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

sergio
Questions & Help>Questions

Updating a field using Ecto one-liner?
In Ruby, I can go: User.find_by(email: "foobar@email.com").update(email: "hello@email.com") How can I do something similar in Elixir? ...
15 14579 3
New
joaquinalcerro
Questions & Help>Questions

What is the best approach for fetching large amount of records from postgresql with ecto
Hi there, I am working with Ecto-Postgresql and I need to call all of the records from a specific table but the table has 40,000 record...
#ecto
126 24587 27
New
tduccuong
Questions & Help>Questions

Desktop GUI app with Elixir?
Hi, is there any work on GUI with Elixir, that is similar to Electron/Javascript? My idea is to bundle Phoenix and BEAM into a single se...
/phoenix#gui
34 13194 12
New
lk-geimfari
Questions & Help>Questions

The most correct way to read a JSON file
What is most correct way to open, read and parse JSON file with poison? For example if we have example.json file in root of some projec...
23 13679 2
New
vertexbuffer
Questions & Help>Questions

Deleting item from a list
Hello, can anybody help here..? I have a list of players and I what to delete an element, but every for loop the list is reverting to ori...
7 24097 4
New
aadeshere1
Questions & Help>Questions

Write while loop equivalent in elixir
I have a another noob question about loop. Since elixir is immutable, while loop is not directly possible. total = 10 while total != 0 ...
#while#loop
60 28200 36
New
ashish173
Questions & Help>Questions

Difference in between :utc_datetime and :naive_datetime in Ecto
I am using Ecto timestamps with postgres, I can see the timestamps() use the :naive_dateime but for my use case I wanted to store the ti...
#ecto#timestamps
79 27907 15
New
fireproofsocks
Questions & Help>Questions

Ecto delete a record WITHOUT selecting first
Forgive me if this is obvious, but how does one delete a database record WITHOUT selecting it first? https://hexdocs.pm/ecto/Ecto.Repo.h...
#ecto#optimization#delete-method
22 16810 8
New
chrisalley
Questions & Help>Questions

How to describe many contexts in ExUnit without a hierarchy
ExUnit now has describe blocks which is a welcome addition coming from RSpec. In the docs, it states that nested hierarchies of describe ...
#testing#exunit
66 16773 4
New
Exadra37
Questions & Help>Questions

It's possible to write a custom Guard to check for a blank string?
Sometimes I want to check if the input into a function is not a blank string. My first approach: defmodule Example do def do_stuff(s...
#guard-clauses#strings#guard#binary
20 14093 21
New

Other popular topics Top

joaquinalcerro
Questions & Help>Questions

What is the best approach for fetching large amount of records from postgresql with ecto
Hi there, I am working with Ecto-Postgresql and I need to call all of the records from a specific table but the table has 40,000 record...
#ecto
126 24587 27
New
sergio_101
Questions & Help>Questions

Pattern matching against a string
I am VERY much an elixir newbie. I have taken one elixir course and one phoenix course on Udemy. During that course, I saw the instructor...
#pattern-matching
27 26685 14
New
malloryerik
Learning Resources>Guides/Tuts/Tips/Info

How to use 'phoenix-heex' templates in VSCode
Hi, this is for people who, like me, have had some friction using .html.heex templates in VSCode. The solution seems to be, in a hyphena...
/phoenix#vscode#heex
118 16932 34
New
chrismccord
News>Phoenix News

Phoenix v1.5.0 released!
This release brings a number of exciting features, including integration with the new Phoenix LiveDashboard and Phoenix LiveView. There h...
/phoenix#phoenix-release
379 28447 94
New
freewebwithme
Questions & Help>Questions

Failed to run 'elixir' command error in vs code
Using vs code and installed ElixirLS: support and debugger. And I got an error popped up on start up says Failed to run ‘elixir’ comma...
#vscode#elixir-ls
48 15871 39
New
myronmarston
Questions & Help>Questions

Typespecs - best way to spec keyword lists?
The Elixir Typespec docs show the following syntax for keyword lists in typespecs: # ... | [key: type] # keyword lis...
#dialyzer
52 14258 3
New
minhajuddin
Questions & Help>Questions

Using List.first instead of Enum.at(0)
I have seen a lot of code which picks the first element from a list using Enum.at(0) instead of List.first. Is there a reason why people ...
#code-style
76 33273 14
New
msaraiva
Your Libraries & Projects>Libraries

Surface - A component-based library for Phoenix LiveView
Surface is an experimental library built on top of Phoenix LiveView and its new LiveComponent API that aims to provide a more declarative...
/phoenix#liveview#livecomponents#surface
564 42633 214
New
Fl4m3Ph03n1x
Questions & Help>Questions

Learning Elixir, frst impressions ( plz don't kill me ! )
About me? ( if you have nothing better to do than reading about some random guy in the internet :stuck_out_tongue: ) Hello all, this is ...
#learning-elixir
371 25801 61
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

ElixirCasts

Producing high quality Elixir screencasts since 2017.

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.

Manning

Develop your skills with books, videos, and courses.

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.

Manning

Develop your skills with books, videos, and courses.

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