$ opm get kwanhur/lua-resty-maghash

lua-resty-maghash

lua-resty-maghash implements Google's load balance solution - Maglev's consistent hashing algorithm

Synopsis

        lua_package_path "/path/to/lua-resty-maghash/lib/?.lua;;";
    
        server {
            location /test {
                content_by_lua '
                local cjson = require('cjson.safe')
                local maghash = require('resty.maghash')
                local mag = maghash:new(7)
    
                mag:add_backend('b1')
                mag:add_backend('b2')
                mag:add_backend('b3')
                local lookup = mag:lookup()
                ngx.print(cjson.encode(lookup))
                local entry = mag.entry
                ngx.print(cjson.encode(entry))
                
                mag:remove_backend('b3')
                local lookup = mag:lookup()
                ngx.print(cjson.encode(lookup))
                local entry = mag.entry
                ngx.print(cjson.encode(entry))
                ';
            }
        }

Methods

new

syntax: mag = maghash:new(m)

Create a new maghash object.

add_backend

syntax: mag:add_backend(backend)

Add a backend into mag backends

remove_backend

syntax: mag:remove_backend(backend)

Remove a backend from mag backends

get_backend

syntax: backend = mag:get_backend('abc123&^%')

Fetch the backend for specified content

lookup

syntax: lookup = mag:lookup()

Fetch all the backend

Installation

You can install it with opm. Just like that: opm install kwanhur/lua-resty-maghash

Dependency

• lua-resty-xxhash

• lua-resty-murmurhash

Authors

kwanhur <huang_hua2012@163.com>, VIPS Inc.

Copyright and License

This module is licensed under the BSD 2-Clause License .

Copyright (C) 2016, by kwanhur <huang_hua2012@163.com>, VIPS Inc.

All rights reserved.

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.