For future reference (but not yet directly relevant for Andy's use case): If you run AWS EC2 instances behind an Elastic Load Balancer, you also need to add the EC2 instance's private IP (and potentially its public hostname) to the ALLOWED_HOSTS setting. This is because the load balancer uses the private IP to address your EC2 instances for health checks, instead of the hostname you chose.
Here is how to do that. Simply add this to your settings.py: # Fix for AWS ELB returning false bad health: ELB contacts EC2 instances through their private ip. # An AWS service is called to get this private IP of the current EC2 node. Then the IP is added to ALLOWS_HOSTS so that Django answers to it. EC2_PRIVATE_IP = None try: EC2_PRIVATE_IP = requests.get( 'http://169.254.169.254/latest/meta-data/local-ipv4', timeout=0.01).text except requests.exceptions.RequestException: pass if EC2_PRIVATE_IP: ALLOWED_HOSTS.append(EC2_PRIVATE_IP) EC2_PUBLIC_HOSTNAME = None try: EC2_PUBLIC_HOSTNAME = requests.get( 'http://169.254.169.254/latest/meta-data/public-hostname', timeout=0.01 ).text except requests.exceptions.RequestException: pass if EC2_PUBLIC_HOSTNAME: ALLOWED_HOSTS.append(EC2_PUBLIC_HOSTNAME) On Wednesday, 8 November 2017 12:42:58 UTC-5, Adam Cox wrote: > > Hey Andy, that's great, glad to hear it's working well. Good note about > the Projects folder too. It is a small detail, but could trip someone up > for a minute if they are looking for an exact replica of the installation > instructions. > > Adam > > On Wed, Nov 8, 2017 at 10:53 AM, Andy Graham <[email protected] > <javascript:>> wrote: > >> Thanks much Adam, very helpful. >> >> The AMI worked great and didn't have any issues once I updated. Only >> thing I would point out is that the AMI doesn't nest the arches and ENV >> folder in a Projects folder as recommended in the installation >> instructions. Not that big of a deal, just thought I would point it out. >> Once again, thanks for the help. >> >> Andy >> >> On Tuesday, November 7, 2017 at 4:26:38 PM UTC-8, Adam Cox wrote: >>> >>> Hey Andy, great question. ALLOWED_HOSTS is actually a variable that you >>> can define in your settings.py or settings_local.py file. It should be a >>> list, so something like >>> >>> ALLOWED_HOSTS = ["12.34.56.78","arches4.andygraham.com"] >>> >>> would be a valid entry. You can also use ["*"] to allow all hosts. Not >>> recommended for production of course, but could get past a the problem in a >>> pinch if you ip or domain is changing a lot... >>> >>> I am glad to hear you were able to use that AMI. I made it a while ago, >>> so it could probably stand some updates. Let me know if you find any >>> problems with dependencies and such. >>> >>> Adam >>> >>> On Nov 7, 2017 4:53 PM, "Andy Graham" <[email protected]> wrote: >>> >>>> Attempted to install Arch V4 to test out some of the features. Set up >>>> an instance on AWS, downloaded the Arches 4 community instance that I >>>> think >>>> Adam put up there a while ago. Once that was set up I went through and >>>> and >>>> followed the Developer Installation instruction to make sure everything >>>> was >>>> up to date and set up correctly. I then ran the runsever command, went to >>>> the website (public IP:8000) and got an error page that said >>>> "DisallowedHost at / Invalid HTTP_HOST header: 'xx.xx.xx.xx.:8000'. You >>>> may need to add u'xx.xx.xx.xx' to ALLOWED_HOSTS.", with the xx as my >>>> public >>>> IP. Based on additional information I went to the request.py file in >>>> ENV/lib/python2.7/site-packages/django/http and edited the "allowed_hosts" >>>> on line 102 to include my IP. Everything worked fine after that but I am >>>> guessing that this isn't standard protocol. Any suggestions on what I did >>>> wrong and how to fix it so I don't have to add that info when spin up >>>> another instance? Thanks. >>>> >>>> Andy >>>> >>>> -- >>>> -- To post, send email to [email protected]. To unsubscribe, >>>> send email to [email protected]. For more information, >>>> visit https://groups.google.com/d/forum/archesproject?hl=en >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Arches Project" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >> -- To post, send email to [email protected] <javascript:>. To >> unsubscribe, send email to [email protected] <javascript:>. >> For more information, visit >> https://groups.google.com/d/forum/archesproject?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Arches Project" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- -- To post, send email to [email protected]. To unsubscribe, send email to [email protected]. For more information, visit https://groups.google.com/d/forum/archesproject?hl=en --- You received this message because you are subscribed to the Google Groups "Arches Project" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
