<div dir="ltr"><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-indent:36pt;text-align:justify" id="docs-internal-guid-38f02ca7-a0f5-0f6c-a15f-7d9602868b1e"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Hello, Stackers.</span></p>
<br><br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-indent:36pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">I’d like to propose policy for configuration option deprecation taking into account all requirements related to production deployment. <br>
</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-indent:36pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">As you all know, there are a lot patches that are proposing modifications to existing configuration. And options are being modified without any(not always) documentation that reflects differences behaviour with old and new options.</span></p>
<br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">    </span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">What we’re doing right now doesn’t seems to be the most valid way, we shouldn’t delete options without any signs (DocImpact section, at least). </span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-indent:36pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">We should find more appropriate way to handle such cases, the most appropriate way to handle given case is to use oslo-config abilities - mark option as “Deprecated”.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-indent:36pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Here’s proposed workflow for modifications. Once option is being modified:</span></p>
<ol style="margin-top:0pt;margin-bottom:0pt"><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Leave option that is going to be modified as is, add Deprecated flag. Clean-up code from usage from deprecated option.</span></p>
</li><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Add new option. Add usage to existing code as substitution to previous option.</span></p>
</li><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Add documentation that reflects differences between options: new and deprecated one.</span></p>
</li><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Add documentation that reflects behaviour  of existing code with new option.</span></p>
</li></ol><br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Thoughts?</span></p>
<br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Best regards,</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;text-align:justify"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Denis Makogon</span></p>
<br></div>