forked from Altinity/clickhouse-operator
/
getter.go
227 lines (183 loc) · 6.73 KB
/
getter.go
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// Copyright 2019 Altinity Ltd and/or its affiliates. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package chi
import (
"fmt"
apps "k8s.io/api/apps/v1"
core "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
kublabels "k8s.io/apimachinery/pkg/labels"
chiv1 "github.com/altinity/clickhouse-operator/pkg/apis/clickhouse.altinity.com/v1"
chop "github.com/altinity/clickhouse-operator/pkg/apis/clickhouse.altinity.com/v1"
chopmodel "github.com/altinity/clickhouse-operator/pkg/model"
)
// getConfigMap gets ConfigMap either by namespaced name or by labels
// TODO review byNameOnly params
func (c *Controller) getConfigMap(objMeta *meta.ObjectMeta, byNameOnly bool) (*core.ConfigMap, error) {
get := c.configMapLister.ConfigMaps(objMeta.Namespace).Get
list := c.configMapLister.ConfigMaps(objMeta.Namespace).List
var objects []*core.ConfigMap
// Check whether object with such name already exists
obj, err := get(objMeta.Name)
if (obj != nil) && (err == nil) {
// Object found by name
return obj, nil
}
if !apierrors.IsNotFound(err) {
// Error, which is not related to "Object not found"
return nil, err
}
// Object not found by name
if byNameOnly {
return nil, err
}
// Try to find by labels
var selector kublabels.Selector
if selector, err = chopmodel.MakeSelectorFromObjectMeta(objMeta); err != nil {
return nil, err
}
if objects, err = list(selector); err != nil {
return nil, err
}
if len(objects) == 0 {
return nil, apierrors.NewNotFound(apps.Resource("ConfigMap"), objMeta.Name)
}
if len(objects) == 1 {
// Exactly one object found by labels
return objects[0], nil
}
// Too much objects found by labels
return nil, fmt.Errorf("too much objects found %d expecting 1", len(objects))
}
// getService gets Service either by namespaced name or by labels
// TODO review byNameOnly params
func (c *Controller) getService(objMeta *meta.ObjectMeta, byNameOnly bool) (*core.Service, error) {
get := c.serviceLister.Services(objMeta.Namespace).Get
list := c.serviceLister.Services(objMeta.Namespace).List
var objects []*core.Service
// Check whether object with such name already exists
obj, err := get(objMeta.Name)
if (obj != nil) && (err == nil) {
// Object found by name
return obj, nil
}
if !apierrors.IsNotFound(err) {
// Error, which is not related to "Object not found"
return nil, err
}
// Object not found by name. Try to find by labels
if byNameOnly {
return nil, fmt.Errorf("object not found by name %s/%s and no label search allowed ", objMeta.Namespace, objMeta.Name)
}
var selector kublabels.Selector
if selector, err = chopmodel.MakeSelectorFromObjectMeta(objMeta); err != nil {
return nil, err
}
if objects, err = list(selector); err != nil {
return nil, err
}
if len(objects) == 0 {
return nil, apierrors.NewNotFound(apps.Resource("Service"), objMeta.Name)
}
if len(objects) == 1 {
// Exactly one object found by labels
return objects[0], nil
}
// Too much objects found by labels
return nil, fmt.Errorf("too much objects found %d expecting 1", len(objects))
}
// getStatefulSet gets StatefulSet. Accepted types:
// 1. *meta.ObjectMeta
// 2. *chop.ChiHost
func (c *Controller) getStatefulSet(obj interface{}, byName ...bool) (*apps.StatefulSet, error) {
switch typedObj := obj.(type) {
case *meta.ObjectMeta:
var b bool
if len(byName) > 0 {
b = byName[0]
}
return c.getStatefulSetByMeta(typedObj, b)
case *chop.ChiHost:
return c.getStatefulSetByHost(typedObj)
}
return nil, fmt.Errorf("unknown type")
}
// getStatefulSet gets StatefulSet either by namespaced name or by labels
// TODO review byNameOnly params
func (c *Controller) getStatefulSetByMeta(objMeta *meta.ObjectMeta, byNameOnly bool) (*apps.StatefulSet, error) {
get := c.statefulSetLister.StatefulSets(objMeta.Namespace).Get
list := c.statefulSetLister.StatefulSets(objMeta.Namespace).List
var objects []*apps.StatefulSet
// Check whether object with such name already exists
obj, err := get(objMeta.Name)
if (obj != nil) && (err == nil) {
// Object found by name
return obj, nil
}
if !apierrors.IsNotFound(err) {
// Error, which is not related to "Object not found"
return nil, err
}
// Object not found by name. Try to find by labels
if byNameOnly {
return nil, fmt.Errorf("object not found by name %s/%s and no label search allowed ", objMeta.Namespace, objMeta.Name)
}
var selector kublabels.Selector
if selector, err = chopmodel.MakeSelectorFromObjectMeta(objMeta); err != nil {
return nil, err
}
if objects, err = list(selector); err != nil {
return nil, err
}
if len(objects) == 0 {
return nil, apierrors.NewNotFound(apps.Resource("StatefulSet"), objMeta.Name)
}
if len(objects) == 1 {
// Exactly one object found by labels
return objects[0], nil
}
// Too much objects found by labels
return nil, fmt.Errorf("too much objects found %d expecting 1", len(objects))
}
// getStatefulSetByHost finds StatefulSet of a specified host
func (c *Controller) getStatefulSetByHost(host *chop.ChiHost) (*apps.StatefulSet, error) {
// Namespaced name
name := chopmodel.CreateStatefulSetName(host)
namespace := host.Address.Namespace
return c.kubeClient.AppsV1().StatefulSets(namespace).Get(newContext(), name, newGetOptions())
}
// getPod gets pod for host or StatefulSet. Accepted types:
// 1. *apps.StatefulSet
// 2. *chop.ChiHost
func (c *Controller) getPod(obj interface{}) (*core.Pod, error) {
var name, namespace string
switch typedObj := obj.(type) {
case *chop.ChiHost:
name = chopmodel.CreatePodName(obj)
namespace = typedObj.Address.Namespace
case *apps.StatefulSet:
name = chopmodel.CreatePodName(obj)
namespace = typedObj.Namespace
}
return c.kubeClient.CoreV1().Pods(namespace).Get(newContext(), name, newGetOptions())
}
// GetCHIByObjectMeta gets CHI by namespaced name
func (c *Controller) GetCHIByObjectMeta(objectMeta *meta.ObjectMeta) (*chiv1.ClickHouseInstallation, error) {
chiName, err := chopmodel.GetCHINameFromObjectMeta(objectMeta)
if err != nil {
return nil, fmt.Errorf("unable to find CHI by name: '%s'. More info: %v", objectMeta.Name, err)
}
return c.chopClient.ClickhouseV1().ClickHouseInstallations(objectMeta.Namespace).Get(newContext(), chiName, newGetOptions())
}