Please consider this matter closed (at least for me).
We ended up replacing our the HP DL180 gen 6 controller/Fuel servers with Dell r610s and the problem is now non-existent.
I'm not sure what the problem was related to however I can tell you I've received that same 'nailgun server not available' error in the Fuel UI a few times when attempting to save things to many nodes at once within our working MOS 9.2 install using Dell R610s. Reducing the number of nodes I'm modifying the config for or simply trying again works around the rare issue now.
I appreciate your help! On 04/05/2017 02:35 PM, Evgeniy L wrote:
Given the fact that you can see settings tab with parameters, the error "Nailgun server is unavailable. Please check your connection and contact your system administrator." most likely means that Nailgun responded with 5xx error, which may happen because of some unhandled exception. 1. We need to confirm that the problem is indeed in unhandled exception. In "/var/log/nailgun/api.log" you should see an api request from your browser and corresponding response code. 2. Without python traceback/logs it's hard to say what went wrong, as far as I remember python traceback will be in "/var/log/nailgun/api.log" file alongside with a request from your browser. Thanks, On Wed, Apr 5, 2017 at 9:29 AM, sil...@gmail.com <mailto:sil...@gmail.com> <sil...@gmail.com <mailto:sil...@gmail.com>> wrote: When I attempt to save any changes to a cloud environment I've created, such as within 'Setting' changing 'Hypervisor type' in the 'Compute' setting menu from 'QEMU' to 'KVM', the save button circles for about 7-8secs and then a pop-up dialog box comes up that says: OpenStack Settings Configuration Error Nailgun server is unavailable. Please check your connection and contact your system administrator. This happens while trying to use any version of Fuel greater than 9.0 on a HP DL180 gen6 server (I also tried version 11 with the same results). I can use any version of Fuel without problems using identical settings on a Dell r610 server. I checked all of the logs in /var/log/nailgun and none of them indicate any errors that I can see. There are also plenty of nailgun related processes running on the Fuel server. On 04/05/2017 10:14 AM, Evgeniy L wrote: Hi, Could you please clarify, do you receive this error in the UI? What do you mean by "save any changes"? I'm not sure if ranges can cause such behavior, please see logs "/var/log/nailgun/app.log" and "/var/log/nailgun/api.log" for any errors/python tracebacks. Thanks, On Mon, Apr 3, 2017 at 8:12 PM, sil...@gmail.com <mailto:sil...@gmail.com> <mailto:sil...@gmail.com <mailto:sil...@gmail.com>> <sil...@gmail.com <mailto:sil...@gmail.com> <mailto:sil...@gmail.com <mailto:sil...@gmail.com>>> wrote: Has anyone had a problem with Mirantis Fuel giving a 'nailgund not available' error when attempting to save any changes to a cloud environment? I'm encountering this problem after a fresh install of Mirantis Fuel 9.0 and then immediately upgrading to 9.2 (didn't even login to the Fuel web interface prior to the upgrade). I've verified that nailgund is running and the network configured in 'fuelmenu' during the initial 9.0 install is legit with Internet connectivity (172.16.0.0/22 <http://172.16.0.0/22> <http://172.16.0.0/22> network, 172.16.3.250 is fuel server, 172.16.0.1 is the Internet gateway and 172.16.1.1-172.16.2.254 is handed out via the fuel DHCP server). I've also verified that no other DHCP servers exist on this network, no errors or warnings in the 'fuelmenu' portion of the installation. I've installed this before using the same exact methods/options on some Dell hardware in a lab of mine however I'm having this problem on a production deployment using some older HP servers. The only difference between the functional installation and this one is the IP ranges that were used and I set a root/admin password on the production setup (I left admin/root at default on the functional setup). I have a suspicion that using the 172.16.0.0/22 <http://172.16.0.0/22> <http://172.16.0.0/22> network as the admin/PXE network for fuel deployments might be the culprit as I noticed that the nailgund config file defines '172.16.0.0/16 <http://172.16.0.0/16> <http://172.16.0.0/16>' as 'PUBLIC' in the template section as shown below: /etc/nailgun/settings.yaml " STATIC_DIR: "/usr/share/nailgun/static" TEMPLATE_DIR: "/usr/share/nailgun/static" NETWORK_POOLS: public: - "172.16.0.0/16 <http://172.16.0.0/16> <http://172.16.0.0/16>" private10: - "10.0.0.0/8 <http://10.0.0.0/8> <http://10.0.0.0/8>" private192: - "192.168.0.0/16 <http://192.168.0.0/16> <http://192.168.0.0/16>" NET_EXCLUDE: - "172.16.0.0/22 <http://172.16.0.0/22> <http://172.16.0.0/22>" ADMIN_NETWORK: cidr: "172.16.0.0/22 <http://172.16.0.0/22> <http://172.16.0.0/22>" netmask: "255.255.252.0" mac: "e4:11:5b:e6:90:3a" size: "1024" first: "172.16.1.1" last: "172.16.2.254" gateway: "172.16.3.250" VLANS_RANGE_START: "100" VLANS_RANGE_END: "1000" " I tried using Mirantis Fuel 9.0 without patching and it doesn't exhibit this same problem although this time around I left the admin/root passwords at default and did not set them as I did with the previous installations when I upgraded directly to 9.2 so I'm not sure if that is factoring in here. Any ideas what the issue may be? Also, sorry if this is a repost, I sent this email many hours ago and didn't see it appear on the mailing list archives, not sure what the issue is or if I didn't wait long enough. silox _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack>> Post to : openstack@lists.openstack.org <mailto:openstack@lists.openstack.org> <mailto:openstack@lists.openstack.org <mailto:openstack@lists.openstack.org>> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack>>
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