mod_proxy_balancer.xml.ja revision a2652f3451528565db1f85db6953fc30799d7ead
<?xml version="1.0" encoding="iso-2022-jp"?>
<!-- English Revision: 239684 -->
<!--
Copyright 2004-2006 The Apache Software Foundation or its licensors, as
applicable.
Licensed 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>