Adding influx relay to make the existing monitoring stack highly available
Added Influxdb relay to make the existing monitoring stack highly
available. Relay replicates the data to multiple database instances.
Also added configutation in HAProxy that load balances the read queries
to influxdb instances and write queries to influxdb relays
┌─────────────────┐
│writes & queries │
└─────────────────┘
│
▼
┌───────────────┐
│ │
┌────────│ Load Balancer │─────────┐
│ │ │ │
│ └──────┬─┬──────┘ │
│ │ │ │
│ │ │ │
│ ┌──────┘ └────────┐ │
│ │ ┌─────────────┐ │ │┌──────┐
│ │ │/write or UDP│ │ ││/query│
│ ▼ └─────────────┘ ▼ │└──────┘
│ ┌──────────┐ ┌──────────┐ │
│ │ InfluxDB │ │ InfluxDB │ │
│ │ Relay │ │ Relay │ │
│ └──┬────┬──┘ └────┬──┬──┘ │
│ │ | | │ │
│ | ┌─┼──────────────┘ | │
│ │ │ └──────────────┐ │ │
│ ▼ ▼ ▼ ▼ │
│ ┌──────────┐ ┌──────────┐ │
│ │ │ │ │ │
└─▶│ InfluxDB │ │ InfluxDB │◀─┘
│ │ │ │
└──────────┘ └──────────┘
This patch is dependent on this patch:
https://review.openstack.org/#/c/392328/
Change-Id: I05bdaa0e2fb251b48df1d26d09ad63942872293a
This commit is contained in:
Nish Patwa
parent
ff9002ba36
commit
17450f35f3
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@ -0,0 +1,11 @@
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#!/bin/bash
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pushd /opt
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wget -P /opt/ https://storage.googleapis.com/golang/go1.7.3.linux-amd64.tar.gz
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tar -xzf /opt/go1.7.3.linux-amd64.tar.gz -C /opt/
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popd
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pushd /usr/local/bin
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find /opt/go/bin/ -type f -exec ln -sf {} \;
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popd
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if ! grep -qw 'GOROOT="/opt/go"' /etc/environment; then
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echo 'GOROOT="/opt/go"' | tee -a /etc/environment
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fi
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@ -0,0 +1,8 @@
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#!/bin/bash
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rm -rf /opt/influxdb-relay;
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mkdir /opt/influxdb-relay;
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export GOPATH=/opt/influxdb-relay/;
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export GOROOT=/opt/go;
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go get -u github.com/influxdata/influxdb-relay
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@ -18,6 +18,17 @@
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gather_facts: true
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user: root
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tasks:
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- name: Check init system
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command: cat /proc/1/comm
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changed_when: false
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register: _pid1_name
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tags:
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- always
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- name: Set the name of pid1
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set_fact:
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pid1_name: "{{ _pid1_name.stdout }}"
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tags:
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- always
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- name: InfluxDB datapath bind mount
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lxc_container:
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name: "{{ inventory_hostname }}"
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@ -49,9 +60,10 @@
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state: restarted
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- name: Wait for influxdb to be ready
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wait_for:
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host: "{{ hostvars[groups['cluster-metrics'][0]]['ansible_host'] }}"
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host: "{{ hostvars[item]['ansible_host'] }}"
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port: "{{ influxdb_port }}"
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delay: 1
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with_items: "{{ groups['cluster-metrics'] }}"
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- name: Create metrics DB
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shell: >
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influx -username {{ influxdb_db_root_name }}
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@ -62,6 +74,32 @@
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- "CREATE RETENTION POLICY {{ influxdb_db_retention_policy }} ON {{ influxdb_db_name }} DURATION {{ influxdb_db_retention }} REPLICATION {{ influxdb_db_replication }}"
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- "CREATE USER {{ influxdb_db_metric_user }} WITH PASSWORD '{{ influxdb_db_metric_password }}'"
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- "GRANT ALL ON {{ influxdb_db_name }} TO {{ influxdb_db_metric_user }}"
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- name: Install git
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apt:
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pkg: "git"
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state: "latest"
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- name: Install GOLang
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script: files/deploy_go.sh
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- name: Download and install influx-relay
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script: files/deploy_influxdbrelay.sh
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- name: Drop influx relay toml file
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template:
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src: templates/relay.toml.j2
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dest: /opt/influxdb-relay/relay.toml
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- name: Drop Influx Relay upstart
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template:
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src: templates/influxdbrelay.conf.j2
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dest: /etc/init/influxdbrelay.conf
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when: pid1_name == "init"
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- name: Drop Influx Relay service file
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template:
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src: templates/influxdbrelay.service.j2
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dest: /etc/systemd/system/influxdbrelay.service
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when: pid1_name == "systemd"
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- name: Enable and restart influxdb
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service:
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name: "influxdbrelay"
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state: restarted
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vars_files:
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- vars.yml
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@ -37,13 +37,39 @@
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haproxy_backend_nodes: "{{ groups['cluster-metrics'] | default([]) }}"
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haproxy_ssl: "{{ haproxy_ssl }}"
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haproxy_port: 8086
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haproxy_balance_type: tcp
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haproxy_backend_port: 8086
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haproxy_balance_type: http
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haproxy_backend_options:
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- "httpchk HEAD /ping"
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haproxy_whitelist_networks:
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- 192.168.0.0/16
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- 172.16.0.0/12
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- 10.0.0.0/8
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haproxy_acls:
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read_queries:
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rule: "path_sub -i query"
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write_queries:
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rule: "path_sub -i write"
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backend_name: "influxdb_relay"
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- service:
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haproxy_service_name: influxdb_relay
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haproxy_backend_nodes: "{{ groups['cluster-metrics'] | default([]) }}"
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haproxy_ssl: "{{ haproxy_ssl }}"
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haproxy_port: 8086
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haproxy_backend_port: 9096
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haproxy_balance_type: http
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haproxy_backend_options:
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- tcp-check
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haproxy_whitelist_networks:
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- 192.168.0.0/16
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- 172.16.0.0/12
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- 10.0.0.0/8
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haproxy_acls:
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write_queries:
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rule: "path_sub -i write"
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read_queries:
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rule: "path_sub -i query"
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backend_name: "influxdb"
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- service:
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haproxy_service_name: grafana
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haproxy_backend_nodes: "{{ groups['cluster-metrics'] | default([]) }}"
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@ -0,0 +1,6 @@
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description "Influxdb Relay"
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start on runlevel [2345]
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stop on runlevel [016]
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exec /opt/influxdb-relay/bin/influxdb-relay -config /opt/influxdb-relay/relay.toml
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@ -0,0 +1,17 @@
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# If you modify this, please also make sure to edit init.sh
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[Unit]
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Description=Influx relay adds a basic high availability layer to InfluxDB.
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After=network-online.target
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[Service]
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User=influxdb
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Group=influxdb
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LimitNOFILE=65536
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ExecStart=/opt/influxdb-relay/bin/influxdb-relay -config /opt/influxdb-relay/relay.toml
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KillMode=control-group
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Restart=on-failure
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[Install]
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WantedBy=multi-user.target
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Alias=influxd.service
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@ -0,0 +1,10 @@
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[[http]]
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name = "example-http"
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bind-addr = '0.0.0.0:{{ influxdb_relay_port }}'
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output = [
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{% set i =1%}
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{%for host_name in groups['cluster-metrics'] %}
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{ name="local{{ i }}", location = "http://{{ hostvars[host_name]['ansible_host'] }}:{{ influxdb_port }}/write"},
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{%set i = i + 1%}
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{%endfor%}
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]
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omit_hostname = false
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[[outputs.influxdb]]
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urls = ["http://{{ hostvars[groups['cluster-metrics'][0]]['ansible_host'] }}:{{ influxdb_port }}"]
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urls = ["http://{{ internal_lb_vip_address }}:{{ influxdb_port }}"]
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database = "{{ influxdb_db_name }}"
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precision = "s"
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write_consistency = "any"
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@ -35,3 +35,6 @@ influxdb_db_metric_password: SuperDuperSecrete
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# Kapacitor Vars
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kapacitor_port: 9092
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# Influxdb Relay vars
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influxdb_relay_port: 9096
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