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308 lines
10 KiB
XML
308 lines
10 KiB
XML
<?xml version="1.0" encoding="iso-2022-jp"?>
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<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
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<?xml-stylesheet type="text/xsl" href="../style/manual.ja.xsl"?>
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<!-- English Revision: 239684 -->
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<!--
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Copyright 2004-2005 The Apache Software Foundation or its licensors, as
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applicable.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<modulesynopsis metafile="mod_proxy_balancer.xml.meta">
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<name>mod_proxy_balancer</name>
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<description>$BIi2YJ,;6$N$?$a$N(B <module>mod_proxy</module> $B3HD%(B</description>
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<status>Extension</status>
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<sourcefile>proxy_balancer.c</sourcefile>
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<identifier>proxy_balancer_module</identifier>
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<compatibility>2.1 $B0J9_(B</compatibility>
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<summary>
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<p>$BK\%b%8%e!<%k$K$O(B <module>mod_proxy</module> $B$,(B<em>$BI,MW$G$9(B</em>$B!#(B
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<code>HTTP</code>, <code>FTP</code> $B$H(B <code>AJP13</code>
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$B%W%m%H%3%k$N%m!<%I%P%i%s%95!G=$r;}$C$F$$$^$9!#(B</p>
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<p>$B$G$9$+$i!"(B $B%m!<%I%P%i%s%9$rM-8z$K$9$k>l9g(B <module>mod_proxy</module>
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$B$H(B <module>mod_proxy_balancer</module> $B$,%5!<%P$KAH$_9~$^$l$F(B
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$B$$$J$1$l$P$$$1$^$;$s!#(B</p>
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<note type="warning"><title>$B7Y9p(B</title>
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<p><a href="mod_proxy.html#access"
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>$B0BA4$J%5!<%P$K$9$k(B</a>$B$^$G%W%m%/%75!G=$OM-8z$K$7$J$$$G$/$@$5$$!#(B
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$B%*!<%W%s%W%m%-%7%5!<%P$O$"$J$?<+?H$N%M%C%H%o!<%/$K$H$C$F$b!"(B
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$B%$%s%?!<%M%C%HA4BN$K$H$C$F$b4m81$G$9!#(B</p>
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</note>
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</summary>
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<seealso><module>mod_proxy</module></seealso>
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<section id="scheduler">
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<title>$B%m!<%I%P%i%s%5$N%9%1%8%e!<%i$N%"%k%4%j%:%`(B</title>
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<p>$B8=;~E@$G$O(B 2 $B<oN`$N%m!<%I%P%i%s%5%9%1%8%e!<%i%"%k%4%j%:%`$+$iA*$Y$^$9!#(B
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$B%j%/%(%9%H2s?t$K$h$k$b$N(B <transnote>Request Counting</transnote>
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$B$H!"%H%i%U%#%C%/NL$K$h$k$b$N(B <transnote>Weighted Traffic Counting</transnote>
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$B$,$"$j$^$9!#%P%i%s%5$N@_Dj(B <code>lbmethod</code> $BCM$G!"$I$A$i$r;H$&$+;XDj$7$^$9!#(B
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$B>\:Y$O(B <directive module="mod_proxy">Proxy</directive> $B%G%#%l%/%F%#%V$r(B
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$B;2>H$7$F$/$@$5$$!#(B</p>
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</section>
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<section id="requests">
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<title>Request Counting $B%"%k%4%j%:%`(B</title>
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<p><code>lbmethod=byrequests</code> $B$GM-8z$K$J$j$^$9!#(B
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$B$3$N%9%1%8%e!<%i$NGX7J$K$"$k9M$(J}$O!"MM!9$J%o!<%+!<$,$=$l$>$l!"(B
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$B@_Dj$5$l$F$$$kJ,C4%j%/%(%9%H?t$r$-$A$s$H<u$1<h$l$k$h$&$K!"(B
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$B%j%/%(%9%H$r07$&$H$$$&9M$(J}$G$9!#<!$N$h$&$KF0:n$7$^$9(B:</p>
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<p><dfn>lbfactor</dfn> $B$O!"(B<em>$B$I$NDxEY%o!<%+!<$K;E;v$r?6$k$+(B</em>
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$B$D$^$j(B<em>$B%o!<%+!<$N%/%*!<%?(B</em>$B$r;X$7$^$9!#$3$NCM$O(B "$BJ,C4(B"
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$BNL$rI=$9@55,2=$5$l$?CM$G$9!#(B</p>
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<p><dfn>lbstatus</dfn> $B$O!"(B<em>$B%o!<%+!<$N%/%*!<%?$rK~$?$9$?$a$K(B
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$B$I$N$0$i$$5^$.$GF/$+$J$1$l$P$J$i$J$$$+(B</em>$B$r;X$7$^$9!#(B</p>
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<p><dfn>$B%o!<%+!<(B</dfn>$B$O%m!<%I%P%i%s%5$N%a%s%P$G!"DL>o$O!"(B
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$B%5%]!<%H$5$l$k%W%m%H%3%k$N$&$A$N0l$D$rDs6!$7$F$$$k%j%b!<%H%[%9%H$G$9!#(B
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</p>
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<p>$B$^$:8D!9$N%o!<%+!<$K%o!<%+!<%/%*!<%?$r3d$j?6$j!"$I$N%o!<%+!<$,:G$b5^$.$G(B
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$BF/$+$J$1$l$P$J$i$J$$$+(B (lbstatus $B$,:GBg$N$b$N(B) $B$rD4$Y$^$9!#(B
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$B<!$K;E;v$r$9$k$h$&$K$3$N%o!<%+!<$rA*Br$7!"A*Br$7$?%o!<%+!<$N(B lbstatus
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$B$rA4BN$K3d$j?6$C$?$V$s$@$1:9$70z$-$^$9!#$G$9$+$i!"(Blbstatus $B$NAmNL$O(B
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$B7k2LE*$KJQ2=$7$^$;$s(B(*)$B$7!"%j%/%(%9%H$O4|BTDL$j$KJ,;6$5$l$^$9!#(B</p>
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<p>$B$"$k%o!<%+!<$,L58z$K$J$C$F$b!"B>$N$b$N$O@5>o$K%9%1%8%e!<%k$5$lB3$1$^$9!#(B
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</p>
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<example><pre><code>for each worker in workers
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worker lbstatus += worker lbfactor
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total factor += worker lbfactor
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if worker lbstatus > candidate lbstatus
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candidate = worker
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candidate lbstatus -= total factor</code></pre>
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</example>
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<p>$B%P%i%s%5$r<!$N$h$&$K@_Dj$7$?>l9g(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th>
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<th>d</th></tr>
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<tr><th>lbfactor</th>
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<td>25</td>
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<td>25</td>
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<td>25</td>
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<td>25</td></tr>
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<tr><th>lbstatus</th>
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<td>0</td>
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<td>0</td>
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<td>0</td>
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<td>0</td></tr>
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</table>
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<p>$B$=$7$F(B <var>b</var> $B$,L58z$K$J$C$?>l9g!"<!$N$h$&$J%9%1%8%e!<%k$,(B
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$B9T$o$l$^$9!#(B</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th>
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<th>d</th></tr>
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<tr><th>lbstatus</th>
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<td><em>-50</em></td>
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<td>0</td>
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<td>25</td>
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<td>25</td></tr>
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<tr><th>lbstatus</th>
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<td>-25</td>
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<td>0</td>
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<td><em>-25</em></td>
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<td>50</td></tr>
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<tr><th>lbstatus</th>
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<td>0</td>
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<td>0</td>
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<td>0</td>
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<td><em>0</em></td></tr>
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<tr><td colspan="5">(repeat)</td></tr>
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</table>
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<p>$B$D$^$j$3$N$h$&$K%9%1%8%e!<%k$5$l$^$9(B: <var>a</var> <var>c</var>
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<var>d</var> <var>a</var> <var>c</var> <var>d</var> <var>a</var>
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<var>c</var> <var>d</var> ... $B<!$NE@$KCm0U$7$F$/$@$5$$(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th>
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<th>d</th></tr>
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<tr><th>lbfactor</th>
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<td>25</td>
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<td>25</td>
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<td>25</td>
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<td>25</td></tr>
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</table>
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<p>$B$3$N5sF0$O!"<!$N@_Dj$HA4$/F1$8$K$J$j$^$9(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th>
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<th>d</th></tr>
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<tr><th>lbfactor</th>
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<td>1</td>
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<td>1</td>
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<td>1</td>
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<td>1</td></tr>
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</table>
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<p>This is because all values of <dfn>lbfactor</dfn> are normalized
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with respect to the others. For:</p>
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<p><dfn>lbfactor</dfn> $B$OA4$F@55,2=$5$l$?$b$N$G!"(B
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$BB>$H$NAjBPCM$@$+$i$G$9!#<!$N@_Dj$G$O(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th></tr>
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<tr><th>lbfactor</th>
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<td>1</td>
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<td>4</td>
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<td>1</td></tr>
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</table>
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<p>$B%o!<%+!<(B <var>b</var> $B$O!"J?6Q$7$F!"(B<var>a</var> $B$H(B <var>c</var>
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$B$N(B 4 $BG\$N?t$N%j%/%(%9%H$r<u$1;}$D$3$H$K$J$j$^$9!#(B</p>
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<p>$B<!$N$h$&$JHsBP>N$J@_Dj$G$O!"$3$&$J$k$HM=A[$5$l$k$G$7$g$&(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th></tr>
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<tr><th>lbfactor</th>
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<td>70</td>
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<td>30</td></tr>
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<tr><td colspan="2"> </td></tr>
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<tr><th>lbstatus</th>
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<td><em>-30</em></td>
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<td>30</td></tr>
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<tr><th>lbstatus</th>
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<td>40</td>
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<td><em>-40</em></td></tr>
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<tr><th>lbstatus</th>
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<td><em>10</em></td>
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<td>-10</td></tr>
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<tr><th>lbstatus</th>
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<td><em>-20</em></td>
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<td>20</td></tr>
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<tr><th>lbstatus</th>
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<td><em>-50</em></td>
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<td>50</td></tr>
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<tr><th>lbstatus</th>
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<td>20</td>
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<td><em>-20</em></td></tr>
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<tr><th>lbstatus</th>
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<td><em>-10</em></td>
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<td>10</td></tr>
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<tr><th>lbstatus</th>
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<td><em>-40</em></td>
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<td>40</td></tr>
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<tr><th>lbstatus</th>
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<td>30</td>
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<td><em>-30</em></td></tr>
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<tr><th>lbstatus</th>
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<td><em>0</em></td>
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<td>0</td></tr>
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<tr><td colspan="3">(repeat)</td></tr>
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</table>
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<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
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<var>b</var> 3 $B2s$G$^$P$i$KA*$P$l$^$9!#(B</p>
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</section>
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<section id="traffic">
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<title>Weighted Traffic Counting $B%"%k%4%j%:%`(B</title>
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<p><code>lbmethod=bytraffic</code> $B$GM-8z$K$J$j$^$9!#(B
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$B$3$N%9%1%8%e!<%i$NGX7J$K$"$k9M$(J}$O!"(BRequest Counting
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$B$HHs>o$K;w$F$$$^$9$,!"<!$N0c$$$,$"$j$^$9(B:</p>
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<p><dfn>lbfactor</dfn> $B$O(B <em>$B$I$l$@$1$N%P%$%H?t$N%H%i%U%#%C%/NL$r!"(B
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$B$3$N%o!<%+!<$K=hM}$7$F$b$i$$$?$$$+(B</em> $B$rI=$7$^$9!#(B
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$B$3$NCM$bF1MM$K@55,2=$5$l$?CM$G!"%o!<%+!<A4BN$N$&$A$G$N(B "$BJ,C4(B"
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$BNL$rI=8=$7$F$$$^$9!#%j%/%(%9%H?t$rC1=c$K?t$($kBe$o$j$K!"(B
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$B$I$l$@$1$NE>AwNL$r=hM}$7$?$+$r?t$($^$9!#(B</p>
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<p>$B<!$N$h$&$K%P%i%s%5$r@_Dj$7$?>l9g(B:</p>
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<table style="data">
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<tr><th>worker</th>
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<th>a</th>
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<th>b</th>
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<th>c</th></tr>
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<tr><th>lbfactor</th>
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<td>1</td>
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<td>2</td>
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<td>1</td></tr>
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</table>
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<p><var>b</var> $B$K$O(B <var>a</var> $B$d(B <var>c</var> $B$N(B 2 $BG\(B
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$B=hM}$7$F$[$7$$$H$$$&$3$H$K$J$j$^$9!#(B
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<var>b</var> $B$O(B 2 $BG\$N(B I/O $B$r=hM}$9$k$H$$$&0UL#$K$J$j!"(B
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2 $BG\$N%j%/%(%9%H?t$r=hM}$9$k$H$$$&$3$H$K$O$J$j$^$;$s!#(B
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$B$G$9$+$i%j%/%(%9%H$H%l%9%]%s%9$N%5%$%:$,!"(B
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$B=E$_IU$1$H?6$jJ,$1$N%"%k%4%j%:%`$K8z$$$F$$$^$9!#(B</p>
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</section>
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<section id="enable">
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<title>$B%P%i%s%5%^%M!<%8%c$N%5%]!<%H$rM-8z$K$9$k(B</title>
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<p>$B$3$N%b%8%e!<%k$O(B <module>mod_status</module> $B$N%5!<%S%9$r(B
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<em>$BI,MW$H$7$^$9(B</em>$B!#(B
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$B%P%i%s%5%^%M!<%8%c$r;H$&$H!"%P%i%s%5$N%a%s%P!<$NF0E*$J99?7$,(B
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$B$G$-$^$9!#%P%i%s%5%^%M!<%8%c$r;H$C$F!"%P%i%s%978?t(B (lbfactor)
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$B$rJQ99$7$?$j!"%a%s%P!<$rJQ99$7$?$j!"FCDj$N%a%s%P!<$r(B
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$B%*%U%i%$%s%b!<%I$K$7$?$j$G$-$^$9!#(B</p>
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<p>$B$G$9$+$i!"%m!<%I%P%i%s%54IM}5!G=$r;H$$$?$1$l$P!"(B
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<module>mod_status</module> $B$H(B <module>mod_proxy_balancer</module>
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$B$r%5!<%P$KAH$_9~$^$J$1$l$P$J$j$^$;$s!#(B</p>
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<p>foo.com $B%I%a%$%s$N%V%i%&%6$+$i%m!<%I%P%i%s%54IM}5!G=$r(B
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$B;H$($k$h$&$K$9$k$K$O!"<!$N$h$&$J%3!<%I$r(B <code>httpd.conf</code>
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$B$KDI2C$7$^$9!#(B</p>
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<example>
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<Location /balancer-manager><br />
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SetHandler balancer-manager<br />
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<br />
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Order Deny,Allow<br />
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Deny from all<br />
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Allow from .foo.com<br />
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</Location>
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</example>
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<p>$B$3$&$9$k$H!"(B<code>http://your.server.name/balancer-manager</code>
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$B$N%Z!<%87PM3$G!"%&%'%V%V%i%&%6$+$i%m!<%I%P%i%s%5%^%M!<%8%c$K(B
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$B%"%/%;%9$G$-$k$h$&$K$J$j$^$9!#(B</p>
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</section>
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</modulesynopsis>
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