| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| UpdateNginx |
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| 1.2;1.2 | ||||
| UpdateNginx$1 |
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| 1.2;1.2 |
| 1 | /** | |
| 2 | * Copyright (c) 2014-2015, Thindeck.com | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: 1) Redistributions of source code must retain the above | |
| 8 | * copyright notice, this list of conditions and the following | |
| 9 | * disclaimer. 2) Redistributions in binary form must reproduce the above | |
| 10 | * copyright notice, this list of conditions and the following | |
| 11 | * disclaimer in the documentation and/or other materials provided | |
| 12 | * with the distribution. 3) Neither the name of the thindeck.com nor | |
| 13 | * the names of its contributors may be used to endorse or promote | |
| 14 | * products derived from this software without specific prior written | |
| 15 | * permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT | |
| 19 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
| 21 | * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 22 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 26 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 28 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | */ | |
| 30 | package com.thindeck.agents; | |
| 31 | ||
| 32 | import com.google.common.base.Function; | |
| 33 | import com.google.common.base.Joiner; | |
| 34 | import com.google.common.collect.Iterables; | |
| 35 | import com.jcabi.immutable.ArrayMap; | |
| 36 | import com.jcabi.xml.XML; | |
| 37 | import com.thindeck.api.Agent; | |
| 38 | import java.io.IOException; | |
| 39 | import org.xembly.Directive; | |
| 40 | import org.xembly.Directives; | |
| 41 | ||
| 42 | /** | |
| 43 | * Update nginx load balancer. | |
| 44 | * | |
| 45 | * <p>Assumption is that ngnix configuration loaded from {@code ngnix.conf} | |
| 46 | * and each host has a conf file named {@code www.example.com.conf}, | |
| 47 | * which will contain load balancing group, e.g: | |
| 48 | * | |
| 49 | * <pre> upstream example_servers { | |
| 50 | * server 10.0.0.1:80; | |
| 51 | * server 10.0.0.2:80; | |
| 52 | * } | |
| 53 | * server { | |
| 54 | * listen 80; | |
| 55 | * server_name www.example.com; | |
| 56 | * location / { | |
| 57 | * proxy_pass http://example_servers; | |
| 58 | * } | |
| 59 | * }</pre> | |
| 60 | * | |
| 61 | * <p>This file is loaded from main {@code ngnix.conf} | |
| 62 | * using {@code include} directive. | |
| 63 | * | |
| 64 | * <p>To install nginx on a clean server, just install it first using | |
| 65 | * "apt-get" or "yum" and that's it.</> | |
| 66 | * | |
| 67 | * @author Krzysztof Krason (Krzysztof.Krason@gmail.com) | |
| 68 | * @author Yegor Bugayenko (yegor@teamed.io) | |
| 69 | * @version $Id$ | |
| 70 | * @checkstyle MultipleStringLiterals (300 lines) | |
| 71 | */ | |
| 72 | public final class UpdateNginx implements Agent { | |
| 73 | ||
| 74 | /** | |
| 75 | * Script to use. | |
| 76 | */ | |
| 77 | private final transient Script script; | |
| 78 | ||
| 79 | /** | |
| 80 | * Ctor. | |
| 81 | * @throws IOException If fails | |
| 82 | */ | |
| 83 | public UpdateNginx() throws IOException { | |
| 84 | 0 | this( |
| 85 | new Script.Default( | |
| 86 | UpdateNginx.class.getResource("update-nginx.sh") | |
| 87 | ) | |
| 88 | ); | |
| 89 | 0 | } |
| 90 | ||
| 91 | /** | |
| 92 | * Ctor. | |
| 93 | * @param spt Script. | |
| 94 | */ | |
| 95 | 1 | public UpdateNginx(final Script spt) { |
| 96 | 1 | this.script = spt; |
| 97 | 1 | } |
| 98 | ||
| 99 | @Override | |
| 100 | public Iterable<Directive> exec(final XML deck) throws IOException { | |
| 101 | 0 | for (final String domain : deck.xpath("/deck/domains/domain/text()")) { |
| 102 | 0 | this.update(domain, deck); |
| 103 | 0 | } |
| 104 | 0 | return new Directives(); |
| 105 | } | |
| 106 | ||
| 107 | /** | |
| 108 | * Update for one domain. | |
| 109 | * @param domain Domain name | |
| 110 | * @param deck The deck | |
| 111 | * @throws IOException If fails | |
| 112 | */ | |
| 113 | private void update(final String domain, final XML deck) | |
| 114 | throws IOException { | |
| 115 | // @checkstyle LineLength (1 line) | |
| 116 | 0 | final String terms = "not(@waste) and @type='green' and @state='alive' and http"; |
| 117 | 0 | final String servers = Joiner.on(' ').join( |
| 118 | Iterables.transform( | |
| 119 | deck.nodes(String.format("//container[%s]", terms)), | |
| 120 | 0 | new Function<XML, String>() { |
| 121 | @Override | |
| 122 | public String apply(final XML ctr) { | |
| 123 | 0 | return String.format( |
| 124 | "server %s:%s; ", | |
| 125 | ctr.xpath("host/text()").get(0), | |
| 126 | ctr.xpath("http/text()").get(0) | |
| 127 | ); | |
| 128 | } | |
| 129 | } | |
| 130 | ) | |
| 131 | ); | |
| 132 | 0 | this.script.exec( |
| 133 | "t1.thindeck.com", | |
| 134 | new ArrayMap<String, String>() | |
| 135 | .with("deck", deck.xpath("/deck/@name").get(0)) | |
| 136 | .with( | |
| 137 | "images", | |
| 138 | Joiner.on(',').join( | |
| 139 | deck.xpath( | |
| 140 | String.format("//container[%s]/image/text()", terms) | |
| 141 | ) | |
| 142 | ) | |
| 143 | ) | |
| 144 | .with("port", "80") | |
| 145 | .with("group", domain.replace(".", "_")) | |
| 146 | .with("domain", domain) | |
| 147 | .with("servers", servers) | |
| 148 | ); | |
| 149 | 0 | } |
| 150 | ||
| 151 | } |