crystal-loki-client

Crystal client library for accessing Grafana Loki APIs.

Supported APIs

• /loki/api/v1/query
• /loki/api/v1/query_range
• /loki/api/v1/labels
• /loki/api/v1/label/xxx/values
• /loki/api/v1/series
• /loki/api/v1/index/stats

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     loki-client:
       github: spider-gazelle/crystal-loki-client

2. Run shards install

Usage

require "loki-client"

You can configure the environment using the following variables or configure them via code.

• LOKI_ADDR - Loki Server address.
• LOKI_USERNAME - Username for HTTP basic auth.
• LOKI_PASSWORD - Password for HTTP basic auth.
• LOKI_CA_CERT_PATH - Path to the server Certificate Authority.
• LOKI_TLS_SKIP_VERIFY - Server certificate TLS skip verify.
• LOKI_CLIENT_CERT_PATH - Path to the client certificate.
• LOKI_CLIENT_KEY_PATH - Path to the client certificate key.
• LOKI_ORG_ID - adds X-Scope-OrgID to API requests for representing tenant ID. Useful for requesting tenant data when bypassing an auth gateway.
• LOKI_QUERY_TAGS - adds X-Query-Tags http header to API requests. Useful for tracking the query.
• LOKI_BEARER_TOKEN - adds the Authorization header to API requests for authentication purposes.
• LOKI_BEARER_TOKEN_FILE - adds the Authorization header to API requests for authentication purposes.
• LOKI_AUTH_HEADER - The authorization header used. Defaults to Authorization
• https_proxy or http_proxy - for proxy configuration

client = Loki::Client.from_env

# call endpoints
#
# client.query(my_query...)
# client.query_range(my_query ....)
# client.list_labels(since) # 1.hour ...
# ....

Development

Contributing

1. Fork it (https://github.com/spider-gazelle/crystal-loki-client/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Ali Naqvi - creator and maintainer