0dbd2004ad
This splits most of the main logic from the cli logic so that they can be used independently, in particular for if we ever libify mgmt.
272 lines
7.3 KiB
Go
272 lines
7.3 KiB
Go
// Mgmt
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// Copyright (C) 2013-2016+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package mgmtmain
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import (
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"github.com/urfave/cli"
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)
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// run is the main run target.
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func run(c *cli.Context) error {
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obj := &Main{}
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if s := c.String("prefix"); c.IsSet("prefix") && s != "" {
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obj.Prefix = &s
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}
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obj.TmpPrefix = c.Bool("tmp-prefix")
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obj.AllowTmpPrefix = c.Bool("allow-tmp-prefix")
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if h := c.String("hostname"); c.IsSet("hostname") && h != "" {
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obj.Hostname = &h
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}
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if f := c.String("file"); c.IsSet("file") {
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obj.File = &f
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}
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if p := c.String("puppet"); c.IsSet("puppet") {
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obj.Puppet = &p
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}
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obj.PuppetConf = c.String("puppet-conf")
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obj.Remotes = c.StringSlice("remote")
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obj.NoWatch = c.Bool("no-watch")
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obj.Noop = c.Bool("noop")
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obj.Graphviz = c.String("graphviz")
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obj.GraphvizFilter = c.String("graphviz-filter")
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obj.ConvergedTimeout = c.Int("converged-timeout")
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obj.MaxRuntime = uint(c.Int("max-runtime"))
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obj.Seeds = c.StringSlice("seeds")
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obj.ClientURLs = c.StringSlice("client-urls")
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obj.ServerURLs = c.StringSlice("server-urls")
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obj.IdealClusterSize = c.Int("ideal-cluster-size")
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obj.NoServer = c.Bool("no-server")
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obj.CConns = uint16(c.Int("cconns"))
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obj.AllowInteractive = c.Bool("allow-interactive")
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obj.SSHPrivIDRsa = c.String("ssh-priv-id-rsa")
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obj.NoCaching = c.Bool("no-caching")
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obj.Depth = uint16(c.Int("depth"))
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if err := obj.Init(); err != nil {
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return err
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}
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// install the exit signal handler
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exit := make(chan struct{})
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defer close(exit)
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go func() {
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, os.Interrupt) // catch ^C
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//signal.Notify(signals, os.Kill) // catch signals
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signal.Notify(signals, syscall.SIGTERM)
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select {
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case sig := <-signals: // any signal will do
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if sig == os.Interrupt {
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log.Println("Interrupted by ^C")
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obj.Exit(nil)
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return
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}
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log.Println("Interrupted by signal")
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obj.Exit(fmt.Errorf("Killed by %v", sig))
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return
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case <-exit:
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return
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}
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}()
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if err := obj.Run(); err != nil {
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return err
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//return cli.NewExitError(err.Error(), 1) // TODO: ?
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//return cli.NewExitError("", 1) // TODO: ?
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}
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return nil
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}
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// CLI is the entry point for using mgmt normally from the CLI.
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func CLI(program, version string) error {
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// test for sanity
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if program == "" || version == "" {
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return fmt.Errorf("Program was not compiled correctly. Please see Makefile.")
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}
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app := cli.NewApp()
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app.Name = program
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app.Usage = "next generation config management"
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app.Version = version
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//app.Action = ... // without a default action, help runs
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app.Commands = []cli.Command{
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{
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Name: "run",
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Aliases: []string{"r"},
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Usage: "run",
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Action: run,
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "prefix",
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Usage: "specify a path to the working prefix directory",
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EnvVar: "MGMT_PREFIX",
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},
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cli.BoolFlag{
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Name: "tmp-prefix",
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Usage: "request a pseudo-random, temporary prefix to be used",
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},
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cli.BoolFlag{
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Name: "allow-tmp-prefix",
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Usage: "allow creation of a new temporary prefix if main prefix is unavailable",
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},
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// useful for testing multiple instances on same machine
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cli.StringFlag{
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Name: "hostname",
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Value: "",
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Usage: "hostname to use",
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},
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cli.StringFlag{
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Name: "code, c",
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Value: "",
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Usage: "code definition to run",
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},
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cli.StringFlag{
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Name: "file, f",
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Value: "",
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Usage: "graph definition to run",
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EnvVar: "MGMT_FILE",
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},
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cli.StringFlag{
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Name: "puppet, p",
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Value: "",
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Usage: "load graph from puppet, optionally takes a manifest or path to manifest file",
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},
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cli.StringFlag{
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Name: "puppet-conf",
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Value: "",
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Usage: "the path to an alternate puppet.conf file",
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},
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cli.StringSliceFlag{
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Name: "remote",
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Value: &cli.StringSlice{},
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Usage: "list of remote graph definitions to run",
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},
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cli.BoolFlag{
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Name: "no-watch",
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Usage: "do not update graph on watched graph definition file changes",
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},
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cli.BoolFlag{
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Name: "noop",
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Usage: "globally force all resources into no-op mode",
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},
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cli.StringFlag{
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Name: "graphviz, g",
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Value: "",
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Usage: "output file for graphviz data",
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},
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cli.StringFlag{
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Name: "graphviz-filter, gf",
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Value: "dot", // directed graph default
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Usage: "graphviz filter to use",
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},
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cli.IntFlag{
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Name: "converged-timeout, t",
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Value: -1,
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Usage: "exit after approximately this many seconds in a converged state",
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EnvVar: "MGMT_CONVERGED_TIMEOUT",
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},
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cli.IntFlag{
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Name: "max-runtime",
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Value: 0,
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Usage: "exit after a maximum of approximately this many seconds",
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EnvVar: "MGMT_MAX_RUNTIME",
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},
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// if empty, it will startup a new server
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cli.StringSliceFlag{
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Name: "seeds, s",
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Value: &cli.StringSlice{}, // empty slice
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Usage: "default etc client endpoint",
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EnvVar: "MGMT_SEEDS",
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},
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// port 2379 and 4001 are common
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cli.StringSliceFlag{
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Name: "client-urls",
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Value: &cli.StringSlice{},
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Usage: "list of URLs to listen on for client traffic",
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EnvVar: "MGMT_CLIENT_URLS",
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},
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// port 2380 and 7001 are common
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cli.StringSliceFlag{
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Name: "server-urls, peer-urls",
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Value: &cli.StringSlice{},
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Usage: "list of URLs to listen on for server (peer) traffic",
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EnvVar: "MGMT_SERVER_URLS",
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},
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cli.IntFlag{
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Name: "ideal-cluster-size",
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Value: -1,
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Usage: "ideal number of server peers in cluster; only read by initial server",
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EnvVar: "MGMT_IDEAL_CLUSTER_SIZE",
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},
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cli.BoolFlag{
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Name: "no-server",
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Usage: "do not let other servers peer with me",
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},
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cli.IntFlag{
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Name: "cconns",
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Value: 0,
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Usage: "number of maximum concurrent remote ssh connections to run; 0 for unlimited",
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EnvVar: "MGMT_CCONNS",
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},
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cli.BoolFlag{
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Name: "allow-interactive",
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Usage: "allow interactive prompting, such as for remote passwords",
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},
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cli.StringFlag{
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Name: "ssh-priv-id-rsa",
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Value: "~/.ssh/id_rsa",
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Usage: "default path to ssh key file, set empty to never touch",
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EnvVar: "MGMT_SSH_PRIV_ID_RSA",
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},
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cli.BoolFlag{
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Name: "no-caching",
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Usage: "don't allow remote caching of remote execution binary",
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},
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cli.IntFlag{
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Name: "depth",
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Hidden: true, // internal use only
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Value: 0,
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Usage: "specify depth in remote hierarchy",
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},
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},
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},
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}
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app.EnableBashCompletion = true
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return app.Run(os.Args)
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}
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