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setupContext.go
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setupContext.go
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package context
import (
"context"
"fmt"
"github.com/cloudogu/cesapp-lib/core"
"github.com/cloudogu/k8s-apply-lib/apply"
"os"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"github.com/sirupsen/logrus"
)
const SecretDoguRegistry = "k8s-dogu-operator-dogu-registry"
const SecretDockerRegistry = "k8s-dogu-operator-docker-registry"
const SetupConfigConfigmap = "k8s-ces-setup-config"
const SetupConfigConfigmapDevPath = "k8s/dev-resources/k8s-ces-setup.yaml"
const SetupStartUpConfigMap = "k8s-ces-setup-json"
const SetupStartUpConfigMapDevPath = "k8s/dev-resources/setup.json"
const SetupStateConfigMap = "k8s-setup-config"
const SetupStateKey = "state"
const SetupStateInstalled = "installed"
const SetupStateInstalling = "installing"
const EnvironmentVariableStage = "STAGE"
const StageDevelopment = "development"
const EnvironmentVariableTargetNamespace = "POD_NAMESPACE"
// SetupContext contains all context information provided by the setup.
type SetupContext struct {
AppVersion string `yaml:"app_version"`
AppConfig *Config `yaml:"app_config"`
StartupConfiguration *SetupConfiguration `json:"startup_configuration"`
}
// SetupContextBuilder contains information to create a setup context
type SetupContextBuilder struct {
version string
DevSetupConfigPath string
DevStartupConfigPath string
}
// NewSetupContextBuilder creates a new builder to create a setup context. Default dev resources paths are used.
func NewSetupContextBuilder(version string) *SetupContextBuilder {
return &SetupContextBuilder{
version: version,
DevSetupConfigPath: SetupConfigConfigmapDevPath,
DevStartupConfigPath: SetupStartUpConfigMapDevPath,
}
}
// NewSetupContext creates a new setup context.
func (scb *SetupContextBuilder) NewSetupContext(clientSet kubernetes.Interface) (*SetupContext, error) {
logrus.Print("Reading configuration file...")
targetNamespace, err := GetEnvVar(EnvironmentVariableTargetNamespace)
if err != nil {
return nil, fmt.Errorf("could not read current namespace: %w", err)
}
config, setupJson, err := scb.getConfigurations(clientSet, targetNamespace)
if err != nil {
return nil, err
}
config.TargetNamespace = targetNamespace
keyProvider := config.KeyProvider
if keyProvider != "pkcs1v15" && config.KeyProvider != "oaesp" {
return nil, fmt.Errorf("invalid key provider: %s", keyProvider)
}
configureLogger(config)
return &SetupContext{
AppVersion: scb.version,
AppConfig: config,
StartupConfiguration: setupJson,
}, nil
}
func (scb *SetupContextBuilder) getConfigurations(clientSet kubernetes.Interface, targetNamespace string) (*Config, *SetupConfiguration, error) {
if os.Getenv(EnvironmentVariableStage) == StageDevelopment {
config, err := ReadConfigFromFile(scb.DevSetupConfigPath)
if err != nil {
return nil, nil, err
}
setupJson, err := ReadSetupConfigFromFile(scb.DevStartupConfigPath)
return config, setupJson, err
} else {
config, err := ReadConfigFromCluster(clientSet, targetNamespace)
if err != nil {
return nil, nil, err
}
setupJson, err := ReadSetupConfigFromCluster(clientSet, targetNamespace)
return config, setupJson, err
}
}
// GetSetupStateConfigMap returns or creates if it does not exist the configmap map for presenting the state of the setup process
func GetSetupStateConfigMap(client kubernetes.Interface, namespace string) (*corev1.ConfigMap, error) {
configMap, err := client.CoreV1().ConfigMaps(namespace).Get(context.Background(), SetupStateConfigMap, metav1.GetOptions{})
if errors.IsNotFound(err) {
setupConfigMap := &corev1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: SetupStateConfigMap,
Namespace: namespace,
Labels: map[string]string{"app.kubernetes.io/name": "k8s-ces-setup"},
},
}
configMap, err = client.CoreV1().ConfigMaps(namespace).Create(context.Background(), setupConfigMap, metav1.CreateOptions{})
if err != nil {
return nil, fmt.Errorf("failed to create configmap [%s]: %w", SetupStateConfigMap, err)
}
}
if configMap.Data == nil {
configMap.Data = map[string]string{}
}
return configMap, nil
}
// GetEnvVar returns an arbitrary environment variable; otherwise it returns an error
func GetEnvVar(name string) (string, error) {
ns, found := os.LookupEnv(name)
if !found {
return "", fmt.Errorf("%s must be set", name)
}
return ns, nil
}
func configureLogger(config *Config) {
logrus.SetLevel(config.LogLevel)
logrus.SetFormatter(&logrus.TextFormatter{
DisableTimestamp: true,
})
core.GetLogger = func() core.Logger {
return logrus.StandardLogger()
}
apply.GetLogger = func() apply.Logger {
return logrus.StandardLogger()
}
}