func SysInit() error {
cfg, err := config.LoadConfig()
if err != nil {
return err
}
_, err = config.ChainCfgFuncs(cfg,
loadImages,
func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
p, err := compose.GetProject(cfg, false)
if err != nil {
return cfg, err
}
return cfg, p.Up()
},
func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
syscall.Sync()
return cfg, nil
},
func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
log.Infof("RancherOS %s started", config.VERSION)
return cfg, nil
})
return err
}
func RunInit() error {
os.Setenv("PATH", "/sbin:/usr/sbin:/usr/bin")
if isInitrd() {
log.Debug("Booting off an in-memory filesystem")
// Magic setting to tell Docker to do switch_root and not pivot_root
os.Setenv("DOCKER_RAMDISK", "true")
} else {
log.Debug("Booting off a persistent filesystem")
}
initFuncs := []config.CfgFunc{
func(c *config.CloudConfig) (*config.CloudConfig, error) {
return c, dockerlaunch.PrepareFs(&mountConfig)
},
mountOem,
func(_ *config.CloudConfig) (*config.CloudConfig, error) {
cfg, err := config.LoadConfig()
if err != nil {
return cfg, err
}
if cfg.Rancher.Debug {
cfgString, err := config.Dump(false, false, true)
if err != nil {
log.WithFields(log.Fields{"err": err}).Error("Error serializing config")
} else {
log.Debugf("Config: %s", cfgString)
}
}
return cfg, nil
},
loadModules,
tryMountAndBootstrap,
func(_ *config.CloudConfig) (*config.CloudConfig, error) {
return config.LoadConfig()
},
loadModules,
sysInit,
}
cfg, err := config.ChainCfgFuncs(nil, initFuncs...)
if err != nil {
return err
}
launchConfig, args := getLaunchConfig(cfg, &cfg.Rancher.SystemDocker)
launchConfig.Fork = !cfg.Rancher.SystemDocker.Exec
log.Info("Launching System Docker")
_, err = dockerlaunch.LaunchDocker(launchConfig, config.DOCKER_BIN, args...)
if err != nil {
return err
}
return pidOne()
}
func bootstrap(cfg *config.CloudConfig) error {
log.Info("Launching Bootstrap Docker")
c, err := startDocker(cfg)
if err != nil {
return err
}
defer stopDocker(c)
_, err = config.ChainCfgFuncs(cfg,
loadImages,
runBootstrapContainers,
autoformat)
return err
}