mirror of
https://github.com/postmannen/ctrl.git
synced 2024-12-14 12:37:31 +00:00
488 lines
16 KiB
Go
488 lines
16 KiB
Go
package steward
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import (
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"context"
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"fmt"
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"log"
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"sync"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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)
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// processes holds all the information about running processes
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type processes struct {
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// The main context for subscriber processes.
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ctx context.Context
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// cancel func to send cancel signal to the subscriber processes context.
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cancel context.CancelFunc
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// The active spawned processes
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active procsMap
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// mutex to lock the map
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// mu sync.RWMutex
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// The last processID created
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lastProcessID int
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// The instance global prometheus registry.
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metrics *metrics
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// Waitgroup to keep track of all the processes started.
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wg sync.WaitGroup
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// tui
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tui *tui
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// errorKernel
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errorKernel *errorKernel
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// configuration
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configuration *Configuration
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// Signatures
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Signatures *signatures
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}
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// newProcesses will prepare and return a *processes which
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// is map containing all the currently running processes.
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func newProcesses(ctx context.Context, metrics *metrics, tui *tui, errorKernel *errorKernel, configuration *Configuration, signatures *signatures) *processes {
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p := processes{
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active: *newProcsMap(),
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tui: tui,
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errorKernel: errorKernel,
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configuration: configuration,
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Signatures: signatures,
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}
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// Prepare the parent context for the subscribers.
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ctx, cancel := context.WithCancel(ctx)
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// // Start the processes map.
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// go func() {
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// p.active.run(ctx)
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// }()
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p.ctx = ctx
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p.cancel = cancel
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p.metrics = metrics
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return &p
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}
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// ----------------------
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// ----------------------
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type procsMap struct {
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procNames map[processName]process
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mu sync.Mutex
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}
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func newProcsMap() *procsMap {
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cM := procsMap{
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procNames: make(map[processName]process),
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}
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return &cM
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}
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// ----------------------
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// Start all the subscriber processes.
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// Takes an initial process as it's input. All processes
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// will be tied to this single process's context.
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func (p *processes) Start(proc process) {
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// Set the context for the initial process.
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proc.ctx = p.ctx
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// --- Subscriber services that can be started via flags
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{
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log.Printf("Starting REQOpProcessList subscriber: %#v\n", proc.node)
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sub := newSubject(REQOpProcessList, string(proc.node))
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proc := newProcess(proc.ctx, p.metrics, proc.natsConn, p, proc.toRingbufferCh, proc.configuration, sub, processKindSubscriber, nil, p.Signatures)
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go proc.spawnWorker(proc.processes, proc.natsConn)
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}
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{
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log.Printf("Starting REQOpProcessStart subscriber: %#v\n", proc.node)
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sub := newSubject(REQOpProcessStart, string(proc.node))
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proc := newProcess(proc.ctx, p.metrics, proc.natsConn, p, proc.toRingbufferCh, proc.configuration, sub, processKindSubscriber, nil, p.Signatures)
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go proc.spawnWorker(proc.processes, proc.natsConn)
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}
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{
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log.Printf("Starting REQOpProcessStop subscriber: %#v\n", proc.node)
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sub := newSubject(REQOpProcessStop, string(proc.node))
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proc := newProcess(proc.ctx, p.metrics, proc.natsConn, p, proc.toRingbufferCh, proc.configuration, sub, processKindSubscriber, nil, p.Signatures)
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go proc.spawnWorker(proc.processes, proc.natsConn)
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}
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// Start a subscriber for textLogging messages
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if proc.configuration.StartSubREQToFileAppend {
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proc.startup.subREQToFileAppend(proc)
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}
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// Start a subscriber for text to file messages
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if proc.configuration.StartSubREQToFile {
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proc.startup.subREQToFile(proc)
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}
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// Start a subscriber for text to file messages
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if proc.configuration.StartSubREQToFileNACK {
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proc.startup.subREQToFileNACK(proc)
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}
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// Start a subscriber for reading file to copy
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if proc.configuration.StartSubREQCopyFileFrom {
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proc.startup.subREQCopyFileFrom(proc)
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}
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// Start a subscriber for writing copied file to disk
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if proc.configuration.StartSubREQCopyFileTo {
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proc.startup.subREQCopyFileTo(proc)
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}
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// Start a subscriber for Hello messages
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if proc.configuration.StartSubREQHello {
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proc.startup.subREQHello(proc)
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}
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if proc.configuration.StartSubREQErrorLog {
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// Start a subscriber for REQErrorLog messages
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proc.startup.subREQErrorLog(proc)
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}
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// Start a subscriber for Ping Request messages
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if proc.configuration.StartSubREQPing {
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proc.startup.subREQPing(proc)
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}
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// Start a subscriber for REQPong messages
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if proc.configuration.StartSubREQPong {
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proc.startup.subREQPong(proc)
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}
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// Start a subscriber for REQCliCommand messages
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if proc.configuration.StartSubREQCliCommand {
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proc.startup.subREQCliCommand(proc)
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}
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// Start a subscriber for CLICommandReply messages
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if proc.configuration.StartSubREQToConsole {
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proc.startup.subREQToConsole(proc)
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}
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// Start a subscriber for CLICommandReply messages
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if proc.configuration.EnableTUI {
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proc.startup.subREQTuiToConsole(proc)
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}
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if proc.configuration.StartPubREQHello != 0 {
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proc.startup.pubREQHello(proc)
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}
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// Start a subscriber for Http Get Requests
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if proc.configuration.StartSubREQHttpGet {
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proc.startup.subREQHttpGet(proc)
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}
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if proc.configuration.StartSubREQHttpGetScheduled {
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proc.startup.subREQHttpGetScheduled(proc)
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}
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if proc.configuration.StartSubREQTailFile {
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proc.startup.subREQTailFile(proc)
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}
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if proc.configuration.StartSubREQCliCommandCont {
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proc.startup.subREQCliCommandCont(proc)
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}
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if proc.configuration.StartSubREQRelay {
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proc.startup.subREQRelay(proc)
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}
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proc.startup.subREQRelayInitial(proc)
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proc.startup.subREQToSocket(proc)
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proc.startup.subREQPublicKey(proc)
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}
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// Stop all subscriber processes.
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func (p *processes) Stop() {
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log.Printf("info: canceling all subscriber processes...\n")
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p.cancel()
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p.wg.Wait()
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log.Printf("info: done canceling all subscriber processes.\n")
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}
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// ---------------------------------------------------------------------------------------
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// Startup holds all the startup methods for subscribers.
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type startup struct {
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metrics *metrics
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Signatures *signatures
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}
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func newStartup(metrics *metrics, signatures *signatures) *startup {
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s := startup{metrics: metrics, Signatures: signatures}
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return &s
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}
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func (s startup) subREQHttpGet(p process) {
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log.Printf("Starting Http Get subscriber: %#v\n", p.node)
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sub := newSubject(REQHttpGet, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, s.Signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQHttpGetScheduled(p process) {
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log.Printf("Starting Http Get Scheduled subscriber: %#v\n", p.node)
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sub := newSubject(REQHttpGetScheduled, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, s.Signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) pubREQHello(p process) {
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log.Printf("Starting Hello Publisher: %#v\n", p.node)
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sub := newSubject(REQHello, p.configuration.CentralNodeName)
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindPublisher, nil, s.Signatures)
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// Define the procFunc to be used for the process.
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proc.procFunc = func(ctx context.Context, procFuncCh chan Message) error {
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ticker := time.NewTicker(time.Second * time.Duration(p.configuration.StartPubREQHello))
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for {
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d := fmt.Sprintf("Hello from %v\n", p.node)
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m := Message{
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FileName: "hello.log",
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Directory: "hello-messages",
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ToNode: Node(p.configuration.CentralNodeName),
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FromNode: Node(p.node),
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Data: []byte(d),
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Method: REQHello,
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ACKTimeout: 10,
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Retries: 1,
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}
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sam, err := newSubjectAndMessage(m)
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if err != nil {
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// In theory the system should drop the message before it reaches here.
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p.processes.errorKernel.errSend(p, m, err)
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log.Printf("error: ProcessesStart: %v\n", err)
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}
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proc.toRingbufferCh <- []subjectAndMessage{sam}
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select {
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case <-ticker.C:
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case <-ctx.Done():
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er := fmt.Errorf("info: stopped handleFunc for: publisher %v", proc.subject.name())
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// sendErrorLogMessage(proc.toRingbufferCh, proc.node, er)
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log.Printf("%v\n", er)
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return nil
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}
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}
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}
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQToConsole(p process) {
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log.Printf("Starting Text To Console subscriber: %#v\n", p.node)
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sub := newSubject(REQToConsole, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQTuiToConsole(p process) {
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log.Printf("Starting Tui To Console subscriber: %#v\n", p.node)
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sub := newSubject(REQTuiToConsole, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQCliCommand(p process) {
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log.Printf("Starting CLICommand Request subscriber: %#v\n", p.node)
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sub := newSubject(REQCliCommand, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQPong(p process) {
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log.Printf("Starting Pong subscriber: %#v\n", p.node)
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sub := newSubject(REQPong, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQPing(p process) {
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log.Printf("Starting Ping Request subscriber: %#v\n", p.node)
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sub := newSubject(REQPing, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQErrorLog(p process) {
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log.Printf("Starting REQErrorLog subscriber: %#v\n", p.node)
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sub := newSubject(REQErrorLog, "errorCentral")
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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// subREQHello is the handler that is triggered when we are receiving a hello
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// message. To keep the state of all the hello's received from nodes we need
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// to also start a procFunc that will live as a go routine tied to this process,
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// where the procFunc will receive messages from the handler when a message is
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// received, the handler will deliver the message to the procFunc on the
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// proc.procFuncCh, and we can then read that message from the procFuncCh in
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// the procFunc running.
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func (s startup) subREQHello(p process) {
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log.Printf("Starting Hello subscriber: %#v\n", p.node)
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sub := newSubject(REQHello, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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// The reason for running the say hello subscriber as a procFunc is that
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// a handler are not able to hold state, and we need to hold the state
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// of the nodes we've received hello's from in the sayHelloNodes map,
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// which is the information we pass along to generate metrics.
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proc.procFunc = func(ctx context.Context, procFuncCh chan Message) error {
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sayHelloNodes := make(map[Node]struct{})
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for {
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// Receive a copy of the message sent from the method handler.
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var m Message
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select {
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case m = <-procFuncCh:
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case <-ctx.Done():
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er := fmt.Errorf("info: stopped handleFunc for: subscriber %v", proc.subject.name())
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// sendErrorLogMessage(proc.toRingbufferCh, proc.node, er)
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log.Printf("%v\n", er)
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return nil
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}
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// Add an entry for the node in the map
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sayHelloNodes[m.FromNode] = struct{}{}
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// update the prometheus metrics
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s.metrics.promHelloNodesTotal.Set(float64(len(sayHelloNodes)))
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s.metrics.promHelloNodesContactLast.With(prometheus.Labels{"nodeName": string(m.FromNode)}).SetToCurrentTime()
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}
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}
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQToFile(p process) {
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log.Printf("Starting text to file subscriber: %#v\n", p.node)
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sub := newSubject(REQToFile, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQToFileNACK(p process) {
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log.Printf("Starting text to file subscriber: %#v\n", p.node)
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sub := newSubject(REQToFileNACK, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQCopyFileFrom(p process) {
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log.Printf("Starting copy file from subscriber: %#v\n", p.node)
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sub := newSubject(REQCopyFileFrom, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQCopyFileTo(p process) {
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log.Printf("Starting copy file to subscriber: %#v\n", p.node)
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sub := newSubject(REQCopyFileTo, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQToFileAppend(p process) {
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log.Printf("Starting text logging subscriber: %#v\n", p.node)
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sub := newSubject(REQToFileAppend, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQTailFile(p process) {
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log.Printf("Starting tail log files subscriber: %#v\n", p.node)
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sub := newSubject(REQTailFile, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQCliCommandCont(p process) {
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log.Printf("Starting cli command with continous delivery: %#v\n", p.node)
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sub := newSubject(REQCliCommandCont, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQRelay(p process) {
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nodeWithRelay := fmt.Sprintf("*.%v", p.node)
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log.Printf("Starting Relay: %#v\n", nodeWithRelay)
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sub := newSubject(REQRelay, string(nodeWithRelay))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQRelayInitial(p process) {
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log.Printf("Starting Relay Initial: %#v\n", p.node)
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sub := newSubject(REQRelayInitial, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQToSocket(p process) {
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log.Printf("Starting write to socket subscriber: %#v\n", p.node)
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sub := newSubject(REQToSocket, string(p.node))
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proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
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go proc.spawnWorker(p.processes, p.natsConn)
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}
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func (s startup) subREQPublicKey(p process) {
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log.Printf("Starting get Public Key subscriber: %#v\n", p.node)
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|
sub := newSubject(REQPublicKey, string(p.node))
|
|
proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, p.signatures)
|
|
|
|
go proc.spawnWorker(p.processes, p.natsConn)
|
|
}
|
|
|
|
// ---------------------------------------------------------------
|
|
|
|
// Print the content of the processes map.
|
|
func (p *processes) printProcessesMap() {
|
|
log.Printf("*** Output of processes map :\n")
|
|
|
|
{
|
|
p.active.mu.Lock()
|
|
|
|
for pName, proc := range p.active.procNames {
|
|
log.Printf("* proc - pub/sub: %v, procName in map: %v , id: %v, subject: %v\n", proc.processKind, pName, proc.processID, proc.subject.name())
|
|
}
|
|
|
|
p.metrics.promProcessesTotal.Set(float64(len(p.active.procNames)))
|
|
|
|
p.active.mu.Unlock()
|
|
}
|
|
|
|
}
|