[Dynamic Config] Fix bug when attempting dynamic config index creation

[huyaboo]

Description

This PR fixes a bug that can occur if the alias .opensearch_dashboards_dynamic_config exists but not the index opensearch_dashboards_dynamic_config_N. In particular the following test cases are as follows:

Alias present?	Alias points to what index(es)?	Expected behavior
No	No index	Create new index with alias
No	.opensearch_dashboards_dynamic_config_N	Update index with alias
No	.opensearch_dashboards_dynamic_config_1	Update index with alias
Yes	Multiple indexes	Throw error
Yes	A non .opensearch_dashboards_dynamic_config_* index	Throw error
Yes	A valid .opensearch_dashboards_dynamic_config_* index	Do nothing

Issues Resolved

Testing the changes

Attached are the following cases when calling dev tools or by looking in application logs:

• No alias, no .opensearch_dashboards_dynamic_config_1 index

GET _cat/indices

yellow open .opensearch_dashboards_dynamic_config_1 sXe3MP8hS7ibdy0KMQwIIQ 1 1 0 0  208b  208b
green  open .kibana_1                               SAzyiuKvSCKNn4zrIVUY9Q 1 0 1 0 5.1kb 5.1kb

GET _cat/aliases
.opensearch_dashboards_dynamic_config .opensearch_dashboards_dynamic_config_1 - - - -
.kibana                               .kibana_1                               - - - -

• No alias, .opensearch_dashboards_dynamic_config_N present (used below curl command)

curl -X PUT "http://localhost:9200/.opensearch_dashboards_dynamic_config_4"

GET _cat/indices

yellow open .opensearch_dashboards_dynamic_config_4 OcHhtiswT7Op03sr260hxg 1 1 0 0  208b  208b
green  open .kibana_1                               VZGJVZFURPiE3Xx3AyTgsg 1 0 1 0 5.1kb 5.1kb

GET _cat/aliases
.opensearch_dashboards_dynamic_config .opensearch_dashboards_dynamic_config_4 - - - -
.kibana                               .kibana_1                               - - - -

• No alias, .opensearch_dashboards_dynamic_config_1 present (used below curl command)

curl -X PUT "http://localhost:9200/.opensearch_dashboards_dynamic_config_1"

GET _cat/indices

yellow open ..opensearch_dashboards_dynamic_config i5GcQi6OTEGwvGxI4kKnow 1 1 0 0  208b  208b
green  open .kibana_1                               ytbTll4tQ6mWGGMtiiuEXQ 1 0 1 0 5.1kb 5.1kb

GET _cat/aliases
.opensearch_dashboards_dynamic_config .opensearch_dashboards_dynamic_config_1 - - - -
.kibana                               .kibana_1                               - - - -

• Alias, multiple indices pointed to alias

 FATAL  Error: Alias .opensearch_dashboards_dynamic_config is pointing to 0 or multiple indices. Please remove the alias(es) and restart the server

• Alias, .random_index_3 pointed to alias (used below curl command)

curl -X PUT "http://localhost:9200/.random_index_3" -H 'Content-Type: application/json' -d '
{
  "aliases": {
    ".opensearch_dashboards_dynamic_config": {}
  }
}
'

 FATAL  Error: Alias .opensearch_dashboards_dynamic_config is pointing to a non dynamic config index. Please remove the alias and restart the server

• Alias, valid .opensearch_dashboards_dynamic_config_1 pointed to alias

GET _cat/indices

yellow open .opensearch_dashboards_dynamic_config_1 i5GcQi6OTEGwvGxI4kKnow 1 1 0 0  208b  208b
green  open .kibana_1                               ytbTll4tQ6mWGGMtiiuEXQ 1 0 1 0 5.1kb 5.1kb

GET _cat/aliases
.opensearch_dashboards_dynamic_config .opensearch_dashboards_dynamic_config_1 - - - -
.kibana                               .kibana_1                               - - - -

Changelog

• fix: Fix bug when dynamic config index and alias are checked

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 64.04%. Comparing base (18875f7) to head (f8964ad).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...fig_store_client/opensearch_config_store_client.ts	95.45%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8184      +/-   ##
==========================================
- Coverage   64.04%   64.04%   -0.01%     
==========================================
  Files        3740     3740              
  Lines       88582    88608      +26     
  Branches    13791    13799       +8     
==========================================
+ Hits        56731    56745      +14     
- Misses      31253    31265      +12     
  Partials      598      598              

Flag	Coverage Δ
Linux_1	30.03% <6.66%> (-0.01%)	⬇️
Linux_2	58.83% <96.66%> (+0.03%)	⬆️
Linux_3	40.37% <6.66%> (-0.02%)	⬇️
Linux_4	31.46% <6.66%> (-0.02%)	⬇️
Windows_1	30.05% <6.66%> (-0.03%)	⬇️
Windows_2	58.78% <96.66%> (+0.03%)	⬆️
Windows_3	40.37% <6.66%> (-0.02%)	⬇️
Windows_4	31.46% <6.66%> (-0.02%)	⬇️

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