
   option http-use-htx
   http-request use-service prometheus-exporter if { path /metrics }
   stats enable
   stats uri /stats
   stats refresh 10s
diff --git a/blog20190412-05.yml b/blog20190412-05.yml
 - job_name: 'haproxy'
  static_configs:
  - targets: ['localhost:8404']
diff --git a/blog20190412-06.sh b/blog20190412-06.sh
 haproxy_frontend_http_requests_rate_current
diff --git a/blog20190412-07.sh b/blog20190412-07.sh
 sum(haproxy_frontend_http_requests_rate_current{proxy="fe_main",job="haproxy"})
diff --git a/blog20190412-08.yml b/blog20190412-08.yml
 rule_files:
  - 'alerts.yml'
diff --git a/blog20190412-09.yml b/blog20190412-09.yml
 alerting:
  alertmanagers:
  - static_configs:
    - targets:
      - localhost:9093
diff --git a/blog20190412-10.yml b/blog20190412-10.yml
 groups:
 - name: be_servers_alert
  rules:
  - alert: be_servers_no_backends
    expr: haproxy_backend_active_servers{proxy="be_servers"} < 1
    for: 15s
    labels:
      severity: page      
    annotations:
      summary: HAProxy reports all servers are unhealthy for be_app.
diff --git a/blog20190412-11.yml b/blog20190412-11.yml
 global:
  resolve_timeout: 5m
  smtp_from: 'alertmanager@example.com'
  smtp_smarthost: example.com:587
  smtp_auth_username: 'username'
  smtp_auth_password: 'password'

 route:
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'email'
diff --git a/blog20190412-12.yml b/blog20190412-12.yml
 - alert: fe_main_rate_double
  expr: haproxy_frontend_http_requests_rate_current{proxy="fe_main"} > avg_over_time(haproxy_frontend_http_requests_rate_current{proxy="fe_main"}[24h])*2
  for: 15s
  labels:
    severity: page
  annotations:
    summary: HAProxy frontend request rate doubled for fe_main
	sudo apt update
	sudo apt install -y git ca-certificates gcc libc6-dev liblua5.3-dev libpcre3-dev libssl-dev libsystemd-dev make wget zlib1g-dev
	git clone https://github.com/haproxy/haproxy.git
	cd haproxy
	make TARGET=linux-glibc USE_LUA=1 USE_OPENSSL=1 USE_PCRE=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_PROMEX=1
	sudo make install-bin
	sudo systemctl stop haproxy
	sudo cp /usr/local/sbin/haproxy /usr/sbin/haproxy
	sudo systemctl start haproxy
	frontend stats
	bind *:8404
	option http-use-htx
	http-request use-service prometheus-exporter if { path /metrics }
	stats enable
	stats uri /stats
	stats refresh 10s
	- job_name: 'haproxy'
	static_configs:
	- targets: ['localhost:8404']
	alerting:
	alertmanagers:
	- static_configs:
	- targets:
	- localhost:9093
	groups:
	- name: be_servers_alert
	rules:
	- alert: be_servers_no_backends
	expr: haproxy_backend_active_servers{proxy="be_servers"} < 1
	for: 15s
	labels:
	severity: page
	annotations:
	summary: HAProxy reports all servers are unhealthy for be_app.
	global:
	resolve_timeout: 5m
	smtp_from: 'alertmanager@example.com'
	smtp_smarthost: example.com:587
	smtp_auth_username: 'username'
	smtp_auth_password: 'password'

	route:
	group_by: ['alertname']
	group_wait: 10s
	group_interval: 10s
	repeat_interval: 1h
	receiver: 'email'
	- alert: fe_main_rate_double
	expr: haproxy_frontend_http_requests_rate_current{proxy="fe_main"} > avg_over_time(haproxy_frontend_http_requests_rate_current{proxy="fe_main"}[24h])*2
	for: 15s
	labels:
	severity: page
	annotations:
	summary: HAProxy frontend request rate doubled for fe_main