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util.go
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util.go
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package controller
import (
"encoding/json"
"fmt"
"k8s.io/api/core/v1"
apiextv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
acidv1 "github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
"github.com/zalando/postgres-operator/pkg/cluster"
"github.com/zalando/postgres-operator/pkg/spec"
"github.com/zalando/postgres-operator/pkg/util/config"
"github.com/zalando/postgres-operator/pkg/util/k8sutil"
"gopkg.in/yaml.v2"
)
func (c *Controller) makeClusterConfig() cluster.Config {
infrastructureRoles := make(map[string]spec.PgUser)
for k, v := range c.config.InfrastructureRoles {
infrastructureRoles[k] = v
}
return cluster.Config{
RestConfig: c.config.RestConfig,
OpConfig: config.Copy(c.opConfig),
InfrastructureRoles: infrastructureRoles,
PodServiceAccount: c.PodServiceAccount,
}
}
func (c *Controller) clusterWorkerID(clusterName spec.NamespacedName) uint32 {
workerID, ok := c.clusterWorkers[clusterName]
if ok {
return workerID
}
c.clusterWorkers[clusterName] = c.curWorkerID
if c.curWorkerID == c.opConfig.Workers-1 {
c.curWorkerID = 0
} else {
c.curWorkerID++
}
return c.clusterWorkers[clusterName]
}
func (c *Controller) createOperatorCRD(crd *apiextv1beta1.CustomResourceDefinition) error {
if _, err := c.KubeClient.CustomResourceDefinitions().Create(crd); err != nil {
if k8sutil.ResourceAlreadyExists(err) {
c.logger.Infof("customResourceDefinition %q is already registered and will only be updated", crd.Name)
patch, err := json.Marshal(crd)
if err != nil {
return fmt.Errorf("could not marshal new customResourceDefintion: %v", err)
}
if _, err := c.KubeClient.CustomResourceDefinitions().Patch(crd.Name, types.MergePatchType, patch); err != nil {
return fmt.Errorf("could not update customResourceDefinition: %v", err)
}
} else {
c.logger.Errorf("could not create customResourceDefinition %q: %v", crd.Name, err)
}
} else {
c.logger.Infof("customResourceDefinition %q has been registered", crd.Name)
}
return wait.Poll(c.config.CRDReadyWaitInterval, c.config.CRDReadyWaitTimeout, func() (bool, error) {
c, err := c.KubeClient.CustomResourceDefinitions().Get(crd.Name, metav1.GetOptions{})
if err != nil {
return false, err
}
for _, cond := range c.Status.Conditions {
switch cond.Type {
case apiextv1beta1.Established:
if cond.Status == apiextv1beta1.ConditionTrue {
return true, err
}
case apiextv1beta1.NamesAccepted:
if cond.Status == apiextv1beta1.ConditionFalse {
return false, fmt.Errorf("name conflict: %v", cond.Reason)
}
}
}
return false, err
})
}
func (c *Controller) createPostgresCRD() error {
return c.createOperatorCRD(acidv1.PostgresCRD())
}
func (c *Controller) createConfigurationCRD() error {
return c.createOperatorCRD(acidv1.ConfigurationCRD())
}
func readDecodedRole(s string) (*spec.PgUser, error) {
var result spec.PgUser
if err := yaml.Unmarshal([]byte(s), &result); err != nil {
return nil, fmt.Errorf("could not decode yaml role: %v", err)
}
return &result, nil
}
func (c *Controller) getInfrastructureRoles(rolesSecret *spec.NamespacedName) (map[string]spec.PgUser, error) {
if *rolesSecret == (spec.NamespacedName{}) {
// we don't have infrastructure roles defined, bail out
return nil, nil
}
infraRolesSecret, err := c.KubeClient.
Secrets(rolesSecret.Namespace).
Get(rolesSecret.Name, metav1.GetOptions{})
if err != nil {
c.logger.Debugf("infrastructure roles secret name: %q", *rolesSecret)
return nil, fmt.Errorf("could not get infrastructure roles secret: %v", err)
}
secretData := infraRolesSecret.Data
result := make(map[string]spec.PgUser)
Users:
// in worst case we would have one line per user
for i := 1; i <= len(secretData); i++ {
properties := []string{"user", "password", "inrole"}
t := spec.PgUser{Origin: spec.RoleOriginInfrastructure}
for _, p := range properties {
key := fmt.Sprintf("%s%d", p, i)
if val, present := secretData[key]; !present {
if p == "user" {
// exit when the user name with the next sequence id is absent
break Users
}
} else {
s := string(val)
switch p {
case "user":
t.Name = s
case "password":
t.Password = s
case "inrole":
t.MemberOf = append(t.MemberOf, s)
default:
c.logger.Warningf("unknown key %q", p)
}
}
delete(secretData, key)
}
if t.Name != "" {
if t.Password == "" {
c.logger.Warningf("infrastructure role %q has no password defined and is ignored", t.Name)
continue
}
result[t.Name] = t
}
}
// perhaps we have some map entries with usernames, passwords, let's check if we have those users in the configmap
if infraRolesMap, err := c.KubeClient.ConfigMaps(rolesSecret.Namespace).Get(rolesSecret.Name, metav1.GetOptions{}); err == nil {
// we have a configmap with username - json description, let's read and decode it
for role, s := range infraRolesMap.Data {
roleDescr, err := readDecodedRole(s)
if err != nil {
return nil, fmt.Errorf("could not decode role description: %v", err)
}
// check if we have a a password in a configmap
c.logger.Debugf("found role description for role %q: %+v", role, roleDescr)
if passwd, ok := secretData[role]; ok {
roleDescr.Password = string(passwd)
delete(secretData, role)
} else {
c.logger.Warningf("infrastructure role %q has no password defined and is ignored", role)
continue
}
roleDescr.Name = role
roleDescr.Origin = spec.RoleOriginInfrastructure
result[role] = *roleDescr
}
}
if len(secretData) > 0 {
c.logger.Warningf("%d unprocessed entries in the infrastructure roles secret,"+
" checking configmap %v", len(secretData), rolesSecret.Name)
c.logger.Info(`infrastructure role entries should be in the {key}{id} format,` +
` where {key} can be either of "user", "password", "inrole" and the {id}` +
` a monotonically increasing integer starting with 1`)
c.logger.Debugf("unprocessed entries: %#v", secretData)
}
return result, nil
}
func (c *Controller) podClusterName(pod *v1.Pod) spec.NamespacedName {
if name, ok := pod.Labels[c.opConfig.ClusterNameLabel]; ok {
return spec.NamespacedName{
Namespace: pod.Namespace,
Name: name,
}
}
return spec.NamespacedName{}
}