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<p>Devstack is not meant to be restarted. However, setting the IP
address on br-ex and bringing it up is normally sufficient to
re-establish networking. After that, you probably still need to
recreate the loop devices for Cinder and Swift.<br>
</p>
<p>What I don't understand: The external network that Devstack sets
up by default, named "public", is fake. It's not external, and
it's not connected to the outside world at all, thus the IP
address range of 172.24.4.0/24. How your instances were able to
access the internet without any manual tweaking is a mystery to
me. If you did some manual tweaking, I guess it was lost when you
rebooted.</p>
<p>Perhaps you had a non-persistent routing table entry that
connected 172.24.4.0/24 to the outside world? <br>
</p>
<p>Bernd.<br>
</p>
<div class="moz-cite-prefix">On 8/22/2020 10:24 AM, 李志远 wrote:<br>
</div>
<blockquote type="cite"
cite="mid:tencent_E51A98659906550A5DD44A8CCB76E8937606@qq.com">
<div style="color: rgb(0, 0, 0); font-family: "lucida
Grande",Verdana,"Microsoft YaHei";
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">I'm sorry to disturb
you. </div>
<div style="color: rgb(0, 0, 0); font-family: "lucida
Grande",Verdana,"Microsoft YaHei";
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">Recently, I tried to
install openstack through devstack. When I input "./stack.sh". I
can install openstack successfully. </div>
<div style="color: rgb(0, 0, 0); font-family: "lucida
Grande",Verdana,"Microsoft YaHei";
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">Then I tried to create
a cloud instance and use the public network <a style="color:
rgb(50, 56, 78); cursor: pointer; outline-color: invert;
outline-style: none; outline-width: medium; text-decoration:
underline;" href="http://172.24.4.0/24" target="_blank"
rel="noopener" moz-do-not-send="true">172.24.4.0/24</a> which
is created during installation( this subnet is created by
default, I didn't configure network informartion in local.conf
before installation). And the instance can access to the
Internet smoothly.</div>
<div style="color: rgb(0, 0, 0); font-family: "lucida
Grande",Verdana,"Microsoft YaHei";
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">But the instance will
not access the Internet when I reboot my server (physical
machine). After rebooting, I input "sudo ifconfig br-ex <a
style="color: rgb(50, 56, 78); cursor: pointer; outline-color:
invert; outline-style: none; outline-width: medium;
text-decoration: underline;" href="http://172.24.4.1/24"
target="_blank" rel="noopener" moz-do-not-send="true">172.24.4.1/24</a>
up", the instance can access my server IP, but it can't PING the
gateway addresses of my server. Of course, the instance also
can't access the Internet. But my server can PING it's gateway
and access to the Internet. Finally, the cloud instance can only
communicate with my server.</div>
<div style="color: rgb(0, 0, 0); font-family: "lucida
Grande",Verdana,"Microsoft YaHei";
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">I tried many methods to
restore the network environment of my openstack. But I can't
find the reason. <span style="background-color: rgb(255, 255,
255); color: rgb(0, 0, 0); display: inline; float: none;
font-size: 14px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; text-align: left;
text-decoration: none; text-indent: 0px; text-transform: none;
white-space: normal; word-spacing: 0px;">So I need your help.
I install the version of devstack is stable/train. Thank you
very much!</span></div>
</blockquote>
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