Can't test with rspec and elasticsearch-extensions on Ubuntu - ruby-on-rails

Question

I've followed this guide to run integration tests in rspec with the elasticsearch-extensions gem, but at the moment I run Elasticsearch::Extensions::Test::Cluster.start(port: 9250, nodes: 1, timeout: 120), the following error is thrown:
Starting 2 Elasticsearch nodes...Exception in thread "main" ElasticsearchException[Failed to load logging configuration]; nested: NoSuchFileException[/usr/share/elasticsearch/config];
Likely root cause: java.nio.file.NoSuchFileException: /usr/share/elasticsearch/config
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
at sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:144)
at sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99)
at java.nio.file.Files.readAttributes(Files.java:1737)
at java.nio.file.FileTreeWalker.getAttributes(FileTreeWalker.java:225)
at java.nio.file.FileTreeWalker.visit(FileTreeWalker.java:276)
at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:322)
at java.nio.file.Files.walkFileTree(Files.java:2662)
at org.elasticsearch.common.logging.log4j.LogConfigurator.resolveConfig(LogConfigurator.java:142)
at org.elasticsearch.common.logging.log4j.LogConfigurator.configure(LogConfigurator.java:103)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:259)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)
Refer to the log for complete error details.
Exception in thread "main" ElasticsearchException[Failed to load logging configuration]; nested: NoSuchFileException[/usr/share/elasticsearch/config];
Likely root cause: java.nio.file.NoSuchFileException: /usr/share/elasticsearch/config
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
at sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:144)
at sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99)
at java.nio.file.Files.readAttributes(Files.java:1737)
at java.nio.file.FileTreeWalker.getAttributes(FileTreeWalker.java:225)
at java.nio.file.FileTreeWalker.visit(FileTreeWalker.java:276)
at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:322)
at java.nio.file.Files.walkFileTree(Files.java:2662)
at org.elasticsearch.common.logging.log4j.LogConfigurator.resolveConfig(LogConfigurator.java:142)
at org.elasticsearch.common.logging.log4j.LogConfigurator.configure(LogConfigurator.java:103)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:259)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)
Refer to the log for complete error details.
I guess is because I have installed ES in my Ubuntu machine, which adds the config files into /etc/elasticsearch/ and also is already running as a service. I tried to symlink the folder, but the folder permissions are:
drwxr-x--- 3 root elasticsearch 4,0K nov 8 17:32 elasticsearch
So I tried to add my user to elasticsearch group but I had no luck. Any ideas?

Answer 1

I finished just copying the files and changing the owner:
sudo cp -r /etc/elasticsearch/ /usr/share/elasticsearch/config
sudo chown $(whoami):$(whoami) /usr/share/elasticsearch/config/*
Maybe not the best solution, but effective.