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8 <title>GLEP 19 -- Gentoo Stable Portage Tree</title>
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19 [<b><a href="http://www.gentoo.org/">Gentoo Linux Home</a></b>]
20 [<b><a href="http://www.gentoo.org/proj/en/glep">GLEP Index</a></b>]
21 [<b><a href="http://www.gentoo.org/proj/en/glep/glep-0019.txt">GLEP Source</a></b>]
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26 <tbody valign="top">
27 <tr class="field"><th class="field-name">GLEP:</th><td class="field-body">19</td>
28 </tr>
29 <tr class="field"><th class="field-name">Title:</th><td class="field-body">Gentoo Stable Portage Tree</td>
30 </tr>
31 <tr class="field"><th class="field-name">Version:</th><td class="field-body">1.8</td>
32 </tr>
33 <tr class="field"><th class="field-name">Last-Modified:</th><td class="field-body"><a class="reference" href="http://www.gentoo.org/cgi-bin/viewcvs.cgi/xml/htdocs/proj/en/glep/glep-0019.txt?cvsroot=gentoo">2006/10/10 16:54:34</a></td>
34 </tr>
35 <tr class="field"><th class="field-name">Author:</th><td class="field-body">Kurt Lieber &lt;klieber&#32;&#97;t&#32;gentoo.org&gt;</td>
36 </tr>
37 <tr class="field"><th class="field-name">Status:</th><td class="field-body">Withdrawn</td>
38 </tr>
39 <tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td>
40 </tr>
41 <tr class="field"><th class="field-name">Content-Type:</th><td class="field-body"><a class="reference" href="glep-0002.html">text/x-rst</a></td>
42 </tr>
43 <tr class="field"><th class="field-name">Created:</th><td class="field-body">26-Jan-2004</td>
44 </tr>
45 <tr class="field"><th class="field-name">Post-History:</th><td class="field-body">29-Jan-2004 2-Nov-2004 7-Dec-2004 10-Oct-2006</td>
46 </tr>
47 </tbody>
48 </table>
49 <hr />
50 <div class="contents topic">
51 <p class="topic-title first"><a id="contents" name="contents">Contents</a></p>
52 <ul class="simple">
53 <li><a class="reference" href="#status" id="id3" name="id3">Status</a></li>
54 <li><a class="reference" href="#abstract" id="id4" name="id4">Abstract</a></li>
55 <li><a class="reference" href="#id1" id="id5" name="id5">Status</a></li>
56 <li><a class="reference" href="#motivation" id="id6" name="id6">Motivation</a></li>
57 <li><a class="reference" href="#specification" id="id7" name="id7">Specification</a></li>
58 <li><a class="reference" href="#rationale" id="id8" name="id8">Rationale</a></li>
59 <li><a class="reference" href="#implementation" id="id9" name="id9">Implementation</a></li>
60 <li><a class="reference" href="#backwards-compatibility" id="id10" name="id10">Backwards Compatibility</a></li>
61 <li><a class="reference" href="#copyright" id="id11" name="id11">Copyright</a></li>
62 </ul>
63 </div>
64 <div class="section">
65 <h1><a class="toc-backref" href="#id3" id="status" name="status">Status</a></h1>
66 <p>Withdrawn by the author. &quot;If someone wants to take up the torch, more
67 power to them, but they should probably start clean with a new glep.&quot;</p>
68 </div>
69 <div class="section">
70 <h1><a class="toc-backref" href="#id4" id="abstract" name="abstract">Abstract</a></h1>
71 <p>This GLEP is intended to propose a series of changes to the Portage tree that
72 are necessary to facilitate the use of Gentoo in areas where stability and
73 predictability are of paramount importance, including servers in enterprise
74 environments, mission critical workstations and other such installations.</p>
75 <p>The proposed solution involves creating a separate tree in Portage that is
76 updated far less often than the regular tree. Outside of periodic updates,
77 this tree would only be updated with critical bugfixes and security patches.</p>
78 </div>
79 <div class="section">
80 <h1><a class="toc-backref" href="#id5" id="id1" name="id1">Status</a></h1>
81 <p>Currently recruiting people who would be willing to help with this GLEP.</p>
82 </div>
83 <div class="section">
84 <h1><a class="toc-backref" href="#id6" id="motivation" name="motivation">Motivation</a></h1>
85 <p>Enterprise users typically value stability and a predictable upgrade path
86 over having the latest packages or features available to them. Historically,
87 Gentoo Linux has been unable to provide such an environment due to the dynamic
88 nature of the Portage tree.</p>
89 </div>
90 <div class="section">
91 <h1><a class="toc-backref" href="#id7" id="specification" name="specification">Specification</a></h1>
92 <p>The Gentoo Infrastructure team will need to provide an additional Portage tree
93 on our rsync mirroring system. This new tree will house the ebuilds
94 associated with the stable tree. It also impacts all Gentoo developers
95 responsible for creating and updating ebuilds as they will be expected to
96 integrate the tagging of ebuilds for the stable tree into their normal
97 development process, both for the quarterly release cycles as well as
98 off-cycle bug and security fixes.</p>
99 <p>The Gentoo Documentation team will also be affected as they will be
100 responsible for updating installation documents to take these new features
101 into account.</p>
102 </div>
103 <div class="section">
104 <h1><a class="toc-backref" href="#id8" id="rationale" name="rationale">Rationale</a></h1>
105 <p>A basic outline of various ways of adding a &quot;stable&quot; tree to Portage was
106 discussed in the gentoo managers meeting on 26-Jan-04. Consensus seemed to be
107 reached that such a solution was needed and that branching the gentoo-x86
108 repository was the appropriate way to accomplish this. The largest area of
109 disagreement surrounded how specific ebuilds should be targeted for inclusion
110 in the stable tree.</p>
111 <p>One suggested solution was a simple branch of the CVS tree and having
112 developers work in two separate branches; one for the stable tree and
113 another for the traditional tree. However, it was felt this would prove too
114 cumbersome in practice.</p>
115 <p>Another suggestion was to have a small group of dedicated gentoo-server
116 developers responsible for generating the contents of the stable tree, which
117 would provide more control and quality assurance over the ebuilds added to the
118 stable tree. While this might prove effective for a small number of ebuilds,
119 it is quite likely that this model would not scale enough to allow for a large
120 number of ebuilds in the stable tree and, over time, the project would become
121 resource constrained and unable to meed future deadlines.</p>
122 <p>While the original draft of this GLEP called for the creation of a stable
123 keyword, we have since discarded that idea in favor of creating a custom
124 profile, which will be used to track a subset of packages and versions.</p>
125 </div>
126 <div class="section">
127 <h1><a class="toc-backref" href="#id9" id="implementation" name="implementation">Implementation</a></h1>
128 <p>This GLEP will create a new set of cascaded profiles (one per release, not to
129 exceed two per year) which will contain a subset of packages, including
130 versions. This profile will &quot;pin&quot; a Gentoo Linux box to a specific set of
131 packages and will only be updated for security updates and, in rare
132 circumstances, major bug fixes.</p>
133 <p>Because this profile will be cascaded, the option exists for other developers
134 to create their own profile, containing a subset of packages not found in the
135 &quot;main&quot; stable tree and include those as part of the overall stable profile.
136 These cases will be treated on a one-off basis.</p>
137 <p>The initial version will be x86 only, though other people will be encouraged
138 to provide separate stable profiles for other arches. It is expected that any
139 effort to provide a stable tree for any arch or flavor of Gentoo will follow
140 the basic outline of this GLEP to ensure consistency for our users.</p>
141 <p>In addition to a custom profile, this GLEP will also create a separate rsync
142 repository, &quot;gentoo-stable-portage&quot;, which will be available on all servers in
143 the rsync.gentoo.org rotation. This repository will be <em>identical</em> to the
144 main gentoo-portage repository except that the --delete flag will be removed
145 from the rsync option that populates the tree. This will ensure that users of
146 the stable profile will not have to worry about ebuilds for their packages
147 disappearing.</p>
148 <p>Stable profiles will be maintained on an N - 2 basis. That is to say that we
149 will maintain a stable profile for the most current release, plus the previous
150 two releases. With the expected release schedule for 2005, this will result
151 in each profile being supported for approximately 18 months. Future versions
152 of the stable portage tree may seek to increase the life of these profiles.</p>
153 </div>
154 <div class="section">
155 <h1><a class="toc-backref" href="#id10" id="backwards-compatibility" name="backwards-compatibility">Backwards Compatibility</a></h1>
156 <p>All features proposed here are new additions to existing processes and
157 features. There should be no impact on existing features and functionality.</p>
158 </div>
159 <div class="section">
160 <h1><a class="toc-backref" href="#id11" id="copyright" name="copyright">Copyright</a></h1>
161 <p>This document is licensed under the Creative Commons - Attribution / Share
162 Alike license. (<a class="reference" href="http://creativecommons.org/licenses/by-sa/1.0">http://creativecommons.org/licenses/by-sa/1.0</a>)</p>
163 </div>
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