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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Jeffrey,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">The kolla-kubernetes deliverable requires COPY_ONCE not COPY_ALWAYS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Some operators prefer immutability over hand-modification of configuration files on all nodes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Therefore, I propose we keep both in place.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">-steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Jeffrey Zhang <zhang.lei.fly@gmail.com><br>
<b>Reply-To: </b>"OpenStack Development Mailing List (not for usage questions)" <openstack-dev@lists.openstack.org><br>
<b>Date: </b>Wednesday, November 30, 2016 at 7:27 PM<br>
<b>To: </b>OpenStack Development Mailing List <openstack-dev@lists.openstack.org><br>
<b>Subject: </b>[openstack-dev] [kolla] propose to remove COPY_ONCE feature<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">Kolla has a config_strategy option during deployment. it supports COPY_ONCE and</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">COPY_ALWAYS. which means whether copy the configuration files defined in</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">config.json again during starting containers.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">COPY_ALWAYS: copy all configuration files always during every start ( default</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif""> value now )</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">COPY_ONCE: copy only once for the first start, then it</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif""> won't copy even the configuration is changed</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">COPY_ALWAYS is more common for most users. change configuration, then restart</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">containers and it works. but COPY_ONCE is not. after changing the configuration,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">should remove the container and start it again.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">for COPY_ONCE, the pro is keeping immutability of the container. the con is</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">making thing difficult. no matter for kolla code or end-user. </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">I am curiosity does end-user really care about the immutability cause by</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">configuration file? how many user really need such a feature?</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">So I propose to remove COPY_ONCE.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"monospace","serif"">any idea is welcome ;)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Courier"><o:p> </o:p></span></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"monospace","serif"">Regards,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"monospace","serif"">Jeffrey Zhang</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Courier">Blog: </span><a href="http://xcodest.me/"><span style="font-size:9.5pt;font-family:Courier">http://xcodest.me</span></a><o:p></o:p></p>
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