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Code Issues Releases Wiki Activity

Merge pull request #1562 from SvenDowideit/make-upgrade-more-robust

Browse Source 
Improve and test install and upgrade robustness
This commit is contained in:
Sven Dowideit 2017-01-30 21:55:19 +10:00 committed by GitHub
commit 06bb106199
11 changed files with 1096 additions and 139 deletions
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125
cmd/control/install.go
View File

@ -15,6 +15,7 @@ import (
"github.com/rancher/os/log"
"github.com/codegangsta/cli"
version "github.com/hashicorp/go-version"
"github.com/rancher/os/cmd/control/install"
"github.com/rancher/os/cmd/power"
"github.com/rancher/os/config"
@ -165,11 +166,23 @@ func runInstall(image, installType, cloudConfig, device, kappend string, force,
diskType = "gpt"
}
// Versions before 0.8.0-rc2 use the old calling convention (from the lay-down-os shell script)
// TODO: This needs fixing before 0.8.0 GA's - actually parse the version string, and use for any numbered version before 0.8.0-rc3
// Versions before 0.8.0-rc3 use the old calling convention (from the lay-down-os shell script)
imageVersion := strings.TrimPrefix(image, "rancher/os:")
if imageVersion == "v0.7.1" || imageVersion == "v0.7.0" || imageVersion == "v0.5.0" {
log.Infof("user specified to install 0.7.0/0.7.1: %s", image)
installVer, err := version.NewVersion("999.999")
if strings.HasPrefix(imageVersion, "v") {
installVer, err = version.NewVersion(strings.TrimPrefix(imageVersion, "v"))
if err != nil {
log.Errorf("ERROR parsing %s: %s", imageVersion, err)
os.Exit(1)
}
}
newInstallerVersion, err := version.NewVersion("0.8.0-rc3")
if err != nil {
log.Errorf("ERROR parsing %s: %s", "0.8.0-rc3", err)
os.Exit(1)
}
if installVer.LessThan(newInstallerVersion) {
log.Infof("user specified to install pre v0.8.0: %s", image)
imageVersion = strings.Replace(imageVersion, "-", ".", -1)
vArray := strings.Split(imageVersion, ".")
v, _ := strconv.ParseFloat(vArray[0]+"."+vArray[1], 32)
@ -207,7 +220,7 @@ func runInstall(image, installType, cloudConfig, device, kappend string, force,
if !isoinstallerloaded {
log.Infof("start !isoinstallerloaded")
if _, err := os.Stat("/dist/initrd"); os.IsNotExist(err) {
if _, err := os.Stat("/dist/initrd-" + config.Version); os.IsNotExist(err) {
if err = mountBootIso(); err != nil {
log.Debugf("mountBootIso error %s", err)
} else {
@ -224,8 +237,11 @@ func runInstall(image, installType, cloudConfig, device, kappend string, force,
useIso = true
// now use the installer image
cfg := config.LoadConfig()
// TODO: fix the fullinstaller Dockerfile to use the ${VERSION}${SUFFIX}
image = cfg.Rancher.Upgrade.Image + "-installer" + ":latest"
if image == cfg.Rancher.Upgrade.Image+":"+config.Version+config.Suffix {
// TODO: fix the fullinstaller Dockerfile to use the ${VERSION}${SUFFIX}
image = cfg.Rancher.Upgrade.Image + "-installer" + ":latest"
}
}
}
// TODO: also poke around looking for the /boot/vmlinuz and initrd...
@ -312,7 +328,7 @@ func runInstall(image, installType, cloudConfig, device, kappend string, force,
}
}
err := layDownOS(image, installType, cloudConfig, device, kappend, kexec)
err = layDownOS(image, installType, cloudConfig, device, kappend, kexec)
if err != nil {
log.Errorf("error layDownOS %s", err)
return err
@ -833,37 +849,42 @@ func upgradeBootloader(device, baseName, bootDir, diskType string) error {
}
syslinuxDir := filepath.Join(baseName, bootDir+"syslinux")
backupSyslinuxDir := filepath.Join(baseName, bootDir+"syslinux_backup")
if err := os.Rename(syslinuxDir, backupSyslinuxDir); err != nil {
log.Errorf("Rename(%s, %s): %s", syslinuxDir, backupSyslinuxDir, err)
return err
}
//mv the old syslinux into linux-previous.cfg
oldSyslinux, err := ioutil.ReadFile(filepath.Join(backupSyslinuxDir, "syslinux.cfg"))
if err != nil {
log.Errorf("read(%s / syslinux.cfg): %s", backupSyslinuxDir, err)
// it seems that v0.5.0 didn't have a syslinux dir, while 0.7 does
if _, err := os.Stat(syslinuxDir); !os.IsNotExist(err) {
backupSyslinuxDir := filepath.Join(baseName, bootDir+"syslinux_backup")
if err := os.Rename(syslinuxDir, backupSyslinuxDir); err != nil {
log.Infof("error Rename(%s, %s): %s", syslinuxDir, backupSyslinuxDir, err)
} else {
log.Errorf("Rename(%s, %s): ok", syslinuxDir, backupSyslinuxDir)
//mv the old syslinux into linux-previous.cfg
oldSyslinux, err := ioutil.ReadFile(filepath.Join(backupSyslinuxDir, "syslinux.cfg"))
if err != nil {
log.Infof("error read(%s / syslinux.cfg): %s", backupSyslinuxDir, err)
} else {
log.Infof("read(%s / syslinux.cfg): ok", backupSyslinuxDir)
cfg := string(oldSyslinux)
//DEFAULT RancherOS-current
//
//LABEL RancherOS-current
// LINUX ../vmlinuz-v0.7.1-rancheros
// APPEND rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=tty0 rancher.password=rancher
// INITRD ../initrd-v0.7.1-rancheros
return err
}
cfg := string(oldSyslinux)
//DEFAULT RancherOS-current
//
//LABEL RancherOS-current
// LINUX ../vmlinuz-v0.7.1-rancheros
// APPEND rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=tty0 rancher.password=rancher
// INITRD ../initrd-v0.7.1-rancheros
cfg = strings.Replace(cfg, "current", "previous", -1)
// TODO consider removing the APPEND line - as the global.cfg should have the same result
ioutil.WriteFile(filepath.Join(baseName, bootDir, "linux-current.cfg"), []byte(cfg), 0644)
cfg = strings.Replace(cfg, "current", "previous", -1)
// TODO consider removing the APPEND line - as the global.cfg should have the same result
ioutil.WriteFile(filepath.Join(baseName, bootDir, "linux-current.cfg"), []byte(cfg), 0644)
lines := strings.Split(cfg, "\n")
for _, line := range lines {
line = strings.TrimSpace(line)
if strings.HasPrefix(line, "APPEND") {
// TODO: need to append any extra's the user specified
ioutil.WriteFile(filepath.Join(baseName, bootDir, "global.cfg"), []byte(cfg), 0644)
break
lines := strings.Split(cfg, "\n")
for _, line := range lines {
line = strings.TrimSpace(line)
if strings.HasPrefix(line, "APPEND") {
// TODO: need to append any extra's the user specified
log.Infof("wrote (%s) to global.cfg", []byte(cfg))
ioutil.WriteFile(filepath.Join(baseName, bootDir, "global.cfg"), []byte(cfg), 0644)
break
}
}
}
}
}
@ -918,8 +939,11 @@ func installSyslinux(device, baseName, bootDir, diskType string) error {
return err
}
}
if err := os.MkdirAll(filepath.Join(baseName, bootDir+"syslinux"), 0755); err != nil {
return err
sysLinuxDir := filepath.Join(baseName, bootDir, "syslinux")
if err := os.MkdirAll(sysLinuxDir, 0755); err != nil {
log.Errorf("MkdirAll(%s)): %s", sysLinuxDir, err)
//return err
}
//cp /usr/lib/syslinux/modules/bios/* ${baseName}/${bootDir}syslinux
@ -928,17 +952,17 @@ func installSyslinux(device, baseName, bootDir, diskType string) error {
if file.IsDir() {
continue
}
if err := dfs.CopyFile(filepath.Join("/usr/share/syslinux/", file.Name()), filepath.Join(baseName, bootDir, "syslinux"), file.Name()); err != nil {
if err := dfs.CopyFile(filepath.Join("/usr/share/syslinux/", file.Name()), sysLinuxDir, file.Name()); err != nil {
log.Errorf("copy syslinux: %s", err)
return err
}
}
//extlinux --install ${baseName}/${bootDir}syslinux
cmd := exec.Command("extlinux", "--install", filepath.Join(baseName, bootDir+"syslinux"))
cmd := exec.Command("extlinux", "--install", sysLinuxDir)
if device == "/dev/" {
//extlinux --install --raid ${baseName}/${bootDir}syslinux
cmd = exec.Command("extlinux", "--install", "--raid", filepath.Join(baseName, bootDir+"syslinux"))
cmd = exec.Command("extlinux", "--install", "--raid", sysLinuxDir)
}
//cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
log.Debugf("Run(%v)", cmd)
@ -972,21 +996,24 @@ func installRancher(baseName, bootDir, VERSION, DIST, kappend string) error {
}
if err := dfs.CopyFile(filepath.Join(DIST, file.Name()), filepath.Join(baseName, bootDir), file.Name()); err != nil {
log.Errorf("copy %s: %s", file.Name(), err)
return err
//return err
}
log.Debugf("copied %s to %s as %s", filepath.Join(DIST, file.Name()), filepath.Join(baseName, bootDir), file.Name())
}
// the general INCLUDE syslinuxcfg
if err := dfs.CopyFile(filepath.Join(DIST, "isolinux", "isolinux.cfg"), filepath.Join(baseName, bootDir, "syslinux"), "syslinux.cfg"); err != nil {
log.Errorf("copy %s: %s", "syslinux.cfg", err)
return err
log.Errorf("copy global syslinux.cfgS%s: %s", "syslinux.cfg", err)
//return err
}
// The global.cfg INCLUDE - useful for over-riding the APPEND line
err := ioutil.WriteFile(filepath.Join(filepath.Join(baseName, bootDir), "global.cfg"), []byte("APPEND "+kappend), 0644)
if err != nil {
log.Errorf("write (%s) %s", "global.cfg", err)
return err
globalFile := filepath.Join(filepath.Join(baseName, bootDir), "global.cfg")
if _, err := os.Stat(globalFile); !os.IsNotExist(err) {
err := ioutil.WriteFile(globalFile, []byte("APPEND "+kappend), 0644)
if err != nil {
log.Errorf("write (%s) %s", "global.cfg", err)
return err
}
}
return nil
}

12
tests/common_test.go Normal file → Executable file
View File

@ -184,3 +184,15 @@ func (s *QemuSuite) LoadInstallerImage(c *C) {
cmd.Stderr = os.Stderr
c.Assert(cmd.Run(), IsNil)
}
func (s *QemuSuite) PullAndLoadInstallerImage(c *C, image string) {
cmd := exec.Command("sh", "-c", fmt.Sprintf("docker pull %s", image))
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
c.Assert(cmd.Run(), IsNil)
cmd = exec.Command("sh", "-c", fmt.Sprintf("docker save %s | ../scripts/ssh --qemu sudo system-docker load", image))
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
c.Assert(cmd.Run(), IsNil)
}

70
tests/installer_test.go
View File

@ -80,73 +80,3 @@ sync
// TEST parted output? (gpt non-uefi == legacy_boot)
s.Stop(c)
}
func (s *QemuSuite) TestUpgradeFromImage(c *C) {
// ./scripts/run --no-format --append "rancher.debug=true" --iso --fresh
//TODO: --fresh isn't giving us a new disk why? (that's what the parted print is for atm)
runArgs := []string{
"--iso",
"--fresh",
}
version := ""
{
s.RunQemuWith(c, runArgs...)
version = s.CheckOutput(c, version, Not(Equals), "sudo ros -v")
fmt.Printf("running %s", version)
s.CheckCall(c, "sudo uname -a")
//TODO: detect "last release, and install that
s.CheckCall(c, `
echo "---------------------------------- generic"
set -ex
sudo parted /dev/vda print
echo "ssh_authorized_keys:" > config.yml
echo " - $(cat /home/rancher/.ssh/authorized_keys)" >> config.yml
sudo ros install --force --no-reboot --device /dev/vda -c config.yml -i rancher/os:v0.7.1 --append "console=ttyS0 rancher.password=rancher"
#TODO copy installer image, new ros, and new kernel to HD, so we can fake things up next time? (or have next boot from HD, but have the iso available..)
sudo mkdir -p /bootiso
sudo mount -t iso9660 /dev/sr0 /bootiso/
sudo mount /dev/vda1 /mnt/
sudo mkdir -p /mnt/rancher-installer/build/
sudo cp /bootiso/rancheros/installer.tar.gz /mnt/rancher-installer/build/
sudo cp /bootiso/rancheros/Dockerfile.amd64 /mnt/rancher-installer/build/
sudo cp -r /bootiso/boot /mnt/rancher-installer/build/
sudo cp /bin/ros /mnt/rancher-installer/build/
sync
`)
time.Sleep(500 * time.Millisecond)
s.Stop(c)
}
{
runArgs = []string{
"--boothd",
}
s.RunQemuWith(c, runArgs...)
s.CheckOutput(c, "ros version v0.7.1\n", Equals, "sudo ros -v")
s.CheckCall(c, "sudo uname -a")
// load the installer.tar.gz, get the other install files into an image, and runit.
s.CheckCall(c, `sudo system-docker run --name builder -dt --volumes-from system-volumes -v /:/host alpine sh
sudo system-docker exec -t builder ln -s /host/rancher-installer/build/ros /bin/system-docker
sudo system-docker exec -t builder system-docker load -i /host/rancher-installer/build/installer.tar.gz
sudo system-docker exec -t builder system-docker build -t qwer -f /host/rancher-installer/build/Dockerfile.amd64 /host/rancher-installer/build
sudo ros os upgrade -i qwer --no-reboot -f --append "console=tty0 console=ttyS0 rancher.password=rancher"
sync
`)
time.Sleep(500 * time.Millisecond)
s.Stop(c)
}
// ./scripts/run --no-format --append "rancher.debug=true"
runArgs = []string{
"--boothd",
}
s.RunQemuWith(c, runArgs...)
s.CheckOutput(c, version, Equals, "sudo ros -v")
s.CheckCall(c, "sudo uname -a")
s.Stop(c)
}

94
tests/upgrade_test.go Normal file → Executable file
View File

@ -2,28 +2,82 @@ package integration
import (
"fmt"
"time"
"strings"
. "gopkg.in/check.v1"
)
// DisabledTestUpgrade, The new go based installer code breaks downgrading from itself to a previous version
// because 0.8.0 now uses syslinx and a set of syslinux.cfg files, whereas before that , we used grub and
// assumed that there was only one kernel&initrd
// see installer_test.go for more tests
func (s *QemuSuite) DisabledTestUpgrade(c *C) {
s.RunQemuInstalled(c)
s.CheckCall(c, `
set -ex
sudo ros os upgrade -i rancher/os:v0.5.0 --force --no-reboot`)
s.Reboot(c)
s.CheckCall(c, "sudo ros -v | grep v0.5.0")
s.LoadInstallerImage(c)
s.CheckCall(c, fmt.Sprintf("sudo ros os upgrade -i rancher/os:%s%s --force --no-reboot", Version, Suffix))
s.Reboot(c)
s.CheckCall(c, fmt.Sprintf("sudo ros -v | grep %s", Version))
func (s *QemuSuite) TestUpgrade050(c *C) {
s.commonTestCode(c, "v0.5.0", "debian")
}
func (s *QemuSuite) TestUpgrade070(c *C) {
s.commonTestCode(c, "v0.7.0", "default")
}
func (s *QemuSuite) TestUpgrade071(c *C) {
s.commonTestCode(c, "v0.7.1", "ubuntu")
}
func (s *QemuSuite) TestUpgrade080rc1(c *C) {
s.commonTestCode(c, "v0.8.0-rc1", "alpine")
}
func (s *QemuSuite) TestUpgrade080rc7(c *C) {
s.commonTestCode(c, "v0.8.0-rc7", "centos")
}
func (s *QemuSuite) commonTestCode(c *C, startWithVersion, console string) {
runArgs := []string{
"--iso",
"--fresh",
"--cloud-config",
"./tests/assets/test_12/cloud-config.yml",
}
version := ""
{
s.RunQemuWith(c, runArgs...)
version = s.CheckOutput(c, version, Not(Equals), "sudo ros -v")
version = strings.TrimSpace(strings.TrimPrefix(version, "ros version"))
c.Assert(Version, Equals, version)
fmt.Printf("installing %s", startWithVersion)
s.PullAndLoadInstallerImage(c, fmt.Sprintf("rancher/os:%s", startWithVersion))
//ADD a custom append line and make sure its kept in the upgraded version too
s.CheckCall(c, fmt.Sprintf(`
echo "---------------------------------- generic"
set -ex
echo "ssh_authorized_keys:" > config.yml
echo " - $(cat /home/rancher/.ssh/authorized_keys)" >> config.yml
sudo ros install --force --no-reboot --device /dev/vda -c config.yml --append rancher.password=rancher -i rancher/os:%s
sync
`, startWithVersion))
time.Sleep(500 * time.Millisecond)
s.Stop(c)
}
// ./scripts/run --no-format --append "rancher.debug=true"
runArgs = []string{
"--boothd",
}
s.RunQemuWith(c, runArgs...)
s.CheckOutput(c, "ros version "+startWithVersion+"\n", Equals, "sudo ros -v")
if console != "default" {
// Can't preload the startWithVersion console image, as some don't exist by that name - not sure how to approach that
//s.PullAndLoadInstallerImage(c, fmt.Sprintf("rancher/os-%sconsole:%s", console, startWithVersion))
// TODO: ouch. probably need to tag the dev / master version as latest cos this won't work
// Need to pull the image here - if we do it at boot, then the test will fail.
s.PullAndLoadInstallerImage(c, fmt.Sprintf("rancher/os-%sconsole:%s", console, "v0.8.0-rc3"))
s.CheckCall(c, fmt.Sprintf("sudo ros console enable %s", console))
}
s.LoadInstallerImage(c)
s.CheckCall(c, fmt.Sprintf("sudo ros os upgrade --no-reboot -i rancher/os:%s%s --force", Version, Suffix))
s.Reboot(c)
s.CheckOutput(c, "ros version "+Version+"\n", Equals, "sudo ros -v")
s.Stop(c)
}

1
trash.conf
View File

@ -26,6 +26,7 @@ github.com/godbus/dbus v3
github.com/golang/protobuf 8d92cf5fc15a4382f8964b08e1f42a75c0591aa3
github.com/gorilla/context 14f550f51a
github.com/gorilla/mux e444e69cbd
github.com/hashicorp/go-version e96d3840402619007766590ecea8dd7af1292276
github.com/imdario/mergo 0.2.1
github.com/j-keck/arping 4f4d2c8983a18e2c9c63a3f339bc9a998c4557bc
github.com/kless/term d57d9d2d5be197e12d9dee142d855470d83ce62f

11
vendor/github.com/hashicorp/go-version/.travis.yml generated vendored Normal file
View File

@ -0,0 +1,11 @@
language: go
go:
- 1.0
- 1.1
- 1.2
- 1.3
- 1.4
script:
- go test

354
vendor/github.com/hashicorp/go-version/LICENSE generated vendored Normal file
View File

@ -0,0 +1,354 @@
Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

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# Versioning Library for Go
[![Build Status](https://travis-ci.org/hashicorp/go-version.svg?branch=master)](https://travis-ci.org/hashicorp/go-version)
go-version is a library for parsing versions and version constraints,
and verifying versions against a set of constraints. go-version
can sort a collection of versions properly, handles prerelease/beta
versions, can increment versions, etc.
Versions used with go-version must follow [SemVer](http://semver.org/).
## Installation and Usage
Package documentation can be found on
[GoDoc](http://godoc.org/github.com/hashicorp/go-version).
Installation can be done with a normal `go get`:
```
$ go get github.com/hashicorp/go-version
```
#### Version Parsing and Comparison
```go
v1, err := version.NewVersion("1.2")
v2, err := version.NewVersion("1.5+metadata")
// Comparison example. There is also GreaterThan, Equal, and just
// a simple Compare that returns an int allowing easy >=, <=, etc.
if v1.LessThan(v2) {
fmt.Printf("%s is less than %s", v1, v2)
}
```
#### Version Constraints
```go
v1, err := version.NewVersion("1.2")
// Constraints example.
constraints, err := version.NewConstraint(">= 1.0, < 1.4")
if constraints.Check(v1) {
fmt.Printf("%s satisfies constraints %s", v1, constraints)
}
```
#### Version Sorting
```go
versionsRaw := []string{"1.1", "0.7.1", "1.4-beta", "1.4", "2"}
versions := make([]*version.Version, len(versionsRaw))
for i, raw := range versionsRaw {
v, _ := version.NewVersion(raw)
versions[i] = v
}
// After this, the versions are properly sorted
sort.Sort(version.Collection(versions))
```
## Issues and Contributing
If you find an issue with this library, please report an issue. If you'd
like, we welcome any contributions. Fork this library and submit a pull
request.

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package version
import (
"fmt"
"regexp"
"strings"
)
// Constraint represents a single constraint for a version, such as
// ">= 1.0".
type Constraint struct {
f constraintFunc
check *Version
original string
}
// Constraints is a slice of constraints. We make a custom type so that
// we can add methods to it.
type Constraints []*Constraint
type constraintFunc func(v, c *Version) bool
var constraintOperators map[string]constraintFunc
var constraintRegexp *regexp.Regexp
func init() {
constraintOperators = map[string]constraintFunc{
"": constraintEqual,
"=": constraintEqual,
"!=": constraintNotEqual,
">": constraintGreaterThan,
"<": constraintLessThan,
">=": constraintGreaterThanEqual,
"<=": constraintLessThanEqual,
"~>": constraintPessimistic,
}
ops := make([]string, 0, len(constraintOperators))
for k := range constraintOperators {
ops = append(ops, regexp.QuoteMeta(k))
}
constraintRegexp = regexp.MustCompile(fmt.Sprintf(
`^\s*(%s)\s*(%s)\s*$`,
strings.Join(ops, "|"),
VersionRegexpRaw))
}
// NewConstraint will parse one or more constraints from the given
// constraint string. The string must be a comma-separated list of
// constraints.
func NewConstraint(v string) (Constraints, error) {
vs := strings.Split(v, ",")
result := make([]*Constraint, len(vs))
for i, single := range vs {
c, err := parseSingle(single)
if err != nil {
return nil, err
}
result[i] = c
}
return Constraints(result), nil
}
// Check tests if a version satisfies all the constraints.
func (cs Constraints) Check(v *Version) bool {
for _, c := range cs {
if !c.Check(v) {
return false
}
}
return true
}
// Returns the string format of the constraints
func (cs Constraints) String() string {
csStr := make([]string, len(cs))
for i, c := range cs {
csStr[i] = c.String()
}
return strings.Join(csStr, ",")
}
// Check tests if a constraint is validated by the given version.
func (c *Constraint) Check(v *Version) bool {
return c.f(v, c.check)
}
func (c *Constraint) String() string {
return c.original
}
func parseSingle(v string) (*Constraint, error) {
matches := constraintRegexp.FindStringSubmatch(v)
if matches == nil {
return nil, fmt.Errorf("Malformed constraint: %s", v)
}
check, err := NewVersion(matches[2])
if err != nil {
return nil, err
}
return &Constraint{
f: constraintOperators[matches[1]],
check: check,
original: v,
}, nil
}
//-------------------------------------------------------------------
// Constraint functions
//-------------------------------------------------------------------
func constraintEqual(v, c *Version) bool {
return v.Equal(c)
}
func constraintNotEqual(v, c *Version) bool {
return !v.Equal(c)
}
func constraintGreaterThan(v, c *Version) bool {
return v.Compare(c) == 1
}
func constraintLessThan(v, c *Version) bool {
return v.Compare(c) == -1
}
func constraintGreaterThanEqual(v, c *Version) bool {
return v.Compare(c) >= 0
}
func constraintLessThanEqual(v, c *Version) bool {
return v.Compare(c) <= 0
}
func constraintPessimistic(v, c *Version) bool {
// If the version being checked is naturally less than the constraint, then there
// is no way for the version to be valid against the constraint
if v.LessThan(c) {
return false
}
// We'll use this more than once, so grab the length now so it's a little cleaner
// to write the later checks
cs := len(c.segments)
// If the version being checked has less specificity than the constraint, then there
// is no way for the version to be valid against the constraint
if cs > len(v.segments) {
return false
}
// Check the segments in the constraint against those in the version. If the version
// being checked, at any point, does not have the same values in each index of the
// constraints segments, then it cannot be valid against the constraint.
for i := 0; i < c.si-1; i++ {
if v.segments[i] != c.segments[i] {
return false
}
}
// Check the last part of the segment in the constraint. If the version segment at
// this index is less than the constraints segment at this index, then it cannot
// be valid against the constraint
if c.segments[cs-1] > v.segments[cs-1] {
return false
}
// If nothing has rejected the version by now, it's valid
return true
}

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package version
import (
"bytes"
"fmt"
"reflect"
"regexp"
"strconv"
"strings"
)
// The compiled regular expression used to test the validity of a version.
var versionRegexp *regexp.Regexp
// The raw regular expression string used for testing the validity
// of a version.
const VersionRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` +
`(-?([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
`?`
// Version represents a single version.
type Version struct {
metadata string
pre string
segments []int64
si int
}
func init() {
versionRegexp = regexp.MustCompile("^" + VersionRegexpRaw + "$")
}
// NewVersion parses the given version and returns a new
// Version.
func NewVersion(v string) (*Version, error) {
matches := versionRegexp.FindStringSubmatch(v)
if matches == nil {
return nil, fmt.Errorf("Malformed version: %s", v)
}
segmentsStr := strings.Split(matches[1], ".")
segments := make([]int64, len(segmentsStr))
si := 0
for i, str := range segmentsStr {
val, err := strconv.ParseInt(str, 10, 64)
if err != nil {
return nil, fmt.Errorf(
"Error parsing version: %s", err)
}
segments[i] = int64(val)
si++
}
// Even though we could support more than three segments, if we
// got less than three, pad it with 0s. This is to cover the basic
// default usecase of semver, which is MAJOR.MINOR.PATCH at the minimum
for i := len(segments); i < 3; i++ {
segments = append(segments, 0)
}
return &Version{
metadata: matches[7],
pre: matches[4],
segments: segments,
si: si,
}, nil
}
// Must is a helper that wraps a call to a function returning (*Version, error)
// and panics if error is non-nil.
func Must(v *Version, err error) *Version {
if err != nil {
panic(err)
}
return v
}
// Compare compares this version to another version. This
// returns -1, 0, or 1 if this version is smaller, equal,
// or larger than the other version, respectively.
//
// If you want boolean results, use the LessThan, Equal,
// or GreaterThan methods.
func (v *Version) Compare(other *Version) int {
// A quick, efficient equality check
if v.String() == other.String() {
return 0
}
segmentsSelf := v.Segments64()
segmentsOther := other.Segments64()
// If the segments are the same, we must compare on prerelease info
if reflect.DeepEqual(segmentsSelf, segmentsOther) {
preSelf := v.Prerelease()
preOther := other.Prerelease()
if preSelf == "" && preOther == "" {
return 0
}
if preSelf == "" {
return 1
}
if preOther == "" {
return -1
}
return comparePrereleases(preSelf, preOther)
}
// Get the highest specificity (hS), or if they're equal, just use segmentSelf length
lenSelf := len(segmentsSelf)
lenOther := len(segmentsOther)
hS := lenSelf
if lenSelf < lenOther {
hS = lenOther
}
// Compare the segments
// Because a constraint could have more/less specificity than the version it's
// checking, we need to account for a lopsided or jagged comparison
for i := 0; i < hS; i++ {
if i > lenSelf-1 {
// This means Self had the lower specificity
// Check to see if the remaining segments in Other are all zeros
if !allZero(segmentsOther[i:]) {
// if not, it means that Other has to be greater than Self
return -1
}
break
} else if i > lenOther-1 {
// this means Other had the lower specificity
// Check to see if the remaining segments in Self are all zeros -
if !allZero(segmentsSelf[i:]) {
//if not, it means that Self has to be greater than Other
return 1
}
break
}
lhs := segmentsSelf[i]
rhs := segmentsOther[i]
if lhs == rhs {
continue
} else if lhs < rhs {
return -1
}
// Otherwis, rhs was > lhs, they're not equal
return 1
}
// if we got this far, they're equal
return 0
}
func allZero(segs []int64) bool {
for _, s := range segs {
if s != 0 {
return false
}
}
return true
}
func comparePart(preSelf string, preOther string) int {
if preSelf == preOther {
return 0
}
// if a part is empty, we use the other to decide
if preSelf == "" {
_, notIsNumeric := strconv.ParseInt(preOther, 10, 64)
if notIsNumeric == nil {
return -1
}
return 1
}
if preOther == "" {
_, notIsNumeric := strconv.ParseInt(preSelf, 10, 64)
if notIsNumeric == nil {
return 1
}
return -1
}
if preSelf > preOther {
return 1
}
return -1
}
func comparePrereleases(v string, other string) int {
// the same pre release!
if v == other {
return 0
}
// split both pre releases for analyse their parts
selfPreReleaseMeta := strings.Split(v, ".")
otherPreReleaseMeta := strings.Split(other, ".")
selfPreReleaseLen := len(selfPreReleaseMeta)
otherPreReleaseLen := len(otherPreReleaseMeta)
biggestLen := otherPreReleaseLen
if selfPreReleaseLen > otherPreReleaseLen {
biggestLen = selfPreReleaseLen
}
// loop for parts to find the first difference
for i := 0; i < biggestLen; i = i + 1 {
partSelfPre := ""
if i < selfPreReleaseLen {
partSelfPre = selfPreReleaseMeta[i]
}
partOtherPre := ""
if i < otherPreReleaseLen {
partOtherPre = otherPreReleaseMeta[i]
}
compare := comparePart(partSelfPre, partOtherPre)
// if parts are equals, continue the loop
if compare != 0 {
return compare
}
}
return 0
}
// Equal tests if two versions are equal.
func (v *Version) Equal(o *Version) bool {
return v.Compare(o) == 0
}
// GreaterThan tests if this version is greater than another version.
func (v *Version) GreaterThan(o *Version) bool {
return v.Compare(o) > 0
}
// LessThan tests if this version is less than another version.
func (v *Version) LessThan(o *Version) bool {
return v.Compare(o) < 0
}
// Metadata returns any metadata that was part of the version
// string.
//
// Metadata is anything that comes after the "+" in the version.
// For example, with "1.2.3+beta", the metadata is "beta".
func (v *Version) Metadata() string {
return v.metadata
}
// Prerelease returns any prerelease data that is part of the version,
// or blank if there is no prerelease data.
//
// Prerelease information is anything that comes after the "-" in the
// version (but before any metadata). For example, with "1.2.3-beta",
// the prerelease information is "beta".
func (v *Version) Prerelease() string {
return v.pre
}
// Segments returns the numeric segments of the version as a slice of ints.
//
// This excludes any metadata or pre-release information. For example,
// for a version "1.2.3-beta", segments will return a slice of
// 1, 2, 3.
func (v *Version) Segments() []int {
segmentSlice := make([]int, len(v.segments))
for i, v := range v.segments {
segmentSlice[i] = int(v)
}
return segmentSlice
}
// Segments64 returns the numeric segments of the version as a slice of int64s.
//
// This excludes any metadata or pre-release information. For example,
// for a version "1.2.3-beta", segments will return a slice of
// 1, 2, 3.
func (v *Version) Segments64() []int64 {
return v.segments
}
// String returns the full version string included pre-release
// and metadata information.
func (v *Version) String() string {
var buf bytes.Buffer
fmtParts := make([]string, len(v.segments))
for i, s := range v.segments {
// We can ignore err here since we've pre-parsed the values in segments
str := strconv.FormatInt(s, 10)
fmtParts[i] = str
}
fmt.Fprintf(&buf, strings.Join(fmtParts, "."))
if v.pre != "" {
fmt.Fprintf(&buf, "-%s", v.pre)
}
if v.metadata != "" {
fmt.Fprintf(&buf, "+%s", v.metadata)
}
return buf.String()
}

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package version
// Collection is a type that implements the sort.Interface interface
// so that versions can be sorted.
type Collection []*Version
func (v Collection) Len() int {
return len(v)
}
func (v Collection) Less(i, j int) bool {
return v[i].LessThan(v[j])
}
func (v Collection) Swap(i, j int) {
v[i], v[j] = v[j], v[i]
}