*: remove support for environment variables

The environment variables were originally added to make CI testing a
little easier, since the installer didn't support consumption of
provided assets (e.g. the install config). Now that the installer
supports consumption, there is no need for most of the environment
variables anymore. The variables have actually been confusing to users,
so their removal should simplify the mental model.

docs/dev/libvirt-howto.md

@@ -223,15 +223,6 @@ Set `TAGS` when building if you need `destroy cluster` support for libvirt; this
 TAGS=libvirt_destroy hack/build.sh
 ```
 
-To avoid being prompted repeatedly, you can set [environment variables](../user/environment-variables.md) to reflect your libvirt choices.  For example, selecting libvirt, setting [our earlier name choices](#pick-names), and telling both the installer and the machine-API operator to contact `libvirtd` at [the usual libvirt IP](#firewall), you can use:
-
-```sh
-export OPENSHIFT_INSTALL_PLATFORM=libvirt
-export OPENSHIFT_INSTALL_BASE_DOMAIN=tt.testing
-export OPENSHIFT_INSTALL_CLUSTER_NAME=test1
-export OPENSHIFT_INSTALL_LIBVIRT_URI=qemu+tcp://192.168.122.1/system
-```
-
 ## Cleanup
 
 If you compiled with `libvirt_destroy`, you can use:

pkg/asset/installconfig/aws/aws.go

@@ -2,7 +2,6 @@
 package aws
 
 import (
-	"encoding/json"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -112,23 +111,14 @@ func Platform() (*aws.Platform, error) {
 			}),
 			Transform: regionTransform,
 		},
-		"OPENSHIFT_INSTALL_AWS_REGION",
 	)
 	if err != nil {
 		return nil, err
 	}
 
-	userTags := map[string]string{}
-	if value, ok := os.LookupEnv("_CI_ONLY_STAY_AWAY_OPENSHIFT_INSTALL_AWS_USER_TAGS"); ok {
-		if err := json.Unmarshal([]byte(value), &userTags); err != nil {
-			return nil, errors.Wrapf(err, "_CI_ONLY_STAY_AWAY_OPENSHIFT_INSTALL_AWS_USER_TAGS contains invalid JSON: %s", value)
-		}
-	}
-
 	return &aws.Platform{
 		VPCCIDRBlock: defaultVPCCIDR,
 		Region:       region,
-		UserTags:     userTags,
 	}, nil
 }
 
@@ -141,7 +131,6 @@ func getCredentials() error {
 				Help:    "The AWS access key ID to use for installation (this is not your username).\nhttps://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html",
 			},
 		},
-		"",
 	)
 	if err != nil {
 		return err
@@ -155,7 +144,6 @@ func getCredentials() error {
 				Help:    "The AWS secret access key corresponding to your access key ID (this is not your password).",
 			},
 		},
-		"",
 	)
 	if err != nil {
 		return err

pkg/asset/installconfig/basedomain.go

@@ -31,7 +31,6 @@ func (a *baseDomain) Generate(asset.Parents) error {
 				return validate.DomainName(ans.(string))
 			}),
 		},
-		"OPENSHIFT_INSTALL_BASE_DOMAIN",
 	)
 	a.BaseDomain = bd
 	return err

pkg/asset/installconfig/clustername.go

@@ -31,7 +31,6 @@ func (a *clusterName) Generate(asset.Parents) error {
 				return validate.DomainName(ans.(string))
 			}),
 		},
-		"OPENSHIFT_INSTALL_CLUSTER_NAME",
 	)
 	a.ClusterName = n
 	return err

pkg/asset/installconfig/emailaddress.go

@@ -31,7 +31,6 @@ func (a *emailAddress) Generate(asset.Parents) error {
 				return validate.Email(ans.(string))
 			}),
 		},
-		"OPENSHIFT_INSTALL_EMAIL_ADDRESS",
 	)
 	a.EmailAddress = email
 	return err

pkg/asset/installconfig/libvirt/libvirt.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"net/url"
-	"os"
 
 	"github.com/pkg/errors"
 	survey "gopkg.in/AlecAivazis/survey.v1"
@@ -32,23 +31,14 @@ func Platform() (*libvirt.Platform, error) {
 			},
 			Validate: survey.ComposeValidators(survey.Required, uriValidator),
 		},
-		"OPENSHIFT_INSTALL_LIBVIRT_URI",
 	)
 	if err != nil {
 		return nil, err
 	}
 
-	qcowImage, ok := os.LookupEnv("OPENSHIFT_INSTALL_LIBVIRT_IMAGE")
-	if ok {
-		err = validURI(qcowImage)
-		if err != nil {
-			return nil, errors.Wrap(err, "resolve OPENSHIFT_INSTALL_LIBVIRT_IMAGE")
-		}
-	} else {
-		qcowImage, err = rhcos.QEMU(context.TODO(), rhcos.DefaultChannel)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to fetch QEMU image URL")
-		}
+	qcowImage, err := rhcos.QEMU(context.TODO(), rhcos.DefaultChannel)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to fetch QEMU image URL")
 	}
 
 	return &libvirt.Platform{

pkg/asset/installconfig/openstack/openstack.go

@@ -150,7 +150,6 @@ func Platform() (*openstack.Platform, error) {
 				return nil
 			}),
 		},
-		"OPENSHIFT_INSTALL_OPENSTACK_CLOUD",
 	)
 	if err != nil {
 		return nil, err
@@ -178,7 +177,6 @@ func Platform() (*openstack.Platform, error) {
 				return nil
 			}),
 		},
-		"OPENSHIFT_INSTALL_OPENSTACK_REGION",
 	)
 	if err != nil {
 		return nil, err
@@ -206,7 +204,6 @@ func Platform() (*openstack.Platform, error) {
 				return nil
 			}),
 		},
-		"OPENSHIFT_INSTALL_OPENSTACK_IMAGE",
 	)
 	if err != nil {
 		return nil, err
@@ -233,7 +230,6 @@ func Platform() (*openstack.Platform, error) {
 				return nil
 			}),
 		},
-		"OPENSHIFT_INSTALL_OPENSTACK_EXTERNAL_NETWORK",
 	)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to Marshal %s platform", openstack.Name)

pkg/asset/installconfig/platform.go

@@ -80,6 +80,5 @@ func (a *platform) queryUserForPlatform() (string, error) {
 				return nil
 			}),
 		},
-		"OPENSHIFT_INSTALL_PLATFORM",
 	)
 }

pkg/asset/installconfig/pullsecret.go

@@ -20,7 +20,7 @@ func (a *pullSecret) Dependencies() []asset.Asset {
 
 // Generate queries for the pull secret from the user.
 func (a *pullSecret) Generate(asset.Parents) error {
-	s, err := asset.GenerateUserProvidedAssetForPath(
+	s, err := asset.GenerateUserProvidedAsset(
 		a.Name(),
 		&survey.Question{
 			Prompt: &survey.Input{
@@ -31,8 +31,6 @@ func (a *pullSecret) Generate(asset.Parents) error {
 				return validate.JSON([]byte(ans.(string)))
 			}),
 		},
-		"OPENSHIFT_INSTALL_PULL_SECRET",
-		"OPENSHIFT_INSTALL_PULL_SECRET_PATH",
 	)
 	a.PullSecret = s
 	return err

pkg/asset/installconfig/ssh.go

@@ -47,38 +47,21 @@ func readSSHKey(path string) (string, error) {
 
 // Generate generates the SSH public key asset.
 func (a *sshPublicKey) Generate(asset.Parents) error {
-	if value, ok := os.LookupEnv("OPENSHIFT_INSTALL_SSH_PUB_KEY"); ok {
-		if value != "" {
-			if err := validate.SSHPublicKey(value); err != nil {
-				return errors.Wrap(err, "failed to validate public key")
-			}
-		}
-		a.Key = value
-		return nil
+	pubKeys := map[string]string{
+		none: "",
 	}
-
-	pubKeys := map[string]string{}
-	if path, ok := os.LookupEnv("OPENSHIFT_INSTALL_SSH_PUB_KEY_PATH"); ok {
-		key, err := readSSHKey(path)
+	home := os.Getenv("HOME")
+	if home != "" {
+		paths, err := filepath.Glob(filepath.Join(home, ".ssh", "*.pub"))
 		if err != nil {
-			return errors.Wrap(err, "failed to read public key file")
+			return errors.Wrap(err, "failed to glob for public key files")
 		}
-		pubKeys[path] = key
-	} else {
-		pubKeys[none] = ""
-		home := os.Getenv("HOME")
-		if home != "" {
-			paths, err := filepath.Glob(filepath.Join(home, ".ssh", "*.pub"))
+		for _, path := range paths {
+			key, err := readSSHKey(path)
 			if err != nil {
-				return errors.Wrap(err, "failed to glob for public key files")
-			}
-			for _, path := range paths {
-				key, err := readSSHKey(path)
-				if err != nil {
-					continue
-				}
-				pubKeys[path] = key
+				continue
 			}
+			pubKeys[path] = key
 		}
 	}
 

pkg/asset/userprovided.go

@@ -1,50 +1,13 @@
 package asset
 
 import (
-	"io/ioutil"
-	"os"
-
 	"github.com/pkg/errors"
 	survey "gopkg.in/AlecAivazis/survey.v1"
 )
 
 // GenerateUserProvidedAsset queries for input from the user.
-func GenerateUserProvidedAsset(inputName string, question *survey.Question, envVarName string) (string, error) {
-	return generateUserProvidedAsset(inputName, question, envVarName, "")
-}
-
-// GenerateUserProvidedAssetForPath queries for input from the user. The input can
-// be read from a file specified in an environment variable.
-func GenerateUserProvidedAssetForPath(inputName string, question *survey.Question, envVarName, pathEnvVarName string) (string, error) {
-	return generateUserProvidedAsset(inputName, question, envVarName, pathEnvVarName)
-}
-
-func generateUserProvidedAsset(inputName string, question *survey.Question, envVarName, pathEnvVarName string) (response string, err error) {
-	defer func() {
-		if err != nil {
-			err = errors.Wrapf(err, "failed to acquire user-provided input %s", inputName)
-		}
-	}()
-
-	if value, ok := os.LookupEnv(envVarName); ok {
-		response = value
-	} else if path, ok := os.LookupEnv(pathEnvVarName); ok {
-		value, err := ioutil.ReadFile(path)
-		if err != nil {
-			return "", errors.Wrapf(err, "failed to read file from %s", pathEnvVarName)
-		}
-		response = string(value)
-	}
-
-	if response == "" {
-		if err := survey.Ask([]*survey.Question{question}, &response); err != nil {
-			return "", errors.Wrap(err, "failed to Ask")
-		}
-	} else if question.Validate != nil {
-		if err := question.Validate(response); err != nil {
-			return "", errors.Wrap(err, "validation failed")
-		}
-	}
-
-	return response, nil
+func GenerateUserProvidedAsset(inputName string, question *survey.Question) (string, error) {
+	var response string
+	err := survey.Ask([]*survey.Question{question}, &response)
+	return response, errors.Wrapf(err, "failed to acquire user-provided input %s", inputName)
 }