feat: add splunk o11y dashboards

modules/integrations/splunk_o11y_conf_shared/backend.tf

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+terraform {
+  # Intentionally empty. Will be filled by Terragrunt.
+  backend "s3" {}
+}

modules/integrations/splunk_o11y_conf_shared/dashboard_billing.tf

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+resource "signalfx_time_chart" "cost_per_service" {
+  name        = "Cost per service"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.cost_usd')
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+C = B.sum(by=['service', 'forgecicd_tenant','usage_month', 'usage_year'])
+
+# publish both current and baseline
+C.publish(label='current')
+EOF
+
+  plot_type = "AreaChart"
+
+  axes_precision            = 0
+  on_chart_legend_dimension = "service"
+  time_range                = 3600
+
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+}
+
+resource "signalfx_time_chart" "net_cost_per_service" {
+  name        = "Net Cost per service"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.net_cost_usd')
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+C = B.sum(by=['service', 'forgecicd_tenant','usage_month', 'usage_year'])  # removes usage_date from label
+
+# publish both current and baseline
+C.publish(label='current')
+EOF
+
+  plot_type = "AreaChart"
+
+  axes_precision = 0
+  time_range     = 3600
+
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+}
+
+resource "signalfx_time_chart" "net_cost_per_tenant" {
+  name        = "Net Cost per tenant"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.net_cost_usd')
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+C = B.sum(by=['forgecicd_tenant','usage_month', 'usage_year'])
+D = C.timeshift('29d')
+
+# publish both current and baseline
+C.publish(label='current')
+#D.publish(label='baseline')
+EOF
+
+  plot_type = "AreaChart"
+
+  axes_precision = 0
+  time_range     = 3600
+
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+}
+
+resource "signalfx_time_chart" "cost_per_tenant" {
+  name        = "Cost per tenant"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.cost_usd')
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+C = B.sum(by=['forgecicd_tenant','usage_month', 'usage_year'])
+D = C.timeshift('29d')
+
+# publish both current and baseline
+C.publish(label='current')
+#D.publish(label='baseline')
+EOF
+
+  plot_type = "AreaChart"
+
+  axes_precision            = 0
+  on_chart_legend_dimension = "service"
+  time_range                = 3600
+
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+}
+
+resource "signalfx_time_chart" "total_cost" {
+  name        = "Total Cost"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.cost_usd')
+
+# Take max per day/service/tenant, carrying forward last value if missing
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+
+# Sum by month, still carrying forward where needed
+C = B.sum(by=['usage_month', 'usage_year'])
+
+# Shift by 29 days to get a baseline comparison
+D = C.timeshift('29d')
+
+# Publish both
+C.publish(label='current')
+D.publish(label='baseline')
+EOF
+
+  plot_type                 = "AreaChart"
+  axes_precision            = 0
+  on_chart_legend_dimension = "service"
+
+
+  time_range = 3600
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+  viz_options {
+    axis         = "left"
+    color        = "red"
+    display_name = "baseline"
+    label        = "baseline"
+  }
+}
+
+resource "signalfx_time_chart" "total_net_cost" {
+  name        = "Total Net Cost"
+  description = ""
+
+  program_text = <<-EOF
+A = data('forge.per_service.net_cost_usd')
+
+# Take max per day/service/tenant, carrying forward last value if missing
+B = A.max(by=['usage_date', 'service', 'forgecicd_tenant','usage_month', 'usage_year'])
+
+# Sum by month, still carrying forward where needed
+C = B.sum(by=['usage_month', 'usage_year'])
+
+# Shift by 29 days to get a baseline comparison
+D = C.timeshift('29d')
+
+# Publish both
+C.publish(label='current')
+# D.publish(label='baseline')
+EOF
+
+  plot_type      = "AreaChart"
+  axes_precision = 0
+
+  time_range = 3600
+
+  histogram_options {
+    color_theme = "gold"
+  }
+
+  viz_options {
+    axis         = "left"
+    color        = "blue"
+    display_name = "current"
+    label        = "current"
+  }
+}
+
+resource "signalfx_dashboard" "billing" {
+  name            = "Billing"
+  description     = ""
+  dashboard_group = signalfx_dashboard_group.forgecicd.id
+
+  time_range = "-31d"
+
+  variable {
+    property         = "forgecicd_tenant"
+    alias            = "ForgeCICD Tenant Name"
+    description      = ""
+    values           = []
+    value_required   = false
+    values_suggested = var.dashboard_variables.runner_k8s.tenant_names
+  }
+
+  dynamic "variable" {
+    for_each = var.dashboard_variables.billing.dynamic_variables
+    iterator = var_def
+
+    content {
+      property         = var_def.value.property
+      alias            = var_def.value.alias
+      description      = var_def.value.description
+      values           = var_def.value.values
+      value_required   = var_def.value.value_required
+      values_suggested = var_def.value.values_suggested
+    }
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.cost_per_service.id
+    row      = 0
+    column   = 0
+    width    = 6
+    height   = 1
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.net_cost_per_service.id
+    row      = 0
+    column   = 6
+    width    = 6
+    height   = 1
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.cost_per_tenant.id
+    row      = 1
+    column   = 0
+    width    = 6
+    height   = 1
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.net_cost_per_tenant.id
+    row      = 1
+    column   = 6
+    width    = 6
+    height   = 1
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.total_cost.id
+    row      = 2
+    column   = 0
+    width    = 6
+    height   = 1
+  }
+
+  chart {
+    chart_id = signalfx_time_chart.total_net_cost.id
+    row      = 2
+    column   = 6
+    width    = 6
+    height   = 1
+  }
+}

modules/integrations/splunk_o11y_conf_shared/dashboard_groups.tf

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+resource "signalfx_dashboard_group" "forgecicd" {
+  name        = "ForgeCICD Dashboards"
+  description = ""
+  teams       = [var.team]
+}