Class: Pvectl::Presenters::TopNode

Inherits:
Node
  • Object
show all
Includes:
TopPresenter
Defined in:
lib/pvectl/presenters/top_node.rb

Overview

Presenter for node resource usage metrics (top command).

Inherits from Presenters::Node for reuse of formatting methods. Focuses on CPU, memory, disk, and swap utilization rather than operational details (version, kernel, services).

Examples:

Using with formatter

presenter = TopNode.new
formatter = Formatters::Table.new
output = formatter.format(nodes, presenter)

See Also:

Instance Method Summary collapse

Methods included from TopPresenter

#cpu_cores_value, #cpu_usage_value, #percent_display, #percent_value

Methods inherited from Node

#alerts, #alerts_display, #boot_mode, #cpu_cores, #cpu_model, #cpu_percent, #cpu_sockets, #disk_total_gb, #disk_used_gb, #dns_nameservers, #dns_search, #has_alerts?, #ip_display, #kernel_display, #load_1m, #load_display, #local_time, #memory_display, #memory_total_gb, #memory_used_gb, #rootfs_display, #rootfs_usage_percent, #storage_display, #subscription_display, #swap_display, #swap_total_gb, #swap_used_gb, #timezone, #to_description, #uptime_human, #version_display

Methods inherited from Base

#tags_array, #tags_display, #template_display, #to_description, #to_wide_row, #uptime_human, #wide_columns

Instance Method Details

#columns ⇒ Array<String>

Returns column headers for standard table output.

Returns:

  • (Array<String>) —

    column headers



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# File 'lib/pvectl/presenters/top_node.rb', line 25

def columns
  %w[NAME CPU(cores) CPU% MEMORY MEMORY%]
end

#extra_columns ⇒ Array<String>

Returns additional column headers for wide output.

Returns:

  • (Array<String>) —

    extra column headers



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# File 'lib/pvectl/presenters/top_node.rb', line 32

def extra_columns
  %w[DISK DISK% SWAP SWAP% LOAD GUESTS]
end

#extra_values(model, **_context) ⇒ Array<String>

Returns additional values for wide output.

Parameters:

  • model (Models::Node) —

    Node model

  • context (Hash) —

    optional context

Returns:

  • (Array<String>) —

    extra values matching extra_columns order



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# File 'lib/pvectl/presenters/top_node.rb', line 58

def extra_values(model, **_context)
  @node = model
  [
    storage_display,
    percent_display(node.disk, node.maxdisk),
    swap_display,
    swap_percent_display(node),
    load_display,
    node.guests_total.to_s
  ]
end

#to_hash(model) ⇒ Hash

Converts Node model to hash for JSON/YAML output.

Returns metrics-focused hash without operational info (no version, kernel, uptime, alerts, network).

Parameters:

Returns:

  • (Hash) —

    metrics-focused hash representation



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# File 'lib/pvectl/presenters/top_node.rb', line 77

def to_hash(model)
  @node = model
  {
    "name" => node.name,
    "cpu" => {
      "usage_percent" => node.cpu.nil? ? nil : (node.cpu * 100).round,
      "cores" => node.maxcpu
    },
    "memory" => {
      "used_bytes" => node.mem,
      "total_bytes" => node.maxmem,
      "usage_percent" => memory_percent(node)
    },
    "disk" => {
      "used_bytes" => node.disk,
      "total_bytes" => node.maxdisk,
      "usage_percent" => storage_percent(node)
    },
    "swap" => {
      "used_bytes" => node.swap_used,
      "total_bytes" => node.swap_total,
      "usage_percent" => swap_percent(node)
    },
    "load" => {
      "avg1" => node.loadavg&.dig(0),
      "avg5" => node.loadavg&.dig(1),
      "avg15" => node.loadavg&.dig(2)
    },
    "guests" => {
      "total" => node.guests_total,
      "vms" => node.guests_vms,
      "cts" => node.guests_cts
    }
  }
end

#to_row(model, **_context) ⇒ Array<String>

Converts Node model to table row with metrics values.

Parameters:

  • model (Models::Node) —

    Node model

  • context (Hash) —

    optional context

Returns:

  • (Array<String>) —

    row values matching columns order



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# File 'lib/pvectl/presenters/top_node.rb', line 41

def to_row(model, **_context)
  @node = model
  cores = node.offline? ? "-" : cpu_cores_value(node)
  [
    node.name,
    cores,
    cpu_percent,
    memory_display,
    memory_percent_display(node)
  ]
end