Name

nginx-stream-upsync-module - Nginx C module, sync upstreams from consul or others, dynamiclly modify backend-servers attribute(weight, max_fails,...), needn't reload nginx.

It may not always be convenient to modify configuration files and restart NGINX. For example, if you are experiencing large amounts of traffic and high load, restarting NGINX and reloading the configuration at that point further increases load on the system and can temporarily degrade performance.

The module can be more smoothly expansion and constriction, and will not influence the performance.

Another module, nginx-upsync-module supports nginx http module(HTTP protocol), please be noticed.

Name
Status
Synopsis
Description
Directives
Consul_interface
Etcd_interface
TODO
Compatibility
Installation
Author
Copyright and License
See Also
Source Dependency

Status

This module is still under active development and is considered production ready.

Synopsis

nginx-consul:

stream {
    upstream test {
        # fake server otherwise ngx_stream_upstream will report error when startup
        server 127.0.0.1:11111;

        # all backend server will pull from consul when startup and will delete fake server
        upsync 127.0.0.1:8500/v1/kv/upstreams/test upsync_timeout=6m upsync_interval=500ms upsync_type=consul strong_dependency=off;
        upsync_dump_path /usr/local/nginx/conf/servers/servers_test.conf;
    }

    upstream bar {
        server 127.0.0.1:8090 weight=1, fail_timeout=10, max_fails=3;
    }

    server {
        listen 12345;

        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass test;
    }

    server {
        listen 2345;

        upstream_show
    }

    server {
        listen 127.0.0.1:9091;

        proxy_responses 1;
        proxy_timeout 20s;
        proxy_pass bar;
    }
}

nginx-etcd:

stream {
    upstream test {
        # fake server otherwise ngx_stream_upstream will report error when startup
        server 127.0.0.1:11111;

        # all backend server will pull from etcd when startup and will delete fake server
        upsync 127.0.0.1:8500/v2/keys/upstreams/test upsync_timeout=6m upsync_interval=500ms upsync_type=etcd strong_dependency=off;
        upsync_dump_path /usr/local/nginx/conf/servers/servers_test.conf;
    }

    upstream bar {
        server 127.0.0.1:8090 weight=1, fail_timeout=10, max_fails=3;
    }

    server {
        listen 12345;

        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass test;
    }

    server {
        listen 2345;

        upstream_show
    }

    server {
        listen 127.0.0.1:9091;

        proxy_responses 1;
        proxy_timeout 20s;
        proxy_pass bar;
    }
}

upsync_lb:

stream {
    upstream test {
        least_conn; //hash $uri consistent;
        # fake server otherwise ngx_http_upstream will report error when startup
        server 127.0.0.1:11111;

        # all backend server will pull from consul/etcf when startup and will delete fake server
        upsync 127.0.0.1:8500/v1/kv/upstreams/test upsync_timeout=6m upsync_interval=500ms upsync_type=consul strong_dependency=off;
        upsync_dump_path /usr/local/nginx/conf/servers/servers_test.conf;
        upsync_lb least_conn; //hash_ketama;
    }

    upstream bar {
        server 127.0.0.1:8090 weight=1, fail_timeout=10, max_fails=3;
    }

    server {
        listen 12345;

        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass test;
    }

    server {
        listen 2345;

        upstream_show
    }

    server {
        listen 127.0.0.1:9091;

        proxy_responses 1;
        proxy_timeout 20s;
        proxy_pass bar;
    }
}

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Description

This module provides a method to discover backend servers. Supporting dynamicly adding or deleting backend server through consul and dynamicly adjusting backend servers weight, module will timely pull new backend server list from consul/etcd to upsync nginx ip router. Nginx needn't reload. Having some advantages than others:

timely

module send key to consul with index, consul will compare it with its index, if index doesn't change connection will hang five minutes, in the period any operation to the key-value, will feed back rightaway.

performance

Pulling from consul equal a request to nginx, updating ip router nginx needn't reload, so affecting nginx performance is little.

stability

Even if one pulling failed, it will pull next upsync_interval, so guaranteing backend server stably provides service. And support dumping the latest config to location, so even if consul hung up, and nginx can be reload anytime.

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Diretives

upsync

syntax: upsync $consul.api.com:$port/v1/kv/upstreams/$upstream_name [upsync_type=consul] [upsync_interval=second/minutes] [upsync_timeout=second/minutes] [strong_dependency=off/on]

default: none, if parameters omitted, default parameters are upsync_interval=5s upsync_timeout=6m strong_dependency=off

context: upstream

description: Pull upstream servers from consul/etcd... .

The parameters' meanings are:

upsync_interval

pulling servers from consul interval time.
upsync_timeout

pulling servers from consul request timeout.
upsync_type

pulling servers from conf server type.
strong_dependency

when nginx start up if depending on consul, and consul is not working, nginx will boot failed, otherwise booting normally.

upsync_dump_path

syntax: upsync_dump_path $path

default: /tmp/servers_$host.conf

context: upstream

description: dump the upstream backends to the $path.

upsync_lb

syntax: upsync_lb $load_balance

default: round_robin/ip_hash/hash modula

context: upstream

description: mainly for least_conn and hash consistent, when using one of them, you must point out using upsync_lb.

upsync_show

syntax: upsync_show

default: none

context: server

description: show all upstreams.

curl http://localhost:2345/upstream_show

show all upstreams

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Consul_interface

you can add or delete backend server through consul_ui or http_interface.

http_interface example:

    curl -X PUT http://$consul_ip:$port/v1/kv/upstreams/$upstream_name/$backend_ip:$backend_port

default: weight=1 max_fails=2 fail_timeout=10 down=0 backup=0;

    curl -X PUT -d "{\"weight\":1, \"max_fails\":2, \"fail_timeout\":10}" http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port
or
    curl -X PUT -d '{"weight":1, "max_fails":2, "fail_timeout":10}' http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port

value support json format.

delete

    curl -X DELETE http://$consul_ip:$port/v1/kv/upstreams/$upstream_name/$backend_ip:$backend_port

adjust-weight

    curl -X PUT -d "{\"weight\":2, \"max_fails\":2, \"fail_timeout\":10}" http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port
or
    curl -X PUT -d '{"weight":2, "max_fails":2, "fail_timeout":10}' http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port

mark server-down

    curl -X PUT -d "{\"weight\":2, \"max_fails\":2, \"fail_timeout\":10, \"down\":1}" http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port
or
    curl -X PUT -d '{"weight":2, "max_fails":2, "fail_timeout":10, "down":1}' http://$consul_ip:$port/v1/kv/$dir1/$upstream_name/$backend_ip:$backend_port

check

    curl http://$consul_ip:$port/v1/kv/upstreams/$upstream_name?recurse

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Etcd_interface

you can add or delete backend server through http_interface.

mainly like consul, http_interface example:

    curl -X PUT http://$consul_ip:$port/v2/keys/upstreams/$upstream_name/$backend_ip:$backend_port

default: weight=1 max_fails=2 fail_timeout=10 down=0 backup=0;

    curl -X PUT -d value="{\"weight\":1, \"max_fails\":2, \"fail_timeout\":10}" http://$etcd_ip:$port/v2/keys/$dir1/$upstream_name/$backend_ip:$backend_port

value support json format.

delete

    curl -X DELETE http://$etcd_ip:$port/v2/keys/upstreams/$upstream_name/$backend_ip:$backend_port

adjust-weight

    curl -X PUT -d "{\"weight\":2, \"max_fails\":2, \"fail_timeout\":10}" http://$etcd_ip:$port/v2/keys/$dir1/$upstream_name/$backend_ip:$backend_port

mark server-down

    curl -X PUT -d value="{\"weight\":2, \"max_fails\":2, \"fail_timeout\":10, \"down\":1}" http://$etcd_ip:$port/v2/keys/$dir1/$upstream_name/$backend_ip:$backend_port

check

    curl http://$etcd_ip:$port/v2/keys/upstreams/$upstream_name

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TODO

support to show upstreams
support zookeeper and so on

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Compatibility

The module was developed base on nginx-1.9.10.

Compatible with Nginx-1.9.10+.

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Installation

This module can be used independently, can be downloadGithub.

Grab the nginx source code from nginx.org, for example, the version 1.8.0 (see nginx compatibility), and then build the source with this module:

wget 'http://nginx.org/download/nginx-1.8.0.tar.gz'
tar -xzvf nginx-1.8.0.tar.gz
cd nginx-1.8.0/

./configure --add-module=/path/to/nginx-stream_upsync-module
make
make install

if you support nginx-upstream-check-module

./configure --add-module=/path/to/nginx-upstream-check-module --add-module=/path/to/nginx-stream_upsync-module
make
make install

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Author

Xiaokai Wang (王晓开) [email protected], Weibo Inc.

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Copyright and License

This README template copy from agentzh.

This module is licensed under the BSD license.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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source dependency

Cjson: https://github.com/kbranigan/cJSON
http-parser: https://github.com/nodejs/http-parser

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senthilkumarkj / nginx-stream-upsync-module Goto Github PK

nginx-stream-upsync-module's Introduction

Name

Table of Contents

Status

Synopsis

Description

Diretives

upsync

upsync_dump_path

upsync_lb

upsync_show

Consul_interface

Etcd_interface

TODO

Compatibility

Installation

Author

Copyright and License

see also

source dependency

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