Graham McIntire
ae9983c4f6
Replaced per-agent queries with batch queries in get_organization_agent_health: - get_batch_equipment_counts: Returns counts for all agents at once - get_batch_last_metric_times: Single GROUP BY query for all agent metrics Performance improvement: For 10 agents, reduces from 21 queries to 3 queries. Note: Equipment counting still uses application logic due to complex hierarchical inheritance rules. Last metric times now use efficient grouped query with agent assignments join.
330 lines
9.7 KiB
Elixir
330 lines
9.7 KiB
Elixir
defmodule Towerops.Agents.Stats do
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@moduledoc """
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Statistical queries and analytics for agent monitoring and health.
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Provides functions to monitor agent health, performance, and usage across the organization.
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"""
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import Ecto.Query, warn: false
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alias Towerops.Agents.AgentAssignment
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alias Towerops.Agents.AgentToken
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alias Towerops.Equipment.Equipment
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alias Towerops.Repo
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alias Towerops.Snmp.SensorReading
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@doc """
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Get agent health statistics for an organization.
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Returns a list of agents with their health metrics:
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- Online status (last_seen_at within 5 minutes)
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- Number of assigned equipment
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- Last metric submission time
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- Version information
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## Examples
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iex> get_organization_agent_health(org_id)
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[
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%{
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id: "uuid",
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name: "DC1 Agent",
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online: true,
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last_seen_at: ~U[2026-01-14 12:00:00Z],
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equipment_count: 15,
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last_metric_at: ~U[2026-01-14 12:00:30Z],
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version: "0.1.0",
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hostname: "agent-dc1"
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}
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]
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"""
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def get_organization_agent_health(organization_id) do
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five_minutes_ago = DateTime.add(DateTime.utc_now(), -5, :minute)
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query =
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from(a in AgentToken,
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where: a.organization_id == ^organization_id and a.enabled == true,
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select: %{
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id: a.id,
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name: a.name,
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online: a.last_seen_at > ^five_minutes_ago,
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last_seen_at: a.last_seen_at,
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version: fragment("?->>'version'", a.metadata),
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hostname: fragment("?->>'hostname'", a.metadata)
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},
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order_by: [desc: a.last_seen_at]
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)
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agents = Repo.all(query)
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# Get equipment counts for all agents in a single query
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equipment_counts = get_batch_equipment_counts(Enum.map(agents, & &1.id))
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# Get last metric times for all agents in a single query
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last_metrics = get_batch_last_metric_times(Enum.map(agents, & &1.id))
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# Combine data for each agent
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Enum.map(agents, fn agent ->
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agent
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|> Map.put(:equipment_count, Map.get(equipment_counts, agent.id, 0))
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|> Map.put(:last_metric_at, Map.get(last_metrics, agent.id))
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end)
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end
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@doc """
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Get equipment count breakdown by agent assignment source.
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Returns counts for equipment assigned via:
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- Direct assignment
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- Site default
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- Organization default
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- No agent (cloud polling)
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## Examples
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iex> get_equipment_assignment_breakdown(org_id)
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%{
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direct: 50,
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site: 30,
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organization: 15,
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cloud: 5
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}
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"""
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def get_equipment_assignment_breakdown(organization_id) do
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# Get all equipment for organization
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equipment_query =
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from(e in Equipment,
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join: s in assoc(e, :site),
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where: s.organization_id == ^organization_id and e.snmp_enabled == true,
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preload: [:site, site: :organization]
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)
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equipment_list = Repo.all(equipment_query)
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# Count by assignment type
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Enum.reduce(equipment_list, %{direct: 0, site: 0, organization: 0, cloud: 0}, fn eq, acc ->
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{_agent_id, source} = Towerops.Agents.get_effective_agent_token_with_source(eq)
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case source do
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:equipment -> %{acc | direct: acc.direct + 1}
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:site -> %{acc | site: acc.site + 1}
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:organization -> %{acc | organization: acc.organization + 1}
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:none -> %{acc | cloud: acc.cloud + 1}
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end
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end)
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end
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@doc """
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Get metric submission stats for an agent over the last 24 hours.
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Returns:
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- Total metrics submitted
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- Sensor readings count
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- Interface stats count
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- Average metrics per hour
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- Last successful submission
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## Examples
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iex> get_agent_metric_stats(agent_id)
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%{
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total_metrics: 1440,
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sensor_readings: 960,
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interface_stats: 480,
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avg_per_hour: 60,
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last_submission: ~U[2026-01-14 12:00:00Z]
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}
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"""
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def get_agent_metric_stats(agent_token_id) do
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twenty_four_hours_ago = DateTime.add(DateTime.utc_now(), -24, :hour)
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# Get sensor readings
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sensor_count =
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Repo.one(
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from(sr in SensorReading,
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join: s in assoc(sr, :sensor),
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join: d in assoc(s, :snmp_device),
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join: e in assoc(d, :equipment),
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where: sr.checked_at > ^twenty_four_hours_ago and e.id in subquery(polling_targets_subquery(agent_token_id)),
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select: count(sr.id)
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)
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) || 0
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# Get interface stats
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interface_count =
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Repo.one(
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from(is in Towerops.Snmp.InterfaceStat,
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join: i in assoc(is, :interface),
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join: d in assoc(i, :snmp_device),
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join: e in assoc(d, :equipment),
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where: is.checked_at > ^twenty_four_hours_ago and e.id in subquery(polling_targets_subquery(agent_token_id)),
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select: count(is.id)
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)
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) || 0
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total = sensor_count + interface_count
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# Get last submission time
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last_submission =
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Repo.one(
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from(sr in SensorReading,
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join: s in assoc(sr, :sensor),
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join: d in assoc(s, :snmp_device),
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join: e in assoc(d, :equipment),
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where: e.id in subquery(polling_targets_subquery(agent_token_id)),
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select: max(sr.checked_at)
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)
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)
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%{
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total_metrics: total,
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sensor_readings: sensor_count,
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interface_stats: interface_count,
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avg_per_hour: if(total > 0, do: Float.round(total / 24, 1), else: 0),
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last_submission: last_submission
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}
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end
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@doc """
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Get list of offline agents (not seen in last 5 minutes).
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Returns list of agent tokens that haven't reported in recently.
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## Examples
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iex> get_offline_agents(org_id)
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[
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%{id: "uuid", name: "DC2 Agent", last_seen_at: ~U[2026-01-14 10:00:00Z]}
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]
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"""
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def get_offline_agents(organization_id) do
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five_minutes_ago = DateTime.add(DateTime.utc_now(), -5, :minute)
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Repo.all(
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from(a in AgentToken,
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where:
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a.organization_id == ^organization_id and a.enabled == true and
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(is_nil(a.last_seen_at) or a.last_seen_at < ^five_minutes_ago),
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select: %{id: a.id, name: a.name, last_seen_at: a.last_seen_at},
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order_by: [asc: a.last_seen_at]
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)
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)
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end
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@doc """
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Get agents with high load (>50 devices).
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Identifies agents that may need to be split or have their equipment redistributed.
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## Examples
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iex> get_high_load_agents(org_id)
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[
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%{id: "uuid", name: "DC1 Agent", equipment_count: 75}
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]
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"""
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def get_high_load_agents(organization_id, threshold \\ 50) do
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query =
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from(a in AgentToken,
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where: a.organization_id == ^organization_id and a.enabled == true,
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select: %{id: a.id, name: a.name}
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)
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agents = Repo.all(query)
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# Get equipment count for each agent, filter by threshold, and sort
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agents
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|> Enum.map(fn agent ->
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equipment_count = get_agent_equipment_count(agent.id)
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Map.put(agent, :equipment_count, equipment_count)
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end)
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|> Enum.filter(fn agent -> agent.equipment_count > threshold end)
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|> Enum.sort_by(& &1.equipment_count, :desc)
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end
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@doc """
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Get equipment that have no agent assigned and are not polling.
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Identifies orphaned equipment that may need agent assignment.
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## Examples
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iex> get_unmonitored_equipment(org_id)
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[
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%{id: "uuid", name: "Switch-01", site_name: "DC1"}
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]
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"""
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def get_unmonitored_equipment(organization_id) do
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from(e in Equipment,
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join: s in assoc(e, :site),
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left_join: o in assoc(s, :organization),
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where:
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s.organization_id == ^organization_id and
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e.snmp_enabled == true and
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e.monitoring_enabled == true,
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preload: [site: :organization]
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)
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|> Repo.all()
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|> Enum.filter(fn equipment ->
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# Filter to only equipment with no agent assigned
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{agent_id, _source} = Towerops.Agents.get_effective_agent_token_with_source(equipment)
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is_nil(agent_id)
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end)
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|> Enum.map(fn equipment ->
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%{
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id: equipment.id,
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name: equipment.name,
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ip_address: equipment.ip_address,
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site_name: equipment.site.name
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}
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end)
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end
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# Private helper functions
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defp polling_targets_subquery(agent_token_id) do
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# This is a simplified version - in production you'd want to use
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# Agents.list_agent_polling_targets/1 logic here
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from(e in Equipment,
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join: a in AgentAssignment,
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on: a.equipment_id == e.id,
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where: a.agent_token_id == ^agent_token_id and a.enabled == true and e.snmp_enabled == true,
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select: e.id
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)
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end
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defp get_agent_equipment_count(agent_token_id) do
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# Count equipment by using list_agent_polling_targets
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# This properly handles hierarchical assignment
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agent_token_id
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|> Towerops.Agents.list_agent_polling_targets()
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|> length()
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end
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defp get_batch_equipment_counts(agent_token_ids) do
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# For now, use the existing function per agent since list_agent_polling_targets
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# handles complex hierarchical logic in application code
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# TODO: Optimize this with a pure SQL solution if it becomes a bottleneck
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Map.new(agent_token_ids, fn id -> {id, get_agent_equipment_count(id)} end)
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end
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defp get_batch_last_metric_times(agent_token_ids) do
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# Get last metric time for all agents in a single query
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# Group by equipment ID, then map to agent via assignments
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results =
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Repo.all(
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from(sr in SensorReading,
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join: s in assoc(sr, :sensor),
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join: d in assoc(s, :snmp_device),
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join: e in assoc(d, :equipment),
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join: aa in AgentAssignment,
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on: aa.equipment_id == e.id and aa.enabled == true,
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where: aa.agent_token_id in ^agent_token_ids,
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group_by: aa.agent_token_id,
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select: {aa.agent_token_id, max(sr.checked_at)}
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)
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)
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Map.new(results)
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end
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end
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