Class: Bosh::Monitor::AgentManager
- Inherits:
-
Object
- Object
- Bosh::Monitor::AgentManager
- Defined in:
- lib/bosh/monitor/agent_manager.rb
Instance Attribute Summary collapse
-
#alerts_processed ⇒ Object
readonly
Returns the value of attribute alerts_processed.
-
#alerts_received ⇒ Object
readonly
Returns the value of attribute alerts_received.
-
#heartbeats_received ⇒ Object
readonly
Returns the value of attribute heartbeats_received.
-
#processor ⇒ Object
Returns the value of attribute processor.
Instance Method Summary collapse
-
#add_agent(deployment_name, vm_data) ⇒ Object
Processes VM data from BOSH Director, extracts relevant agent data, wraps it into Agent object and adds it to a list of managed agents.
- #agents_count ⇒ Object
- #analyze_agent(agent_id) ⇒ Object
- #analyze_agents ⇒ Object
- #deployments_count ⇒ Object
-
#get_agents_for_deployment(deployment_name) ⇒ Object
Get a hash of agent id -> agent object for all agents associated with the deployment.
-
#initialize(event_processor) ⇒ AgentManager
constructor
A new instance of AgentManager.
- #lookup_plugin(name, options = {}) ⇒ Object
- #on_alert(agent, message) ⇒ Object
- #on_heartbeat(agent, message) ⇒ Object
- #on_shutdown(agent, message) ⇒ Object
- #process_event(kind, subject, payload = {}) ⇒ Object
- #remove_agent(agent_id) ⇒ Object
- #remove_deployment(name) ⇒ Object
- #setup_events ⇒ Object
- #sync_agents(deployment, vms) ⇒ Object
-
#sync_deployments(deployments) ⇒ Object
Syncs deployments list received from director with HM deployments.
Constructor Details
#initialize(event_processor) ⇒ AgentManager
Returns a new instance of AgentManager.
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# File 'lib/bosh/monitor/agent_manager.rb', line 10 def initialize(event_processor) # hash of agent id to agent structure (see add_agent()) @agents = { } # hash of deployment name to set of agent ids @deployments = { } @logger = Bhm.logger @heartbeats_received = 0 @alerts_received = 0 @alerts_processed = 0 @processor = event_processor end |
Instance Attribute Details
#alerts_processed ⇒ Object (readonly)
Returns the value of attribute alerts_processed.
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# File 'lib/bosh/monitor/agent_manager.rb', line 6 def alerts_processed @alerts_processed end |
#alerts_received ⇒ Object (readonly)
Returns the value of attribute alerts_received.
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# File 'lib/bosh/monitor/agent_manager.rb', line 5 def alerts_received @alerts_received end |
#heartbeats_received ⇒ Object (readonly)
Returns the value of attribute heartbeats_received.
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# File 'lib/bosh/monitor/agent_manager.rb', line 4 def heartbeats_received @heartbeats_received end |
#processor ⇒ Object
Returns the value of attribute processor.
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# File 'lib/bosh/monitor/agent_manager.rb', line 8 def processor @processor end |
Instance Method Details
#add_agent(deployment_name, vm_data) ⇒ Object
Processes VM data from BOSH Director, extracts relevant agent data, wraps it into Agent object and adds it to a list of managed agents.
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# File 'lib/bosh/monitor/agent_manager.rb', line 121 def add_agent(deployment_name, vm_data) unless vm_data.kind_of?(Hash) @logger.error("Invalid format for VM data: expected Hash, got #{vm_data.class}: #{vm_data}") return false end @logger.info("Adding agent #{vm_data["agent_id"]} (#{vm_data["job"]}/#{vm_data["index"]}) to #{deployment_name}...") agent_id = vm_data["agent_id"] agent_cid = vm_data["cid"] if agent_id.nil? @logger.warn("No agent id for VM: #{vm_data}") return false end # Idle VMs, we don't care about them, but we still want to track them if vm_data["job"].nil? @logger.debug("VM with no job found: #{agent_id}") end agent = @agents[agent_id] if agent.nil? @logger.debug("Discovered agent #{agent_id}") agent = Agent.new(agent_id) @agents[agent_id] = agent end agent.deployment = deployment_name agent.job = vm_data["job"] agent.index = vm_data["index"] agent.cid = vm_data["cid"] @deployments[deployment_name] ||= Set.new @deployments[deployment_name] << agent_id true end |
#agents_count ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 64 def agents_count @agents.size end |
#analyze_agent(agent_id) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 187 def analyze_agent(agent_id) agent = @agents[agent_id] ts = Time.now.to_i if agent.nil? @logger.error("Can't analyze agent #{agent_id} as it is missing from agents index, skipping...") return false end if agent.timed_out? && agent.rogue? # Agent has timed out but it was never # actually a proper member of the deployment, # so we don't really care about it remove_agent(agent.id) return end if agent.timed_out? @processor.process(:alert, severity: 2, source: agent.name, title: "#{agent.id} has timed out", created_at: ts, deployment: agent.deployment, job: agent.job, index: agent.index) end if agent.rogue? @processor.process(:alert, :severity => 2, :source => agent.name, :title => "#{agent.id} is not a part of any deployment", :created_at => ts) end true end |
#analyze_agents ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 160 def analyze_agents @logger.info "Analyzing agents..." started = Time.now processed = Set.new count = 0 # Agents from managed deployments @deployments.each_pair do |deployment_name, agent_ids| agent_ids.each do |agent_id| analyze_agent(agent_id) processed << agent_id count += 1 end end # Rogue agents (hey there Solid Snake) (@agents.keys.to_set - processed).each do |agent_id| @logger.warn("Agent #{agent_id} is not a part of any deployment") analyze_agent(agent_id) count += 1 end @logger.info("Analyzed %s, took %s seconds" % [ pluralize(count, "agent"), Time.now - started ]) count end |
#deployments_count ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 68 def deployments_count @deployments.size end |
#get_agents_for_deployment(deployment_name) ⇒ Object
Get a hash of agent id -> agent object for all agents associated with the deployment
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# File 'lib/bosh/monitor/agent_manager.rb', line 26 def get_agents_for_deployment(deployment_name) agent_ids = @deployments[deployment_name] @agents.select { |key, value| agent_ids.include?(key) } end |
#lookup_plugin(name, options = {}) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 31 def lookup_plugin(name, = {}) plugin_class = nil begin class_name = name.to_s.split("_").map(&:capitalize).join plugin_class = Bosh::Monitor::Plugins.const_get(class_name) rescue NameError => e raise PluginError, "Cannot find `#{name}' plugin" end plugin_class.new() end |
#on_alert(agent, message) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 268 def on_alert(agent, ) if .is_a?(Hash) && !.has_key?("source") ["source"] = agent.name end @processor.process(:alert, ) @alerts_processed += 1 end |
#on_heartbeat(agent, message) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 277 def on_heartbeat(agent, ) agent.updated_at = Time.now if .is_a?(Hash) ["timestamp"] = Time.now.to_i if ["timestamp"].nil? ["agent_id"] = agent.id ["deployment"] = agent.deployment end @processor.process(:heartbeat, ) @heartbeats_received += 1 end |
#on_shutdown(agent, message) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 290 def on_shutdown(agent, ) @logger.info("Agent `#{agent.id}' shutting down...") remove_agent(agent.id) end |
#process_event(kind, subject, payload = {}) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 226 def process_event(kind, subject, payload = {}) kind = kind.to_s agent_id = subject.split('.', 4).last agent = @agents[agent_id] if agent.nil? # There might be more than a single shutdown event, # we are only interested in processing it if agent # is still managed return if kind == "shutdown" @logger.warn("Received #{kind} from unmanaged agent: #{agent_id}") agent = Agent.new(agent_id) @agents[agent_id] = agent else @logger.debug("Received #{kind} from #{agent_id}: #{payload}") end case payload when String = Yajl::Parser.parse(payload) when Hash = payload end case kind.to_s when "alert" on_alert(agent, ) when "heartbeat" on_heartbeat(agent, ) when "shutdown" on_shutdown(agent, ) else @logger.warn("No handler found for `#{kind}' event") end rescue Yajl::ParseError => e @logger.error("Cannot parse incoming event: #{e}") rescue Bhm::InvalidEvent => e @logger.error("Invalid event: #{e}") end |
#remove_agent(agent_id) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 110 def remove_agent(agent_id) @logger.info("Removing agent #{agent_id} from all deployments...") @agents.delete(agent_id) @deployments.each_pair do |deployment, agents| agents.delete(agent_id) end end |
#remove_deployment(name) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 100 def remove_deployment(name) agent_ids = @deployments[name] agent_ids.to_a.each do |agent_id| @agents.delete(agent_id) end @deployments.delete(name) end |
#setup_events ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 43 def setup_events @processor.enable_pruning(Bhm.intervals.prune_events) Bhm.plugins.each do |plugin| @processor.add_plugin(lookup_plugin(plugin["name"], plugin["options"]), plugin["events"]) end EM.schedule do Bhm.nats.subscribe("hm.agent.heartbeat.*") do |, reply, subject| process_event(:heartbeat, subject, ) end Bhm.nats.subscribe("hm.agent.alert.*") do |, reply, subject| process_event(:alert, subject, ) end Bhm.nats.subscribe("hm.agent.shutdown.*") do |, reply, subject| process_event(:shutdown, subject, ) end end end |
#sync_agents(deployment, vms) ⇒ Object
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# File 'lib/bosh/monitor/agent_manager.rb', line 85 def sync_agents(deployment, vms) managed_agent_ids = @deployments[deployment] || Set.new active_agent_ids = Set.new vms.each do |vm| if add_agent(deployment, vm) active_agent_ids << vm["agent_id"] end end (managed_agent_ids - active_agent_ids).each do |agent_id| remove_agent(agent_id) end end |
#sync_deployments(deployments) ⇒ Object
Syncs deployments list received from director with HM deployments.
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# File 'lib/bosh/monitor/agent_manager.rb', line 75 def sync_deployments(deployments) managed = Set.new(deployments.map { |d| d["name"] }) all = Set.new(@deployments.keys) (all - managed).each do |stale_deployment| @logger.warn("Found stale deployment #{stale_deployment}, removing...") remove_deployment(stale_deployment) end end |