Questions & Help>Questions

Need help: Super basic libcluster example using docker

/phoenix#docker#libcluster
polypush135

polypush135

Need help: Super basic libcluster example using docker

I’m trying to stand up a very basic example of distributed elixir using docker and epmd.

I chose to use libcluster and followed the readme with the example of the two nodes a@127.0.0.1 and b@127.0.0.1

Heres the app in github here https://github.com/joshchernoff/cluster_example

In short, everything works besides libcluster.
I can manually connect the nodes via Node.connect and list the nodes by hand but when running libcluster I get

docker
docker2530×922 257 KB

Any ideas?

If I had to guess I would think its related to something running too soon. IE maybe I need to wait to boot the other container first before the other? :man_shrugging:

I’m hoping I just overlooked something basic.

2 comments
/phoenix#docker#libcluster
3 1584 2

Marked As Solved

polypush135

polypush135

I was mistaken I can’t Node.connect by hand after all. I was connecting the node to the same app thus is was saying true, I didn’t notice I was giving the wrong node name to connect to. When trying to use the correct node name I found it would return false thus the prob here is likely epmd is not able to connect because of docker.

1
Post #3

Also Liked

Exadra37

Exadra37

See this other topic to see if addresses your issue:

2
Post #4

Where Next?

View thread on forum (has 2 responses!)
phoenix
docker
libcluster
Home Questions & Help>Questions
/phoenix#docker#libcluster
3 1585 2
Last post

Popular in Questions Top

JDanielMartinez
Questions & Help>Questions

** (RuntimeError) could not lookup Ecto repo Repo because it was not started or it does not exist
Hi! May someone helps me, please! I have two apps into an umbrella project: the first one is Database, which manages queries, and the se...
#umbrella#testing#repo#runtimeerror
11 15040 14
New
Brian
Questions & Help>Questions

Import a module from a file into IEX
What is the proper way to load a module from a file in to IEX? In the python world, doing something like this pretty standard: from ....
#iex
35 32139 16
New
vonH
Questions & Help>Questions

Why would I choose Elixir as a general purpose programming language?
In asking this question I am more interested about the expressiveness of the language itself and less concerned about the availability of...
#functional-programming#use-cases
65 34758 13
New
lessless
Questions & Help>Questions

How are you dealing with CSV files that uses CR line breaks?
I believe there are people here who are dealing with CSV files import on the daily basis, and since Excel is a really popular tool there ...
#how-to-question
10 18353 17
New
_russellb
Questions & Help>Questions

Web scraping tools
I want to try my hand at web scraping. What tools/libraries do I need to use. I’m hoping to turn this into something professional so don’...
#web-scraping
123 19127 45
New
Werner
Questions & Help>Questions

Mix local.hex warning - ‘Authenticity is not established by certificate path validation’
Hi, I’m using Ubuntu 18.04 and after updating to OTP-24.0 yesterday i have this warning when I run “mix local.hex”: 14:57:30.512 [warn] ...
#troubleshooting
47 14042 14
New
jononomo
Questions & Help>Questions

Where / How does the Mix environment variable get set?
I am trying to figure out how Mix knows whether the environment is test, dev, or prod -- where is this set? Thanks.
#mix
31 22791 9
New
Fl4m3Ph03n1x
Questions & Help>Questions

How to test a GenServer?
Background Let’s assume I have a typical GenServer that receives messages as requests, does some operation in a DB and returns responses....
#testing#actor-model
77 13824 19
New
lucidguppy
Questions & Help>Questions

How do I read a file and enumerate its lines
I have a super simple question about elixir - how would I take a file like this foo bar baz and output a new file that enumerates th...
#how-to-question
20 15454 3
New
vrod
Questions & Help>Questions

Starship (cross-shell prompt) error - (starship::utils): Executing command "elixir" timed out
I am using the Starship cross-shell prompt – it seems pretty nice, but I get some errors: [WARN] - (starship::utils): Executing command ...
#starship
8 17167 3
New

Other popular topics Top

Qqwy
Blogs & Podcasts>Blog Posts

Elixir Blog Posts
Update: How to use the Blogs & Podcasts section You can post links to your blog posts or podcasts either in one of the Official Blog...
hexdocs.pm
#blog-posts#wiki#stickies#official-blog-posts-thread
3268 119930 1237
New
JDanielMartinez
Questions & Help>Questions

** (RuntimeError) could not lookup Ecto repo Repo because it was not started or it does not exist
Hi! May someone helps me, please! I have two apps into an umbrella project: the first one is Database, which manages queries, and the se...
#umbrella#testing#repo#runtimeerror
11 15040 14
New
pmjoe
Questions & Help>Questions

What do you think of Gleam compared to Elixir?
I have a relationship of love and hate with Elixir. Lots of things are just absolutely right, but there are some things that are kind of ...
#programminguages#gleam
24 16555 10
New
axelson
Chat & Discussions>Wikis

Emacs - Elixir Setup Configuration Wiki
This post is a wiki (feel free to hit the edit button near the bottom right of this post to add your own changes!) This post collects co...
#spacemacs#wiki#emacs#code-editors#language-server-protocol
239 45766 226
New
polypush135
Questions & Help>Questions

Proper use of Task.async?
As many of you may have realized by now (sorry for all the posts here) I’ve been working on a db problem where I’m trying to aggregate a ...
#task
26 15568 8
New
script
Questions & Help>Questions

Removing spaces and characters from string
If I have a string “1000 cfu/ml” . I want to remove the characters and / and space . So the string is like this "1000" What is the ...
#regex
11 14427 2
New
shahryarjb
Questions & Help>Questions

How to convert map to string (separated with ,)
Hello, I have map which I want to convert it to string like this: the map: %{last_name: "tavakkoli", name: "shahryar"} the string I ne...
#maps#strings
15 15491 2
New
josevalim
Official Elixir>Proposals

Behaviours, defoverridable and implementations
Hi everyone, One of the features added to Elixir early on to help integration with Erlang code was the idea of overridable function defi...
#official-elixir-proposal
111 22687 35
New
Qqwy
Questions & Help>Questions

Updating structs: Map.put vs %Foo{oldfoo | new: value} vs put_in
Original source of discussion: This topic on the Pragmatic Programmers' Functional Web Development with Elixir, OTP, and Phoenix forum. ...
#maps#structs#pipeline#access
115 28410 31
New
vrod
Questions & Help>Questions

Starship (cross-shell prompt) error - (starship::utils): Executing command "elixir" timed out
I am using the Starship cross-shell prompt – it seems pretty nice, but I get some errors: [WARN] - (starship::utils): Executing command ...
#starship
8 17167 3
New
Back to top

Latest Phoenix Threads

Phoenix Forum ❯

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Manning

Develop your skills with books, videos, and courses.

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

WyewWorks

Enabling companies to succeed by building software people love.

Potions

The deployment platform built for Elixir: PaaS ease, VPS control.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

WyewWorks

Enabling companies to succeed by building software people love.

Potions

The deployment platform built for Elixir: PaaS ease, VPS control.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement