Adding Oracle Enterprise Linux provisioner

Fixes #1361
Fixes #3164
Corrected copy/paste typo in libmachine/provision/fedora_test.go
Preserve environment when performing yum update for proxy settings.

Signed-off-by: Eric A. Zarko <eric.zarko@oracle.com>

libmachine/provision/fedora_test.go

@@ -9,7 +9,7 @@ func TestFedoraGenerateYumRepoList(t *testing.T) {
 	info := &OsRelease{
 		ID: "fedora",
 	}
-	p := NewCentosProvisioner(nil)
+	p := NewFedoraProvisioner(nil)
 	p.SetOsReleaseInfo(info)
 
 	buf, err := generateYumRepoList(p)

libmachine/provision/oraclelinux.go

@@ -0,0 +1,25 @@
+package provision
+
+import (
+	"github.com/docker/machine/libmachine/drivers"
+)
+
+func init() {
+	Register("OracleLinux", &RegisteredProvisioner{
+		New: NewOracleLinuxProvisioner,
+	})
+}
+
+func NewOracleLinuxProvisioner(d drivers.Driver) Provisioner {
+	return &OracleLinuxProvisioner{
+		NewRedHatProvisioner("ol", d),
+	}
+}
+
+type OracleLinuxProvisioner struct {
+	*RedHatProvisioner
+}
+
+func (provisioner *OracleLinuxProvisioner) String() string {
+	return "ol"
+}

libmachine/provision/oraclelinux_test.go

@@ -0,0 +1,29 @@
+package provision
+
+import (
+	"regexp"
+	"testing"
+)
+
+func TestOracleLinuxGenerateYumRepoList(t *testing.T) {
+	info := &OsRelease{
+		ID:      "ol",
+		Version: "7.2",
+	}
+	p := NewOracleLinuxProvisioner(nil)
+	p.SetOsReleaseInfo(info)
+
+	buf, err := generateYumRepoList(p)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	m, err := regexp.MatchString(".*oraclelinux/7.*", buf.String())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !m {
+		t.Fatalf("expected match for oraclelinux/7")
+	}
+}

libmachine/provision/redhat.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"regexp"
 	"text/template"
 
 	"github.com/docker/machine/libmachine/auth"
@@ -39,6 +40,8 @@ LimitNPROC=1048576
 LimitCORE=infinity
 Environment={{range .EngineOptions.Env}}{{ printf "%q" . }} {{end}}
 `
+
+	majorVersionRE = regexp.MustCompile(`^(\d+)(\..*)?`)
 )
 
 type PackageListInfo struct {
@@ -168,7 +171,7 @@ func (provisioner *RedHatProvisioner) Provision(swarmOptions swarm.Options, auth
 	}
 
 	// update OS -- this is needed for libdevicemapper and the docker install
-	if _, err := provisioner.SSHCommand("sudo yum -y update"); err != nil {
+	if _, err := provisioner.SSHCommand("sudo -E yum -y update"); err != nil {
 		return err
 	}
 
@@ -246,6 +249,13 @@ func generateYumRepoList(provisioner Provisioner) (*bytes.Buffer, error) {
 	case "fedora":
 		packageListInfo.OsRelease = "fedora"
 		packageListInfo.OsReleaseVersion = "22"
+	case "ol":
+		packageListInfo.OsRelease = "oraclelinux"
+		v := majorVersionRE.FindStringSubmatch(releaseInfo.Version)
+		if v == nil {
+			return nil, fmt.Errorf("unable to determine major version of %s", releaseInfo.Version)
+		}
+		packageListInfo.OsReleaseVersion = v[1]
 	default:
 		return nil, ErrUnknownYumOsRelease
 	}