mod_proxy_balancer.xml.ja revision 4c881d2fffa365e2e0c5e25eb1cf77f4f9406e44
<?xml version="1.0" encoding="iso-2022-jp"?>
<!-- English Revision: 395228:453630 (outdated) -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<modulesynopsis metafile="mod_proxy_balancer.xml.meta">
<name>mod_proxy_balancer</name>
<description>$BIi2YJ,;6$N$?$a$N(B <module>mod_proxy</module> $B3HD%(B</description>
<status>Extension</status>
<identifier>proxy_balancer_module</identifier>
<compatibility>2.1 $B0J9_(B</compatibility>
<summary>
<p>$BK\%b%8%e!<%k$K$O(B <module>mod_proxy</module> $B$,(B<em>$BI,MW$G$9(B</em>$B!#(B
<code>HTTP</code>, <code>FTP</code> $B$H(B <code>AJP13</code>
$B%W%m%H%3%k$N%m!<%I%P%i%s%95!G=$r;}$C$F$$$^$9!#(B</p>
<p>$B$G$9$+$i!"(B $B%m!<%I%P%i%s%9$rM-8z$K$9$k>l9g(B <module>mod_proxy</module>
$B$H(B <module>mod_proxy_balancer</module> $B$,%5!<%P$KAH$_9~$^$l$F(B
$B$$$J$1$l$P$$$1$^$;$s!#(B</p>
<note type="warning"><title>$B7Y9p(B</title>
>$B0BA4$J%5!<%P$K$9$k(B</a>$B$^$G%W%m%/%75!G=$OM-8z$K$7$J$$$G$/$@$5$$!#(B
$B%*!<%W%s%W%m%-%7%5!<%P$O$"$J$?<+?H$N%M%C%H%o!<%/$K$H$C$F$b!"(B
$B%$%s%?!<%M%C%HA4BN$K$H$C$F$b4m81$G$9!#(B</p>
</note>
</summary>
<seealso><module>mod_proxy</module></seealso>
<section id="scheduler">
<title>$B%m!<%I%P%i%s%5$N%9%1%8%e!<%i$N%"%k%4%j%:%`(B</title>
<p>$B8=;~E@$G$O(B 2 $B<oN`$N%m!<%I%P%i%s%5%9%1%8%e!<%i%"%k%4%j%:%`$+$iA*$Y$^$9!#(B
$B%j%/%(%9%H2s?t$K$h$k$b$N(B <transnote>Request Counting</transnote>
$B$H!"%H%i%U%#%C%/NL$K$h$k$b$N(B <transnote>Weighted Traffic Counting</transnote>
$B$,$"$j$^$9!#%P%i%s%5$N@_Dj(B <code>lbmethod</code> $BCM$G!"$I$A$i$r;H$&$+;XDj$7$^$9!#(B
$B>\:Y$O(B <directive module="mod_proxy">Proxy</directive> $B%G%#%l%/%F%#%V$r(B
$B;2>H$7$F$/$@$5$$!#(B</p>
</section>
<section id="requests">
<title>Request Counting $B%"%k%4%j%:%`(B</title>
<p><code>lbmethod=byrequests</code> $B$GM-8z$K$J$j$^$9!#(B
$B$3$N%9%1%8%e!<%i$NGX7J$K$"$k9M$(J}$O!"MM!9$J%o!<%+!<$,$=$l$>$l!"(B
$B@_Dj$5$l$F$$$kJ,C4%j%/%(%9%H?t$r$-$A$s$H<u$1<h$l$k$h$&$K!"(B
$B%j%/%(%9%H$r07$&$H$$$&9M$(J}$G$9!#<!$N$h$&$KF0:n$7$^$9(B:</p>
<p><dfn>lbfactor</dfn> $B$O!"(B<em>$B$I$NDxEY%o!<%+!<$K;E;v$r?6$k$+(B</em>
$B$D$^$j(B<em>$B%o!<%+!<$N%/%*!<%?(B</em>$B$r;X$7$^$9!#$3$NCM$O(B "$BJ,C4(B"
$BNL$rI=$9@55,2=$5$l$?CM$G$9!#(B</p>
<p><dfn>lbstatus</dfn> $B$O!"(B<em>$B%o!<%+!<$N%/%*!<%?$rK~$?$9$?$a$K(B
$B$I$N$0$i$$5^$.$GF/$+$J$1$l$P$J$i$J$$$+(B</em>$B$r;X$7$^$9!#(B</p>
<p><dfn>$B%o!<%+!<(B</dfn>$B$O%m!<%I%P%i%s%5$N%a%s%P$G!"DL>o$O!"(B
$B%5%]!<%H$5$l$k%W%m%H%3%k$N$&$A$N0l$D$rDs6!$7$F$$$k%j%b!<%H%[%9%H$G$9!#(B
</p>
<p>$B$^$:8D!9$N%o!<%+!<$K%o!<%+!<%/%*!<%?$r3d$j?6$j!"$I$N%o!<%+!<$,:G$b5^$.$G(B
$BF/$+$J$1$l$P$J$i$J$$$+(B (lbstatus $B$,:GBg$N$b$N(B) $B$rD4$Y$^$9!#(B
$B<!$K;E;v$r$9$k$h$&$K$3$N%o!<%+!<$rA*Br$7!"A*Br$7$?%o!<%+!<$N(B lbstatus
$B$rA4BN$K3d$j?6$C$?$V$s$@$1:9$70z$-$^$9!#$G$9$+$i!"(Blbstatus $B$NAmNL$O(B
$B7k2LE*$KJQ2=$7$^$;$s(B(*)$B$7!"%j%/%(%9%H$O4|BTDL$j$KJ,;6$5$l$^$9!#(B</p>
<p>$B$"$k%o!<%+!<$,L58z$K$J$C$F$b!"B>$N$b$N$O@5>o$K%9%1%8%e!<%k$5$lB3$1$^$9!#(B
</p>
<example><pre><code>for each worker in workers
worker lbstatus += worker lbfactor
total factor += worker lbfactor
if worker lbstatus > candidate lbstatus
candidate = worker
candidate lbstatus -= total factor</code></pre>
</example>
<p>$B%P%i%s%5$r<!$N$h$&$K@_Dj$7$?>l9g(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th>
<th>d</th></tr>
<tr><th>lbfactor</th>
<td>25</td>
<td>25</td>
<td>25</td>
<td>25</td></tr>
<tr><th>lbstatus</th>
<td>0</td>
<td>0</td>
<td>0</td>
<td>0</td></tr>
</table>
<p>$B$=$7$F(B <var>b</var> $B$,L58z$K$J$C$?>l9g!"<!$N$h$&$J%9%1%8%e!<%k$,(B
$B9T$o$l$^$9!#(B</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th>
<th>d</th></tr>
<tr><th>lbstatus</th>
<td><em>-50</em></td>
<td>0</td>
<td>25</td>
<td>25</td></tr>
<tr><th>lbstatus</th>
<td>-25</td>
<td>0</td>
<td><em>-25</em></td>
<td>50</td></tr>
<tr><th>lbstatus</th>
<td>0</td>
<td>0</td>
<td>0</td>
<td><em>0</em></td></tr>
<tr><td colspan="5">(repeat)</td></tr>
</table>
<p>$B$D$^$j$3$N$h$&$K%9%1%8%e!<%k$5$l$^$9(B: <var>a</var> <var>c</var>
<var>d</var> <var>a</var> <var>c</var> <var>d</var> <var>a</var>
<var>c</var> <var>d</var> ... $B<!$NE@$KCm0U$7$F$/$@$5$$(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th>
<th>d</th></tr>
<tr><th>lbfactor</th>
<td>25</td>
<td>25</td>
<td>25</td>
<td>25</td></tr>
</table>
<p>$B$3$N5sF0$O!"<!$N@_Dj$HA4$/F1$8$K$J$j$^$9(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th>
<th>d</th></tr>
<tr><th>lbfactor</th>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td></tr>
</table>
<p>This is because all values of <dfn>lbfactor</dfn> are normalized
with respect to the others. For:</p>
<p><dfn>lbfactor</dfn> $B$OA4$F@55,2=$5$l$?$b$N$G!"(B
$BB>$H$NAjBPCM$@$+$i$G$9!#<!$N@_Dj$G$O(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th></tr>
<tr><th>lbfactor</th>
<td>1</td>
<td>4</td>
<td>1</td></tr>
</table>
<p>$B%o!<%+!<(B <var>b</var> $B$O!"J?6Q$7$F!"(B<var>a</var> $B$H(B <var>c</var>
$B$N(B 4 $BG\$N?t$N%j%/%(%9%H$r<u$1;}$D$3$H$K$J$j$^$9!#(B</p>
<p>$B<!$N$h$&$JHsBP>N$J@_Dj$G$O!"$3$&$J$k$HM=A[$5$l$k$G$7$g$&(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th></tr>
<tr><th>lbfactor</th>
<td>70</td>
<td>30</td></tr>
<tr><td colspan="2"> </td></tr>
<tr><th>lbstatus</th>
<td><em>-30</em></td>
<td>30</td></tr>
<tr><th>lbstatus</th>
<td>40</td>
<td><em>-40</em></td></tr>
<tr><th>lbstatus</th>
<td><em>10</em></td>
<td>-10</td></tr>
<tr><th>lbstatus</th>
<td><em>-20</em></td>
<td>20</td></tr>
<tr><th>lbstatus</th>
<td><em>-50</em></td>
<td>50</td></tr>
<tr><th>lbstatus</th>
<td>20</td>
<td><em>-20</em></td></tr>
<tr><th>lbstatus</th>
<td><em>-10</em></td>
<td>10</td></tr>
<tr><th>lbstatus</th>
<td><em>-40</em></td>
<td>40</td></tr>
<tr><th>lbstatus</th>
<td>30</td>
<td><em>-30</em></td></tr>
<tr><th>lbstatus</th>
<td><em>0</em></td>
<td>0</td></tr>
<tr><td colspan="3">(repeat)</td></tr>
</table>
<p>$B%9%1%8%e!<%k$O(B 10 $B%9%1%8%e!<%k8e$K7+$jJV$5$l!"(B<var>a</var> 7 $B2s$H(B
<var>b</var> 3 $B2s$G$^$P$i$KA*$P$l$^$9!#(B</p>
</section>
<section id="traffic">
<title>Weighted Traffic Counting $B%"%k%4%j%:%`(B</title>
<p><code>lbmethod=bytraffic</code> $B$GM-8z$K$J$j$^$9!#(B
$B$3$N%9%1%8%e!<%i$NGX7J$K$"$k9M$(J}$O!"(BRequest Counting
$B$HHs>o$K;w$F$$$^$9$,!"<!$N0c$$$,$"$j$^$9(B:</p>
<p><dfn>lbfactor</dfn> $B$O(B <em>$B$I$l$@$1$N%P%$%H?t$N%H%i%U%#%C%/NL$r!"(B
$B$3$N%o!<%+!<$K=hM}$7$F$b$i$$$?$$$+(B</em> $B$rI=$7$^$9!#(B
$B$3$NCM$bF1MM$K@55,2=$5$l$?CM$G!"%o!<%+!<A4BN$N$&$A$G$N(B "$BJ,C4(B"
$BNL$rI=8=$7$F$$$^$9!#%j%/%(%9%H?t$rC1=c$K?t$($kBe$o$j$K!"(B
$B$I$l$@$1$NE>AwNL$r=hM}$7$?$+$r?t$($^$9!#(B</p>
<p>$B<!$N$h$&$K%P%i%s%5$r@_Dj$7$?>l9g(B:</p>
<table style="data">
<tr><th>worker</th>
<th>a</th>
<th>b</th>
<th>c</th></tr>
<tr><th>lbfactor</th>
<td>1</td>
<td>2</td>
<td>1</td></tr>
</table>
<p><var>b</var> $B$K$O(B <var>a</var> $B$d(B <var>c</var> $B$N(B 2 $BG\(B
$B=hM}$7$F$[$7$$$H$$$&$3$H$K$J$j$^$9!#(B
<var>b</var> $B$O(B 2 $BG\$N(B I/O $B$r=hM}$9$k$H$$$&0UL#$K$J$j!"(B
2 $BG\$N%j%/%(%9%H?t$r=hM}$9$k$H$$$&$3$H$K$O$J$j$^$;$s!#(B
$B$G$9$+$i%j%/%(%9%H$H%l%9%]%s%9$N%5%$%:$,!"(B
$B=E$_IU$1$H?6$jJ,$1$N%"%k%4%j%:%`$K8z$$$F$$$^$9!#(B</p>
</section>
<section id="enable">
<title>$B%P%i%s%5%^%M!<%8%c$N%5%]!<%H$rM-8z$K$9$k(B</title>
<p>$B$3$N%b%8%e!<%k$O(B <module>mod_status</module> $B$N%5!<%S%9$r(B
<em>$BI,MW$H$7$^$9(B</em>$B!#(B
$B%P%i%s%5%^%M!<%8%c$r;H$&$H!"%P%i%s%5$N%a%s%P!<$NF0E*$J99?7$,(B
$B$G$-$^$9!#%P%i%s%5%^%M!<%8%c$r;H$C$F!"%P%i%s%978?t(B (lbfactor)
$B$rJQ99$7$?$j!"%a%s%P!<$rJQ99$7$?$j!"FCDj$N%a%s%P!<$r(B
$B%*%U%i%$%s%b!<%I$K$7$?$j$G$-$^$9!#(B</p>
<p>$B$G$9$+$i!"%m!<%I%P%i%s%54IM}5!G=$r;H$$$?$1$l$P!"(B
<module>mod_status</module> $B$H(B <module>mod_proxy_balancer</module>
$B$r%5!<%P$KAH$_9~$^$J$1$l$P$J$j$^$;$s!#(B</p>
<p>foo.com $B%I%a%$%s$N%V%i%&%6$+$i%m!<%I%P%i%s%54IM}5!G=$r(B
$B$KDI2C$7$^$9!#(B</p>
<example>
<Location /balancer-manager><br />
SetHandler balancer-manager<br />
<br />
Order Deny,Allow<br />
Deny from all<br />
Allow from .foo.com<br />
</Location>
</example>
$B$N%Z!<%87PM3$G!"%&%'%V%V%i%&%6$+$i%m!<%I%P%i%s%5%^%M!<%8%c$K(B
$B%"%/%;%9$G$-$k$h$&$K$J$j$^$9!#(B</p>
</section>
</modulesynopsis>