github.com/banzaicloud/operator-tools@v0.28.10/pkg/reconciler/conditions.go (about)

     1  // Copyright © 2020 Banzai Cloud
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package reconciler
    16  
    17  import (
    18  	"time"
    19  
    20  	"github.com/go-logr/logr"
    21  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    22  	"k8s.io/apimachinery/pkg/runtime"
    23  	"k8s.io/apimachinery/pkg/runtime/schema"
    24  	"sigs.k8s.io/controller-runtime/pkg/client"
    25  
    26  	"github.com/banzaicloud/operator-tools/pkg/wait"
    27  )
    28  
    29  var DefaultBackoff = wait.Backoff{
    30  	Duration: time.Second * 5,
    31  	Factor:   1,
    32  	Jitter:   0,
    33  	Steps:    12,
    34  }
    35  
    36  type ConditionType string
    37  
    38  type ObjectKeyWithGVK struct {
    39  	ObjectKey client.ObjectKey        `json:"objectKey,omitempty"`
    40  	GVK       schema.GroupVersionKind `json:"gvk,omitempty"`
    41  }
    42  
    43  type ResourceCondition struct {
    44  	ID           string                              `json:"id,omitempty"`
    45  	Description  string                              `json:"shortDescription,omitempty"`
    46  	Checks       []wait.ResourceConditionCheck       `json:"checks,omitempty"`
    47  	CustomChecks []wait.CustomResourceConditionCheck `json:"customChecks,omitempty"`
    48  	Object       *ObjectKeyWithGVK                   `json:"object,omitempty"`
    49  }
    50  
    51  type ConditionChecker struct {
    52  	client client.Client
    53  	scheme *runtime.Scheme
    54  	log logr.Logger
    55  }
    56  
    57  func NewConditionChecker(client client.Client, scheme *runtime.Scheme, log logr.Logger) *ConditionChecker {
    58  	return &ConditionChecker{
    59  		client: client,
    60  		scheme: scheme,
    61  		log: log,
    62  	}
    63  }
    64  
    65  func (c *ConditionChecker) CheckResourceConditions(conditions []ResourceCondition, backoff *wait.Backoff) error {
    66  	if backoff == nil {
    67  		backoff = &DefaultBackoff
    68  	}
    69  
    70  	log := c.log.WithName("pre-checks")
    71  	checks := wait.NewResourceConditionChecks(c.client, *backoff, log, c.scheme)
    72  
    73  	log.Info("checking resource pre-conditions")
    74  
    75  	for _, condition := range conditions {
    76  		if condition.Object != nil && len(condition.Checks) > 0 {
    77  			o, err := c.scheme.New(condition.Object.GVK)
    78  			if err != nil {
    79  				return err
    80  			}
    81  			if mo, ok := o.(metav1.Object); ok {
    82  				mo.SetName(condition.Object.ObjectKey.Name)
    83  				mo.SetNamespace(condition.Object.ObjectKey.Namespace)
    84  			}
    85  			err = checks.WaitForResources(condition.ID, []runtime.Object{o}, condition.Checks...)
    86  			if err != nil {
    87  				return err
    88  			}
    89  		}
    90  
    91  		if len(condition.CustomChecks) > 0 {
    92  			err := checks.WaitForCustomConditionChecks(condition.ID, condition.CustomChecks...)
    93  			if err != nil {
    94  				return err
    95  			}
    96  		}
    97  	}
    98  
    99  	return nil
   100  }