I am installing openstack on a new server using devstack. I am having this error no matter the type of installation i do. I am installing on the host computer. I tried the exact same installation on another computer and it's fine and the openstack is working, however i kept on having this error on this cpu. I even formatted the computer and reinstalled the ubuntu 16 and 18 and, but whenever i tried to install openstack i kept on having this error. I haven't seen this type of error before and I don't know why the error is there, is it from the OS, the CPU or openstack. I tried different branches, rocky, stein, train or queens. its always the same. I tried this installation on another computer and it worked fine
The world dump file can be found here enter link description here
It's pretty tricky, I guess i used the same wifi adapter with my previous openstack cpu, so the ip address are the same. However i changed the password, so, openstack feels like the account for the ip address exist but the password is different. so it couldn't authenticate some keystone commands and it's failing.
So here is how is discovered the problem, i tested the installation with a static ip, via an ethernet cable, and i discovered the error wasn't there. Then i realized that the host IP address that is used in this server is the same as the previous server. Interesting, So I connected back to the wifi adapter, the same IP address, and i used the same password as the previous cpu. and it worked fine, Installation went through ... Lol, i battled this for more than 3 days, very tricky.
Related
This is my first attempt at deploying a Node.js application on a Google VM instance while connecting to MongoDB.
In MongoDB, I have whitelisted my IP address and the VM instance's IP address. When I start my server using Google Cloud Shell, I receive the following error:
op.cb(new error_1.MongoNetworkError(`connection ${this.id} to ${this.address} closed`));
^
MongoNetworkError: connection 1 to 34.71.95.215:27017 closed
I'm connecting on port 8080. The external IP is listed on my GCP instance page and when I ping it, it is up. IP: 34.68.254.120
When I whitelist 0.0.0.0/0 in Mongodb, the code runs successfully, and I can preview my app through GCP.
I created a new instance from scratch, and it also crashes with the same error.
ETA: In looking at the source code around the error message at:
...\node_modules\mongoose\node_modules\mongodb\lib\cmap\connection.js
it looks like a closed connection. The error message above spits out the IP address as the Iowa Google Data Center where my VM is housed.
I don't know what this means, but if you do, please let me know.
ETA2: I have 2 problems, and they may be connected. The first is that my VM server cannot connect to MongoDB. This should be simple -- whitelist the external IP address of my VM server. It does not work (I have to open MongoDB to 0.0.0.0/0 for it to connect).
The second is that I cannot connect to my server via the external IP address, regardless of whether MongoDB is connected or not. It "refuses to connect." I can do a web preview of my running server, though.
It seems the two may be connected somehow. I've rebooted my VM, but it did not fix anything. I whitelisted the error message IP address in MongoDB, but it did not help.
ETA3: Okay, it appears I have solved the whitelist to MongoDB issues. Through Cloud Shell, I asked my VM what the IP is. It is different than the one GCP tells me is the external IP. By adding this IP to the whitelist, I can connect between GCP VM and MongoDB. Whew. No idea why.
The VM's external IP address through my browser still gives me a cannot connect message, and when I use the new VM IP address I found through Cloud Shell, it gives me a "took too long to respond" message.
So I feel I have made progress. The remaining problem is accessing my server through Chrome.
Any suggestions on how I can investigate the issue further? I'm at a dead end. I believe the problem is likely simple given my inexperience.
Thanks!
Problem solved by a friend, for anyone in the future with this issue.
I had set up my GCP VM using Cloud Shell. I had housed my code by coping my repository through Cloud Shell. It turns out, this is more of a virtual interface with my VM, and the files are not physically on my VM. I needed to go through SSH, clone my repository there, and run my server through SSH. Cloud Shell was causing the problem.
I use a local Python web server on my Windows machine. It’s simple, but good enough while in the static web page development stage. I just run it with something like this on my WSL command line:
python3 -m http.server
I can also access it on mobile devices on the same network, by going to my local address, e.g.: http://192.168.1.12:8000. All was good, until suddenly I could no longer access it on external devices, I got a “server not responding” type of message. Also, I could clearly see that when I refreshed the page on my phone, there was no GET request on the logs.
Immediately I tested on the local machine, and it was still working fine. This obviously smelled like a Firewall. In Linux, I’d know what to do, but it’s the first time I had to deal with this on Windows. This is what I’ve tried, without resolving the connection problem:
I opened the Event Viewer but could not see any obvious logs to check
I stopped the server (CTRL+C) and started it again on another port (5000). The Windows Firewall message popped up again asking for permission for Python3 to access the “Public network” and the “Private network”. Normally I just tick the “private network” but this time I checked both, as a troubleshooting step, in case my Wi-Fi was incorrectly being considered “public”.
I went to Windows Firewall and temporarily shut it down on the private network.
I installed and tried running nmap on the WSL, but it failed to run and prompted me to install the Windows version instead.
I installed and ran the Windows version of nmap but it told me that port 5000 was open.
What is the recommended way to troubleshoot and fix this issue?
Still suspecting the firewall, I tried something new, I switched off the “public network” firewall. I tested on my mobile and the page loaded as normal again! I immediately turned the firewall back on. Tested the page on my mobile once more, still fine. So, the solution was to toggle the public network firewall. I would make it more generic and toggle all firewall categories on Windows. And of course, I would make sure that the firewall stays on, this was a very quick operation.
I thought I’d put this here rather than ServerFault or SuperUser as it could potentially be more useful to developers, and it took a precious hour of my time. I still don’t know why it stopped working on its own in the first place. Better troubleshooting steps or suggestions are welcome, but I probably won’t be able to verify it as I don’t know how to purposely induce the issue.
Another solution that worked another time, was to delete all instances of Python 3.8 from the list of allowed apps (I don't know why Windows shows the same app multiple times) then (re)start the Python server and allow it through when the Firewall question pops up again.
In windows firewall you may have 4 options to configure your local web server when you are creating new Inbound connections rule.
1 Program
2 Port
3 Predefined
4 Custom
Try to use port only in "TCP protocol" and the custom port.
Allow connection.
Select: all checks: domain, private and public.
Enter a name.
Thats all.
I wanna use oVirt engine 3.6 in my Internet connectionless network. I installed oVirt with yum over internet. After that I tried to work offline. When I go offline Web Interface it still works fine. But I connected it to my local netowork Interface starts not to respond. I check POST/GET requests that made by it and I see it stuck on request/respond to/from GenericApiGWTService. For example, normally time between request and respond takes 1 to 600ms but when I connect it to local network it take up to 300.000ms second and eventually it fails. I use CentOS 7 x86_64. I couldn't figure out what is it cause to that.
I fix the problem by;
Use another IP from different address group then the one you use for
internet connection. Example: I used 192.168.1.10 for internet
connection. When I connect pc to local I changed it to 192.168.2.10
Delete all Gateway and DNS IPs.
Then it works fine.
On beforehand I have to say i'm a bit of a newbie.
I've sucscribed to a VPS with Ubuntu 11.04 server, I installed Jboss and am starting it with the -b 0.0.0.0 option.
Now if I lookup the address ip:8080 on a browser on the VPS itself it's working fine, but if I try to look it up on a browser on an external machine it isn't able to access the page.
I tried to modify the hosts file but without success. Maybe its the iptables? Or something else?
I really appreciate any help thanks.
Take the static IP of the server, ping that from your command line tool with ping. If you are successful in pinging the server you are all set. Now go to the browser of the external pc and type the static ip and give the port as 8080. It will certainly work.
Some good suggestion from my side is, try PaaS(platform as a service) now as that is much easier than VPS and you will get up and running in minutes. Try Jelastic. It has got JBoss hosting. Deploy your WAR file there and you can access it immediately. Ket me know if you really go ahead and use it.
Surya
I have a mac running Lion OS, and Windows 7 Ultimate installed on VMware Fusion
on my Windows machine, I have IIS running and I can access it from my mac browser using the IP address such as:
http://192.168.0.10
I am developing an iPhone app on xcode and connecting to IIS as a server to access MS Server DB for testing.
my problem is that I use my mac on many networks such as Work, Home, MiFi and others
every time I change the network the IP changes and every time I need to access IIS I need to update my server IP in my app.
even on my home netwrok or MiFi the IP is the same every time I connect (Dynamic)
I am thinking to access the IIS using the PC name on my windows 7 machine like this:
http://mypcname
to make easier to test without editing the IP every time.
Can anyone guide me how to do that? I did search around many sites and forums to figure it out with no success, maybe I am missing something.
Thanks in advance.