By delpeter
Hi,
I have created a Docker Swarm (private network) - complete with H/A & Im at the stage of setting up TLS…however the nodes must recognise each other from hostname and not ipaddress.
When I try to ping either of the 7 nodes within the private network using the hostname, it does not work, however I can ping with the private ip address.
I did try to set up a DNS - however this did not resolve my issue.
Thank you and look forward to any suggestions that may lead me to a solution.
Del
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What about using hosts file?
hosts will allow you to resolve host names to IP addresses.
Open hosts file with text editor of your choice:
- sudo nano /etc/hosts
There will probably be already some lines it. Add new line for example:
...
111.111.111.111 sammy2
Now if you ping sammy2 it should ping 111.111.111.111. If nothing happens try restarting your Droplet, but this should not be a case.
@sierracircle this is definitely the easiest/dirtiest solution. Problem is that propagation could take a while. New deployments and changes could take a while. But all the other options look exceedingly difficult for a small shop to implement. I may do this option and see how well I like it.
Hi,
Super suggestion, however, this was tried and failed also for me. I navigated to the sudo vim /etc/hosts file on one of my droplets and added all other 6 nodes in my swarm cluster (within the private network) and pinged the hostname associated with the node with no sucess, but all pings were successful when I pinged the actually address’s…
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