Golang manager.NewPackageManager函数代码示例

func (s *prereqsSuite) SetUpTest(c *gc.C) {
	s.BaseSuite.SetUpTest(c)
	s.tmpdir = c.MkDir()
	s.testMongodPath = filepath.Join(s.tmpdir, "mongod")

	s.PatchEnvironment("PATH", s.tmpdir)

	s.PatchValue(&mongo.JujuMongodPath, "/somewhere/that/wont/exist")

	os.Setenv("JUJUTEST_LSB_RELEASE_ID", "Ubuntu")
	err := ioutil.WriteFile(filepath.Join(s.tmpdir, "lsb_release"), []byte(lsbrelease), 0777)
	c.Assert(err, jc.ErrorIsNil)

	// symlink $temp/dpkg-query to /bin/true, to
	// simulate package installation query responses.
	pm, err := testing.GetPackageManager()
	c.Assert(err, jc.ErrorIsNil)

	err = symlink.New("/bin/true", filepath.Join(s.tmpdir, pm.PackageQuery))
	c.Assert(err, jc.ErrorIsNil)
	s.PatchValue(&isPackageInstalled, func(pack string) bool {
		pacman, err := manager.NewPackageManager(series.HostSeries())
		c.Assert(err, jc.ErrorIsNil)
		return pacman.IsInstalled(pack)
	})
}

func satisfyPrerequisites(operatingsystem string) error {
	// CentOS is not currently supported by our mongo package.
	if operatingsystem == "centos7" {
		return errors.New("centos7 is still not suported by this upgrade")
	}

	pacman, err := manager.NewPackageManager(operatingsystem)
	if err != nil {
		return errors.Annotatef(err, "cannot obtain package manager for %q", operatingsystem)
	}

	if err := pacman.InstallPrerequisite(); err != nil {
		return err
	}

	if err := pacman.Install("juju-mongodb2.6"); err != nil {
		return errors.Annotate(err, "cannot install juju-mongodb2.6")
	}
	// JujuMongoPackage represents a version of mongo > 3.1 .
	if err := pacman.Install(mongo.JujuMongoPackage); err != nil {
		return errors.Annotatef(err, "cannot install %v", mongo.JujuMongoPackage)
	}
	if err := pacman.Install(mongo.JujuMongoToolsPackage); err != nil {
		return errors.Annotatef(err, "cannot install %v", mongo.JujuMongoToolsPackage)
	}
	return nil
}

// getPackageManager is a helper function which returns the
// package manager implementation for the current system.
func getPackageManager() (manager.PackageManager, error) {
	return manager.NewPackageManager(series.HostSeries())
}

// getPackageManager is a helper function which returns the
// package manager implementation for the current system.
func getPackageManager() (manager.PackageManager, error) {
	return manager.NewPackageManager(version.Current.Series)
}

// getPackageManager is a helper function which returns the
// package manager implementation for the current system.
func getPackageManager(series string) (manager.PackageManager, error) {
	return manager.NewPackageManager(series)
}

func installMongod(operatingsystem string, numaCtl bool) error {
	// fetch the packaging configuration manager for the current operating system.
	pacconfer, err := config.NewPackagingConfigurer(operatingsystem)
	if err != nil {
		return err
	}

	// fetch the package manager implementation for the current operating system.
	pacman, err := manager.NewPackageManager(operatingsystem)
	if err != nil {
		return err
	}

	// Only Quantal requires the PPA.
	if operatingsystem == "quantal" {
		// install python-software-properties:
		if err := pacman.InstallPrerequisite(); err != nil {
			return err
		}
		if err := pacman.AddRepository("ppa:juju/stable"); err != nil {
			return err
		}
	}
	// CentOS requires "epel-release" for the epel repo mongodb-server is in.
	if operatingsystem == "centos7" {
		// install epel-release
		if err := pacman.Install("epel-release"); err != nil {
			return err
		}
	}

	mongoPkg := packageForSeries(operatingsystem)

	pkgs := []string{mongoPkg}
	if numaCtl {
		pkgs = []string{mongoPkg, numaCtlPkg}
		logger.Infof("installing %s and %s", mongoPkg, numaCtlPkg)
	} else {
		logger.Infof("installing %s", mongoPkg)
	}

	for i, _ := range pkgs {
		// apply release targeting if needed.
		if pacconfer.IsCloudArchivePackage(pkgs[i]) {
			pkgs[i] = strings.Join(pacconfer.ApplyCloudArchiveTarget(pkgs[i]), " ")
		}

		if err := pacman.Install(pkgs[i]); err != nil {
			return err
		}
	}

	// Work around SELinux on centos7
	if operatingsystem == "centos7" {
		cmd := []string{"chcon", "-R", "-v", "-t", "mongod_var_lib_t", "/var/lib/juju/"}
		logger.Infof("running %s %v", cmd[0], cmd[1:])
		_, err = utils.RunCommand(cmd[0], cmd[1:]...)
		if err != nil {
			logger.Errorf("chcon failed to change file security context error %s", err)
			return err
		}

		cmd = []string{"semanage", "port", "-a", "-t", "mongod_port_t", "-p", "tcp", strconv.Itoa(environs.DefaultStatePort)}
		logger.Infof("running %s %v", cmd[0], cmd[1:])
		_, err = utils.RunCommand(cmd[0], cmd[1:]...)
		if err != nil {
			if !strings.Contains(err.Error(), "exit status 1") {
				logger.Errorf("semanage failed to provide access on port %d error %s", environs.DefaultStatePort, err)
				return err
			}
		}
	}

	return nil
}

func installMongod(operatingsystem string, numaCtl bool) error {
	// fetch the packaging configuration manager for the current operating system.
	pacconfer, err := config.NewPackagingConfigurer(operatingsystem)
	if err != nil {
		return err
	}

	// fetch the package manager implementation for the current operating system.
	pacman, err := manager.NewPackageManager(operatingsystem)
	if err != nil {
		return err
	}

	// CentOS requires "epel-release" for the epel repo mongodb-server is in.
	if operatingsystem == "centos7" {
		// install epel-release
		if err := pacman.Install("epel-release"); err != nil {
			return err
		}
	}

	mongoPkgs, fallbackPkgs := packagesForSeries(operatingsystem)

	if numaCtl {
		logger.Infof("installing %v and %s", mongoPkgs, numaCtlPkg)
		if err = installPackage(numaCtlPkg, pacconfer, pacman); err != nil {
			return errors.Trace(err)
		}
	} else {
		logger.Infof("installing %v", mongoPkgs)
	}

	for i := range mongoPkgs {
		if err = installPackage(mongoPkgs[i], pacconfer, pacman); err != nil {
			break
		}
	}
	if err != nil && len(fallbackPkgs) == 0 {
		return errors.Trace(err)
	}
	if err != nil {
		logger.Errorf("installing mongo failed: %v", err)
		logger.Infof("will try fallback packages %v", fallbackPkgs)
		for i := range fallbackPkgs {
			if err = installPackage(fallbackPkgs[i], pacconfer, pacman); err != nil {
				return errors.Trace(err)
			}
		}
	}

	// Work around SELinux on centos7
	if operatingsystem == "centos7" {
		cmd := []string{"chcon", "-R", "-v", "-t", "mongod_var_lib_t", "/var/lib/juju/"}
		logger.Infof("running %s %v", cmd[0], cmd[1:])
		_, err = utils.RunCommand(cmd[0], cmd[1:]...)
		if err != nil {
			logger.Errorf("chcon failed to change file security context error %s", err)
			return err
		}

		cmd = []string{"semanage", "port", "-a", "-t", "mongod_port_t", "-p", "tcp", strconv.Itoa(environs.DefaultStatePort)}
		logger.Infof("running %s %v", cmd[0], cmd[1:])
		_, err = utils.RunCommand(cmd[0], cmd[1:]...)
		if err != nil {
			if !strings.Contains(err.Error(), "exit status 1") {
				logger.Errorf("semanage failed to provide access on port %d error %s", environs.DefaultStatePort, err)
				return err
			}
		}
	}

	return nil
}

// Licensed under the AGPLv3, see LICENCE file for details.

package local

import (
	"github.com/juju/utils/packaging/manager"
	"github.com/juju/utils/proxy"
	"github.com/juju/utils/series"
)

// isPackageInstalled is a helper function which instantiates a new
// PackageManager for the current system and checks whether the given package is
// installed.
var isPackageInstalled = func(pack string) bool {
	// We know that there exists a package manager for this OS as the agent has
	// been bootstrapped.
	pacman, _ := manager.NewPackageManager(series.HostSeries())
	return pacman.IsInstalled(pack)
}

// detectPackageProxies is a helper function which instantiates a new
// PackageManager for the current system and checks for package manager proxy
// settings.
var detectPackageProxies = func() (proxy.Settings, error) {
	pacman, err := manager.NewPackageManager(series.HostSeries())
	if err != nil {
		return proxy.Settings{}, err
	}
	return pacman.GetProxySettings()
}