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<div class="elementToProof"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Kolla only uses a single controller if you use file based backend by default. If you want
to continue using the file backend, you can use something like an NFS share to share images between controllers and then change the <span class="pl-s ContentPasted0">glance_file_datadir_volume parameter which will result in the api being deployed on all controllers</span></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> pradeep <pradeep8985@gmail.com><br>
<b>Sent:</b> 12 December 2022 04:53<br>
<b>To:</b> Dmitriy Rabotyagov <noonedeadpunk@gmail.com><br>
<b>Cc:</b> openstack-discuss <openstack-discuss@lists.openstack.org><br>
<b>Subject:</b> Re: auto switch of glance-api containers to other controllers</font>
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Any help is highly appreciated.
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<div>Thank you!</div>
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<div dir="ltr" class="x_gmail_attr">On Fri, 9 Dec 2022 at 21:46, pradeep <<a href="mailto:pradeep8985@gmail.com">pradeep8985@gmail.com</a>> wrote:<br>
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<div dir="ltr">Hi Dmitriy, Thanks for the response. Sorry, I forgot to mention that i used kolla ansible for deployment. As per kolla docs, glance-api container runs only in one controller. So i am looking from kolla perspective if it can automatically switch it
over other available controllers.
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<div>Regards</div>
<div>Pradeep</div>
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<div dir="ltr" class="x_gmail_attr">On Fri, 9 Dec 2022 at 14:51, Dmitriy Rabotyagov <<a href="mailto:noonedeadpunk@gmail.com" target="_blank">noonedeadpunk@gmail.com</a>> wrote:<br>
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<div>Hi,
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<div dir="auto">I'm not sure if you used any deployment tool for your environment, but usually for such failover there's a load balancer in conjunction with VRRP or Anycast, that able to detect when controller1 is down and forward traffic to another controller.</div>
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<div dir="auto">As example, OpenStack-Ansible as default option installs haproxy to each controller and keepalived to implement VRRP and Virtual IPs. So when glance is down on controller1, haproxy will detect that and forward traffic to other controllers. If
controller1 is down as a whole, keepalived will detect that and raise VIP on controller2, so all client traffic will go there. Since controller2 also have haproxy, it will pass traffic to available backends based on the source IP.</div>
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<div dir="ltr" class="x_gmail_attr">ΠΤ, 9 ΔΕΛ. 2022 Η., 09:06 pradeep <<a href="mailto:pradeep8985@gmail.com" target="_blank">pradeep8985@gmail.com</a>>:<br>
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<div dir="ltr">Hello All,
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<div>I understand that glance-api container run only one controller always. I have tried to check if the glance-api container to switch over to the next available controller by means of rebooting and stopping the containers, but nothing happened. Is there a
way to make sure that glance-api container switches to other controllers if controller 1 is not available.</div>
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<div>Thanks for you help</div>
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<div>Regards</div>
<div>Pradeep<br clear="all">
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<span style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">Regards</span><br style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">
<span style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">Pradeep Kumar</span><br style="font-family:"comic sans ms",sans-serif; color:rgb(51,51,51)">
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<span style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">Regards</span><br style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">
<span style="color:rgb(51,51,51); font-family:"comic sans ms",sans-serif">Pradeep Kumar</span><br style="font-family:"comic sans ms",sans-serif; color:rgb(51,51,51)">
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<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Danny Webb</span>
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<span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">Principal OpenStack Engineer</span><br>
<span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#019EEB"><a href="http://www.thehutgroup.com/" target="_blank"><span style="color:#575a5d;
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<a href="mailto:Danny.Webb@thehutgroup.com">Danny.Webb@thehutgroup.com</a></span></p>
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