func step(client *http.Client, store *storage.Service, hostname string) {
glog.Info("About to read package list.")
// Read the old and new packages from their respective storage locations.
serverList, err := packages.InstalledForServer(client, store, hostname)
if err != nil {
glog.Errorf("Failed to retrieve remote package list: %s", err)
return
}
localList, err := packages.FromLocalFile(*installedPackagesFile)
if err != nil {
glog.Errorf("Failed to retrieve local package list: %s", err)
return
}
// Install any new or updated packages.
newPackages, installed := differences(serverList.Names, localList)
glog.Infof("New: %v, Installed: %v", newPackages, installed)
for _, name := range newPackages {
// If just an appname appears w/o a package name then that means
// that package hasn't been selected, so just skip it for now.
if len(strings.Split(name, "/")) == 1 {
continue
}
installed = append(installed, name)
if err := packages.ToLocalFile(installed, *installedPackagesFile); err != nil {
glog.Errorf("Failed to write local package list: %s", err)
continue
}
if err := packages.Install(client, store, name); err != nil {
glog.Errorf("Failed to install package %s: %s", name, err)
// Pop last name from 'installed' then rewrite the file since the
// install failed.
installed = installed[:len(installed)-1]
if err := packages.ToLocalFile(installed, *installedPackagesFile); err != nil {
glog.Errorf("Failed to rewrite local package list after install failure for %s: %s", name, err)
}
continue
}
// The pull application is special in that it's not restarted by the
// the postinstall script of the debian package, because that might kill
// pullg while it was updating itself. Instead pulld will just exit when
// it notices that it has been updated and count on systemd to restart it.
if containsPulld(newPackages) {
glog.Info("The pulld package has been updated, exiting to allow a restart.")
glog.Flush()
os.Exit(0)
}
}
}
func step(client *http.Client, store *storage.Service, hostname string) {
glog.Info("About to read package list.")
// Read the old and new packages from their respective storage locations.
serverList, err := packages.InstalledForServer(client, store, hostname)
if err != nil {
glog.Errorf("Failed to retrieve remote package list: %s", err)
return
}
localList, err := packages.FromLocalFile(*installedPackagesFile)
if err != nil {
glog.Errorf("Failed to retrieve local package list: %s", err)
return
}
// Install any new or updated packages.
newPackages, installed := differences(serverList.Names, localList)
glog.Infof("New: %v, Installed: %v", newPackages, installed)
for _, name := range newPackages {
// If just an appname appears w/o a package name then that means
// that package hasn't been selected, so just skip it for now.
if len(strings.Split(name, "/")) == 1 {
continue
}
installed = append(installed, name)
if err := packages.ToLocalFile(installed, *installedPackagesFile); err != nil {
glog.Errorf("Failed to write local package list: %s", err)
continue
}
if err := packages.Install(client, store, name); err != nil {
glog.Errorf("Failed to install package %s: %s", name, err)
// Pop last name from 'installed' then rewrite the file since the
// install failed.
installed = installed[:len(installed)-1]
if err := packages.ToLocalFile(installed, *installedPackagesFile); err != nil {
glog.Errorf("Failed to rewrite local package list after install failure for %s: %s", name, err)
}
continue
}
}
}
func main() {
if *hostname == "" {
var err error
*hostname, err = os.Hostname()
if err != nil {
// Never call glog before common.Init*.
os.Exit(1)
}
}
common.InitWithMetrics("pull."+*hostname, graphiteServer)
glog.Infof("Running with hostname: %s", *hostname)
client, err := auth.NewClient(*doOauth, *oauthCacheFile,
storage.DevstorageFull_controlScope,
compute.ComputeReadonlyScope)
if err != nil {
glog.Fatalf("Failed to create authenticated HTTP client: %s", err)
}
glog.Info("Got authenticated client.")
store, err := storage.New(client)
if err != nil {
glog.Fatalf("Failed to create storage service client: %s", err)
}
for _ = range time.Tick(time.Second * 15) {
before, err := filepath.Glob("/etc/monit/conf.d/*")
if err != nil {
glog.Errorf("Failed to list all monit config files: %s", err)
continue
}
glog.Info("About to read package list.")
// Read the old and new packages from their respective storage locations.
serverList, err := packages.InstalledForServer(client, store, *hostname)
if err != nil {
glog.Errorf("Failed to retrieve remote package list: %s", err)
continue
}
localList, err := packages.FromLocalFile(*installedPackagesFile)
if err != nil {
glog.Errorf("Failed to retrieve local package list: %s", err)
continue
}
glog.Info("Comparing against currently installed packages.")
// Install any new or updated packages.
newPackages, installedPackages := differences(serverList.Names, localList)
for _, p := range newPackages {
glog.Infof("New Package:%s", p)
}
for _, p := range installedPackages {
glog.Infof("Installed Package:%s", p)
}
save := false
for _, name := range newPackages {
// If just an appname appears w/o a packge name then that means
// that package hasn't been selected, so just skip it for now.
if len(strings.Split(name, "/")) == 1 {
continue
}
if err := packages.Install(client, store, name); err != nil {
glog.Errorf("Failed to install package %s: %s", name, err)
continue
}
installedPackages = append(installedPackages, name)
save = true
}
// Only write out the file if any new packages were installed.
if !save {
continue
}
if err := packages.ToLocalFile(installedPackages, *installedPackagesFile); err != nil {
glog.Errorf("Failed to write local package list: %s", err)
}
after, err := filepath.Glob("/etc/monit/conf.d/*")
if err != nil {
glog.Errorf("Failed to list all monit config files: %s", err)
continue
}
// Tell monit to reload if the name or number of files under /etc/monit/conf.d have changed.
if !util.SSliceEqual(before, after) {
cmd := exec.Command("sudo", "monit", "reload")
var out bytes.Buffer
cmd.Stdout = &out
if err := cmd.Run(); err != nil {
glog.Errorf("Failed to reload monit: %s", err)
glog.Errorf("Failed to reload monit (stdout): %s", out.String())
break
}
}
// The pull application is special and not monitored by monit to restart on
// timestamp changes because that might kill pull while it was updating
// itself. Instead pull will just exit when it notices that it has been
// updated and count on monit to restart pull.
if containsPull(newPackages) {
glog.Info("The pull package has been updated, exiting to allow a restart.")
os.Exit(0)
}
}
}