/
env.go
483 lines (446 loc) · 15.3 KB
/
env.go
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package eksconfig
import (
"encoding/json"
"fmt"
"os"
"reflect"
"strconv"
"strings"
)
const (
// EnvironmentVariablePrefix is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefix = "AWS_K8S_TESTER_EKS_"
// EnvironmentVariablePrefixParameters is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixParameters = "AWS_K8S_TESTER_EKS_PARAMETERS_"
// EnvironmentVariablePrefixAddOnNodeGroups is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnNodeGroups = "AWS_K8S_TESTER_EKS_ADD_ON_NODE_GROUPS_"
// EnvironmentVariablePrefixAddOnManagedNodeGroups is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnManagedNodeGroups = "AWS_K8S_TESTER_EKS_ADD_ON_MANAGED_NODE_GROUPS_"
// EnvironmentVariablePrefixAddOnNLBHelloWorld is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnNLBHelloWorld = "AWS_K8S_TESTER_EKS_ADD_ON_NLB_HELLO_WORLD_"
// EnvironmentVariablePrefixAddOnALB2048 is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnALB2048 = "AWS_K8S_TESTER_EKS_ADD_ON_ALB_2048_"
// EnvironmentVariablePrefixAddOnJobsPi is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnJobsPi = "AWS_K8S_TESTER_EKS_ADD_ON_JOBS_PI_"
// EnvironmentVariablePrefixAddOnJobsEcho is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnJobsEcho = "AWS_K8S_TESTER_EKS_ADD_ON_JOBS_ECHO_"
// EnvironmentVariablePrefixAddOnCronJobs is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnCronJobs = "AWS_K8S_TESTER_EKS_ADD_ON_CRON_JOBS_"
// EnvironmentVariablePrefixAddOnCSRs is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnCSRs = "AWS_K8S_TESTER_EKS_ADD_ON_CSRS_"
// EnvironmentVariablePrefixAddOnConfigMaps is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnConfigMaps = "AWS_K8S_TESTER_EKS_ADD_ON_CONFIG_MAPS_"
// EnvironmentVariablePrefixAddOnSecrets is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnSecrets = "AWS_K8S_TESTER_EKS_ADD_ON_SECRETS_"
// EnvironmentVariablePrefixAddOnIRSA is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnIRSA = "AWS_K8S_TESTER_EKS_ADD_ON_IRSA_"
// EnvironmentVariablePrefixAddOnFargate is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnFargate = "AWS_K8S_TESTER_EKS_ADD_ON_FARGATE_"
// EnvironmentVariablePrefixAddOnIRSAFargate is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnIRSAFargate = "AWS_K8S_TESTER_EKS_ADD_ON_IRSA_FARGATE_"
// EnvironmentVariablePrefixAddOnAppMesh is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnAppMesh = "AWS_K8S_TESTER_EKS_ADD_ON_APP_MESH_"
// EnvironmentVariablePrefixAddOnCSIEBS is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnCSIEBS = "AWS_K8S_TESTER_EKS_ADD_ON_CSI_EBS_"
// EnvironmentVariablePrefixAddOnWordpress is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnWordpress = "AWS_K8S_TESTER_EKS_ADD_ON_WORDPRESS_"
// EnvironmentVariablePrefixAddOnKubernetesDashboard is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnKubernetesDashboard = "AWS_K8S_TESTER_EKS_ADD_ON_KUBERNETES_DASHBOARD_"
// EnvironmentVariablePrefixAddOnPrometheusGrafana is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnPrometheusGrafana = "AWS_K8S_TESTER_EKS_ADD_ON_PROMETHEUS_GRAFANA_"
// EnvironmentVariablePrefixAddOnKubeflow is the environment variable prefix used for "eksconfig".
EnvironmentVariablePrefixAddOnKubeflow = "AWS_K8S_TESTER_EKS_ADD_ON_KUBEFLOW_"
)
// UpdateFromEnvs updates fields from environmental variables.
// Empty values are ignored and do not overwrite fields with empty values.
// WARNING: The environmetal variable value always overwrites current field
// values if there's a conflict.
func (cfg *Config) UpdateFromEnvs() (err error) {
cfg.mu.Lock()
defer func() {
cfg.unsafeSync()
cfg.mu.Unlock()
}()
if cfg.Parameters == nil {
cfg.Parameters = &Parameters{}
}
var vv interface{}
vv, err = parseEnvs(EnvironmentVariablePrefix, cfg)
if err != nil {
return err
}
if av, ok := vv.(*Config); ok {
before := cfg.Parameters
cfg = av
after := cfg.Parameters
if !reflect.DeepEqual(before, after) {
return fmt.Errorf("Parameters overwritten [before %+v, after %+v]", before, after)
}
} else {
return fmt.Errorf("expected *Config, got %T", vv)
}
if cfg.Parameters == nil {
cfg.Parameters = &Parameters{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixParameters, cfg.Parameters)
if err != nil {
return err
}
if av, ok := vv.(*Parameters); ok {
cfg.Parameters = av
} else {
return fmt.Errorf("expected *Parameters, got %T", vv)
}
if cfg.AddOnNodeGroups == nil {
cfg.AddOnNodeGroups = &AddOnNodeGroups{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnNodeGroups, cfg.AddOnNodeGroups)
if err != nil {
return err
}
if av, ok := vv.(*AddOnNodeGroups); ok {
cfg.AddOnNodeGroups = av
} else {
return fmt.Errorf("expected *AddOnNodeGroups, got %T", vv)
}
if cfg.AddOnManagedNodeGroups == nil {
cfg.AddOnManagedNodeGroups = &AddOnManagedNodeGroups{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnManagedNodeGroups, cfg.AddOnManagedNodeGroups)
if err != nil {
return err
}
if av, ok := vv.(*AddOnManagedNodeGroups); ok {
cfg.AddOnManagedNodeGroups = av
} else {
return fmt.Errorf("expected *AddOnManagedNodeGroups, got %T", vv)
}
if cfg.AddOnNLBHelloWorld == nil {
cfg.AddOnNLBHelloWorld = &AddOnNLBHelloWorld{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnNLBHelloWorld, cfg.AddOnNLBHelloWorld)
if err != nil {
return err
}
if av, ok := vv.(*AddOnNLBHelloWorld); ok {
cfg.AddOnNLBHelloWorld = av
} else {
return fmt.Errorf("expected *AddOnNLBHelloWorld, got %T", vv)
}
if cfg.AddOnALB2048 == nil {
cfg.AddOnALB2048 = &AddOnALB2048{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnALB2048, cfg.AddOnALB2048)
if err != nil {
return err
}
if av, ok := vv.(*AddOnALB2048); ok {
cfg.AddOnALB2048 = av
} else {
return fmt.Errorf("expected *AddOnALB2048, got %T", vv)
}
if cfg.AddOnJobsPi == nil {
cfg.AddOnJobsPi = &AddOnJobsPi{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnJobsPi, cfg.AddOnJobsPi)
if err != nil {
return err
}
if av, ok := vv.(*AddOnJobsPi); ok {
cfg.AddOnJobsPi = av
} else {
return fmt.Errorf("expected *AddOnJobsPi, got %T", vv)
}
if cfg.AddOnJobsEcho == nil {
cfg.AddOnJobsEcho = &AddOnJobsEcho{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnJobsEcho, cfg.AddOnJobsEcho)
if err != nil {
return err
}
if av, ok := vv.(*AddOnJobsEcho); ok {
cfg.AddOnJobsEcho = av
} else {
return fmt.Errorf("expected *AddOnJobsEcho, got %T", vv)
}
if cfg.AddOnCronJobs == nil {
cfg.AddOnCronJobs = &AddOnCronJobs{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnCronJobs, cfg.AddOnCronJobs)
if err != nil {
return err
}
if av, ok := vv.(*AddOnCronJobs); ok {
cfg.AddOnCronJobs = av
} else {
return fmt.Errorf("expected *AddOnCronJobs, got %T", vv)
}
if cfg.AddOnCSRs == nil {
cfg.AddOnCSRs = &AddOnCSRs{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnCSRs, cfg.AddOnCSRs)
if err != nil {
return err
}
if av, ok := vv.(*AddOnCSRs); ok {
cfg.AddOnCSRs = av
} else {
return fmt.Errorf("expected *AddOnCSRs, got %T", vv)
}
if cfg.AddOnConfigMaps == nil {
cfg.AddOnConfigMaps = &AddOnConfigMaps{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnConfigMaps, cfg.AddOnConfigMaps)
if err != nil {
return err
}
if av, ok := vv.(*AddOnConfigMaps); ok {
cfg.AddOnConfigMaps = av
} else {
return fmt.Errorf("expected *AddOnConfigMaps, got %T", vv)
}
if cfg.AddOnSecrets == nil {
cfg.AddOnSecrets = &AddOnSecrets{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnSecrets, cfg.AddOnSecrets)
if err != nil {
return err
}
if av, ok := vv.(*AddOnSecrets); ok {
cfg.AddOnSecrets = av
} else {
return fmt.Errorf("expected *AddOnSecrets, got %T", vv)
}
if cfg.AddOnIRSA == nil {
cfg.AddOnIRSA = &AddOnIRSA{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnIRSA, cfg.AddOnIRSA)
if err != nil {
return err
}
if av, ok := vv.(*AddOnIRSA); ok {
cfg.AddOnIRSA = av
} else {
return fmt.Errorf("expected *AddOnIRSA, got %T", vv)
}
if cfg.AddOnFargate == nil {
cfg.AddOnFargate = &AddOnFargate{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnFargate, cfg.AddOnFargate)
if err != nil {
return err
}
if av, ok := vv.(*AddOnFargate); ok {
cfg.AddOnFargate = av
} else {
return fmt.Errorf("expected *AddOnFargate, got %T", vv)
}
if cfg.AddOnIRSAFargate == nil {
cfg.AddOnIRSAFargate = &AddOnIRSAFargate{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnIRSAFargate, cfg.AddOnIRSAFargate)
if err != nil {
return err
}
if av, ok := vv.(*AddOnIRSAFargate); ok {
cfg.AddOnIRSAFargate = av
} else {
return fmt.Errorf("expected *AddOnIRSAFargate, got %T", vv)
}
if cfg.AddOnCSIEBS == nil {
cfg.AddOnCSIEBS = &AddOnCSIEBS{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnCSIEBS, cfg.AddOnCSIEBS)
if err != nil {
return err
}
if av, ok := vv.(*AddOnCSIEBS); ok {
cfg.AddOnCSIEBS = av
} else {
return fmt.Errorf("expected *AddOnCSIEBS, got %T", vv)
}
if cfg.AddOnAppMesh == nil {
cfg.AddOnAppMesh = &AddOnAppMesh{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnAppMesh, cfg.AddOnAppMesh)
if err != nil {
return err
}
if av, ok := vv.(*AddOnAppMesh); ok {
cfg.AddOnAppMesh = av
} else {
return fmt.Errorf("expected *AddOnAppMesh, got %T", vv)
}
if cfg.AddOnWordpress == nil {
cfg.AddOnWordpress = &AddOnWordpress{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnWordpress, cfg.AddOnWordpress)
if err != nil {
return err
}
if av, ok := vv.(*AddOnWordpress); ok {
cfg.AddOnWordpress = av
} else {
return fmt.Errorf("expected *AddOnWordpress, got %T", vv)
}
if cfg.AddOnKubernetesDashboard == nil {
cfg.AddOnKubernetesDashboard = &AddOnKubernetesDashboard{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnKubernetesDashboard, cfg.AddOnKubernetesDashboard)
if err != nil {
return err
}
if av, ok := vv.(*AddOnKubernetesDashboard); ok {
cfg.AddOnKubernetesDashboard = av
} else {
return fmt.Errorf("expected *AddOnKubernetesDashboard, got %T", vv)
}
if cfg.AddOnPrometheusGrafana == nil {
cfg.AddOnPrometheusGrafana = &AddOnPrometheusGrafana{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnPrometheusGrafana, cfg.AddOnPrometheusGrafana)
if err != nil {
return err
}
if av, ok := vv.(*AddOnPrometheusGrafana); ok {
cfg.AddOnPrometheusGrafana = av
} else {
return fmt.Errorf("expected *AddOnPrometheusGrafana, got %T", vv)
}
if cfg.AddOnKubeflow == nil {
cfg.AddOnKubeflow = &AddOnKubeflow{}
}
vv, err = parseEnvs(EnvironmentVariablePrefixAddOnKubeflow, cfg.AddOnKubeflow)
if err != nil {
return err
}
if av, ok := vv.(*AddOnKubeflow); ok {
cfg.AddOnKubeflow = av
} else {
return fmt.Errorf("expected *AddOnKubeflow, got %T", vv)
}
return nil
}
func parseEnvs(pfx string, addOn interface{}) (interface{}, error) {
tp, vv := reflect.TypeOf(addOn).Elem(), reflect.ValueOf(addOn).Elem()
for i := 0; i < tp.NumField(); i++ {
jv := tp.Field(i).Tag.Get("json")
if jv == "" {
continue
}
jv = strings.Replace(jv, ",omitempty", "", -1)
jv = strings.ToUpper(strings.Replace(jv, "-", "_", -1))
env := pfx + jv
sv := os.Getenv(env)
if sv == "" {
continue
}
if tp.Field(i).Tag.Get("read-only") == "true" { // skip updating read-only field
continue
}
fieldName := tp.Field(i).Name
switch vv.Field(i).Type().Kind() {
case reflect.String:
vv.Field(i).SetString(sv)
case reflect.Bool:
bb, err := strconv.ParseBool(sv)
if err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
vv.Field(i).SetBool(bb)
case reflect.Int, reflect.Int32, reflect.Int64:
iv, err := strconv.ParseInt(sv, 10, 64)
if err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
vv.Field(i).SetInt(iv)
case reflect.Uint, reflect.Uint32, reflect.Uint64:
iv, err := strconv.ParseUint(sv, 10, 64)
if err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
vv.Field(i).SetUint(iv)
case reflect.Float32, reflect.Float64:
fv, err := strconv.ParseFloat(sv, 64)
if err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
vv.Field(i).SetFloat(fv)
case reflect.Slice: // only supports "[]string" for now
ss := strings.Split(sv, ",")
if len(ss) < 1 {
continue
}
slice := reflect.MakeSlice(reflect.TypeOf([]string{}), len(ss), len(ss))
for j := range ss {
slice.Index(j).SetString(ss[j])
}
vv.Field(i).Set(slice)
case reflect.Map:
switch fieldName {
case "Tags":
vv.Field(i).Set(reflect.ValueOf(make(map[string]string)))
for _, pair := range strings.Split(sv, ";") {
fields := strings.Split(pair, "=")
if len(fields) != 2 {
return nil, fmt.Errorf("map %q for %q has unexpected format (e.g. should be 'a=b;c;d,e=f')", sv, fieldName)
}
vv.Field(i).SetMapIndex(reflect.ValueOf(fields[0]), reflect.ValueOf(fields[1]))
}
case "ASGs":
asgs := make(map[string]ASG)
if err := json.Unmarshal([]byte(sv), &asgs); err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
for k, v := range asgs {
tp2, vv2 := reflect.TypeOf(&v).Elem(), reflect.ValueOf(&v).Elem()
for j := 0; j < tp2.NumField(); j++ {
jv := tp2.Field(j).Tag.Get("json")
if jv == "" {
continue
}
if tp2.Field(j).Tag.Get("read-only") != "true" {
continue
}
if vv2.Field(j).Type().Kind() != reflect.String {
continue
}
// skip updating read-only field
vv2.Field(j).SetString("")
}
asgs[k] = v
}
vv.Field(i).Set(reflect.ValueOf(asgs))
case "MNGs":
mngs := make(map[string]MNG)
if err := json.Unmarshal([]byte(sv), &mngs); err != nil {
return nil, fmt.Errorf("failed to parse %q (field name %q, environmental variable key %q, error %v)", sv, fieldName, env, err)
}
for k, v := range mngs {
tp2, vv2 := reflect.TypeOf(&v).Elem(), reflect.ValueOf(&v).Elem()
for j := 0; j < tp2.NumField(); j++ {
jv := tp2.Field(j).Tag.Get("json")
if jv == "" {
continue
}
if tp2.Field(j).Tag.Get("read-only") != "true" {
continue
}
if vv2.Field(j).Type().Kind() != reflect.String {
continue
}
// skip updating read-only field
vv2.Field(j).SetString("")
}
mngs[k] = v
}
vv.Field(i).Set(reflect.ValueOf(mngs))
default:
return nil, fmt.Errorf("field %q not supported for reflect.Map", fieldName)
}
default:
return nil, fmt.Errorf("%q (type %v) is not supported as an env", env, vv.Field(i).Type())
}
}
return addOn, nil
}