[couchdb][server] Add CouchDB package with Server data stream

[yug-rajani]

• Enhancement

What does this PR do?

• Generated the skeleton of CouchDB integration package.
• Added 1 data stream ( Server )
• Added data collection logic.
• Added the ingest pipelines.
• Mapped fields according to the ECS schema and added Fields metadata in the appropriate yml files.
• Added system test cases.
• Same OOTB dashboards with agent-based integration as metricbeat module for CouchDB

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• If I'm introducing a new feature, I have modified the Kibana version constraint in my package's manifest.yml file to point to the latest Elastic stack release (e.g. ^7.13.0).

How to test this PR locally

• Clone integrations repo.
• Install elastic-package locally.
• Start elastic stack using elastic-package.
• Move to integrations/packages/couchdb directory.
• Run the following command to run tests.

elastic-package test

[elasticmachine]

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• Start Time: 2022-07-18T10:27:50.268+0000

• Duration: 16 min 24 sec

Test stats 🧪

Test	Results
Failed	0
Passed	5
Skipped	0
Total	5

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 3.049
Classes	100.0% (1/1)	💚 3.049
Methods	100.0% (7/7)	💚 10.947
Lines	94.175% (194/206)	👍 4.007
Conditionals	100.0% (0/0)	💚

[kush-elastic]

LGTM!

[lalit-satapathy]

Hi @yug-elastic,

I am having some trouble running this integration.

My couchDB is up and credentials are fine.

curl http://localhost:5984/
{"couchdb":"Welcome","version":"3.2.2","git_sha":"d5b746b7c","uuid":"aca7dc34f6431a77d2ee28a2fc9d5e93","features":["access-ready","partitioned","pluggable-storage-engines","reshard","scheduler"],"vendor":{"name":"The Apache Software Foundation"}}

But I get following error. Is the url user-id/password passed properly? what could be going wrong below.

[elastic_agent.metricbeat][error] Error fetching data for metricset http.json: error making http request: Get "http://localhost:5984/_node/_local/_stats": dial tcp 127.0.0.1:5984: connect: connection refused.

[yug-rajani]

Hi @yug-elastic,

I am having some trouble running this integration.

My couchDB is up and credentials are fine.

curl http://localhost:5984/
{"couchdb":"Welcome","version":"3.2.2","git_sha":"d5b746b7c","uuid":"aca7dc34f6431a77d2ee28a2fc9d5e93","features":["access-ready","partitioned","pluggable-storage-engines","reshard","scheduler"],"vendor":{"name":"The Apache Software Foundation"}}

But I get following error. Is the url user-id/password passed properly? what could be going wrong below.

[elastic_agent.metricbeat][error] Error fetching data for metricset http.json: error making http request: Get "http://localhost:5984/_node/_local/_stats": dial tcp 127.0.0.1:5984: connect: connection refused.

Hey @lalit-satapathy,
Thanks for reaching out. Your CouchDB instance looks fine. I doubt that the machine on which your elastic stack is running, is unable to access your CouchDB instance. Could you help me answer the questions below to better understand the problem:

1. Is your ELK stack and CouchDB instance running on the same local/virtual machine? I doubt if they are on the same network.
   I was able to bind the port and get a CouchDB instance up and running using:
   docker run -e COUCHDB_USER=admin -e COUCHDB_PASSWORD=password -p 5984:5984 -d couchdb

2. What is the response of curl http://localhost:5984/ or curl http://localhost:5984/_node/_local/_stats from the machine your elastic stack is running on?

3. Could you please let me know your hosts parameter in the configuration of your integration?

[lalit-satapathy]

Hi @yug-elastic,
I am having some trouble running this integration.
My couchDB is up and credentials are fine.

curl http://localhost:5984/
{"couchdb":"Welcome","version":"3.2.2","git_sha":"d5b746b7c","uuid":"aca7dc34f6431a77d2ee28a2fc9d5e93","features":["access-ready","partitioned","pluggable-storage-engines","reshard","scheduler"],"vendor":{"name":"The Apache Software Foundation"}}

But I get following error. Is the url user-id/password passed properly? what could be going wrong below.
[elastic_agent.metricbeat][error] Error fetching data for metricset http.json: error making http request: Get "http://localhost:5984/_node/_local/_stats": dial tcp 127.0.0.1:5984: connect: connection refused.

Hey @lalit-satapathy, Thanks for reaching out. Your CouchDB instance looks fine. I doubt that the machine on which your elastic stack is running, is unable to access your CouchDB instance. Could you help me answer the questions below to better understand the problem:

1. Is your ELK stack and CouchDB instance running on the same local/virtual machine? I doubt if they are on the same network.
   I was able to bind the port and get a CouchDB instance up and running using:
   docker run -e COUCHDB_USER=admin -e COUCHDB_PASSWORD=password -p 5984:5984 -d couchdb
2. What is the response of curl http://localhost:5984/ or curl http://localhost:5984/_node/_local/_stats from the machine your elastic stack is running on?
3. Could you please let me know your hosts parameter in the configuration of your integration?

I have fixed my local setup and the integration run is going fine now. I will review the results/dashboards sometime later.

[yug-rajani]

Hey @lalit-satapathy, did you get a chance to review the results/dashboards for this PR? Could you please do it so that we could merge this integration as it contains just one data stream which is contained as a part of this PR?

[lalit-satapathy]

Verified the results/dashboards using docker couchDB.

LGTM.