77 lines
3.1 KiB
HCL
77 lines
3.1 KiB
HCL
# main.tf
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# Step 1: Create all Grafana data sources with their basic configuration.
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# This resource establishes the fundamental properties of each data source.
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resource "grafana_data_source" "this" {
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for_each = var.datasources
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name = each.key
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type = each.value.type
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url = var.datasource_urls[each.value.url_key]
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is_default = coalesce(each.value.is_default, false)
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basic_auth_enabled = true
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basic_auth_username = var.datasource_users[each.value.user_key]
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secure_json_data_encoded = jsonencode({
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basicAuthPassword = var.datasource_passwords[each.value.pass_key]
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})
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# Encodes initial, non-dependent JSON data.
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# Configurations that depend on other datasource UIDs will be handled separately.
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json_data_encoded = each.value.json_data != null ? jsonencode(each.value.json_data) : null
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}
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# Step 2: Apply Loki-specific 'derivedFields' configuration.
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# This resource targets Loki data sources that need to link to another data source (like Tempo).
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# It runs after the initial data sources are created to resolve the UIDs.
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resource "grafana_data_source_config" "loki_derived_fields" {
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# Filter for datasources that are of type 'loki' and have 'derived_fields' defined.
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for_each = {
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for k, v in var.datasources : k => v
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if v.type == "loki" && v.derived_fields != null
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}
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# The UID of the Loki data source to configure.
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uid = grafana_data_source.this[each.key].uid
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# Construct the json_data with the derivedFields.
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json_data_encoded = jsonencode({
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derivedFields = [
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for field in each.value.derived_fields : {
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# The UID of the target data source (e.g., Tempo).
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datasourceUid = grafana_data_source.this[field.target_datasource_name].uid
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matcherRegex = field.matcher_regex
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name = field.name
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url = field.url
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}
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]
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})
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}
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# Step 3: Apply Tempo-specific 'tracesToLogsV2' configuration.
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# This resource targets Tempo data sources that need to link back to a logging data source (like Loki).
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resource "grafana_data_source_config" "tempo_traces_to_logs" {
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# Filter for datasources that are of type 'tempo' and have 'traces_to_logs' defined.
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for_each = {
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for k, v in var.datasources : k => v
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if v.type == "tempo" && v.traces_to_logs != null
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}
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# The UID of the Tempo data source to configure.
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uid = grafana_data_source.this[each.key].uid
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# Construct the json_data with the tracesToLogsV2 settings.
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json_data_encoded = jsonencode({
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tracesToLogsV2 = {
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# The UID of the target data source (e.g., Loki).
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datasourceUid = grafana_data_source.this[each.value.traces_to_logs.target_datasource_name].uid
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query = each.value.traces_to_logs.query
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customQuery = coalesce(each.value.traces_to_logs.custom_query, true)
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filterBySpanID = coalesce(each.value.traces_to_logs.filter_by_span_id, false)
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filterByTraceID = coalesce(each.value.traces_to_logs.filter_by_trace_id, false)
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spanStartTimeShift = each.value.traces_to_logs.span_start_time_shift
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spanEndTimeShift = each.value.traces_to_logs.span_end_time_shift
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}
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})
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}
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