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deployment.go
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deployment.go
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// Copyright (c) 2018 CA. 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 main
import (
"context"
// "fmt"
"strings"
)
// Top level Kubernetes replicated controller. Deployments are built out
// of ReplicaSets.
type deployment struct {
Metadata metadata
Spec deploymentSpec
Owner resource
RootOwner resource
ReplicaSets *[]replicaSet
}
type deploymentSpec struct {
MinReadySeconds int32
Paused bool
ProgressDeadlineSeconds int32
Replicas int32
RevisionHistoryLimit int32
Selector *labelSelector
Strategy *deploymentStrategy
Template podTemplateSpec
}
type podTemplateSpec struct {
Metadata metadata
Spec podSpec
}
type labelSelector struct {
MatchExpressions *[]labelSelectorRequirement
MatchLabels *[]label
}
type labelSelectorRequirement struct {
Key string
Operator string
Values []string
}
type deploymentStrategy struct {
RollingUpdate *rollingUpdateDeployment
Type *string
}
type rollingUpdateDeployment struct {
MaxSurgeInt *int32
MaxSurgeString *string
MaxUnavailableInt *int32
MaxUnavailableString *string
}
type deploymentResolver struct {
ctx context.Context
d deployment
}
type deploymentSpecResolver struct {
ctx context.Context
d deploymentSpec
}
type labelSelectorResolver struct {
ctx context.Context
l labelSelector
}
type deploymentStrategyResolver struct {
ctx context.Context
d *deploymentStrategy
}
type labelSelectorRequirementResolver struct {
ctx context.Context
l labelSelectorRequirement
}
type rollingUpdateDeploymentResolver struct {
ctx context.Context
r rollingUpdateDeployment
}
type podTemplateSpecResolver struct {
ctx context.Context
p podTemplateSpec
}
// Translate unmarshalled json into a deployment object
func mapToDeployment(
ctx context.Context,
jsonObj JsonObject) deployment {
ns := getNamespace(jsonObj)
return deployment{
mapToMetadata(ctx, ns, mapItem(jsonObj, "metadata")),
extractDeploymentSpec(ctx, ns, mapItem(jsonObj, "spec")),
nil,
nil,
nil}
}
func extractDeploymentSpec(ctx context.Context, ns string, jsonObj JsonObject) deploymentSpec {
jg := jgetter(jsonObj)
template := mapItem(jsonObj, "template")
return deploymentSpec{
jg.intItemOr("minReadySeconds", 0),
jg.boolItemOr("paused", false),
jg.intItemOr("progressDeadlineSeconds", 600),
jg.intItemOr("replicas", 1),
jg.intItemOr("revisionHistoryLimit", 10),
mapToSelector(jg.objItemOr("selector", nil)),
mapToStrategy(jg.objItemOr("strategy", nil)),
podTemplateSpec{
mapToMetadata(ctx, ns, mapItem(template, "metadata")),
mapToPodSpec(ctx, mapItem(template, "spec"))}}
}
func mapToSelector(sel *JsonObject) *labelSelector {
if sel == nil {
return nil
}
jg := jgetter(*sel)
exprs := jg.arrayItemOr("matchExpressions", nil)
labels := jg.objItemOr("matchLabels", nil)
var exprsVal *[]labelSelectorRequirement
if exprs != nil {
eslice := make([]labelSelectorRequirement, len(*exprs))
exprsVal = &eslice
for idx, lsr := range *exprs {
jg := jgetter(lsr.(JsonObject))
vals := jg.arrayItem("values")
strVals := make([]string, len(vals))
for sidx, sval := range vals {
strVals[sidx] = sval.(string)
}
(*exprsVal)[idx] = labelSelectorRequirement{
jg.stringItem("key"),
jg.stringItem("operator"),
strVals}
}
}
if labels != nil {
lslice := make([]label, len(*labels))
i := 0
for k, v := range *labels {
lslice[i] = label{k, v.(string)}
i = i + 1
}
return &labelSelector{exprsVal, &lslice}
}
empty := make([]label, 0)
return &labelSelector{exprsVal, &empty}
}
func mapToStrategy(strat *JsonObject) *deploymentStrategy {
if strat == nil {
return nil
}
jg := jgetter(*strat)
sType := jg.stringRefItemOr("type", nil)
var updateItem *JsonObject
if *sType == "RollingUpdate" {
updateItem = jg.objItemOr("rollingUpdate", nil)
}
if updateItem == nil {
return &deploymentStrategy{nil, sType}
}
sval, spresent := (*updateItem)["maxSurge"]
uval, upresent := (*updateItem)["maxUnavailable"]
var ss, su string
var is, iu int32
var ssptr *string = nil
var suptr *string = nil
var isptr *int32 = nil
var iuptr *int32 = nil
defval := "25%"
if !spresent {
ss = defval
ssptr = &ss
} else if ssval, ok := sval.(string); ok {
ss = ssval
ssptr = &ss
} else {
is = toGQLInt(sval)
isptr = &is
}
if !upresent {
su = defval
suptr = &su
} else if suval, ok := uval.(string); ok {
su = suval
suptr = &su
} else {
iu = toGQLInt(uval)
iuptr = &iu
}
return &deploymentStrategy{
&rollingUpdateDeployment{isptr, ssptr, iuptr, suptr},
sType}
}
// Retrieve the ReplicaSets comprising the deployment
func getReplicaSets(ctx context.Context, d deployment) *[]replicaSet {
depName := *d.Metadata.Name
depNamePrefix := depName + "-"
depNamespace := *d.Metadata.Namespace
rsets := getAllK8sObjsOfKindInNamespace(
ctx,
"ReplicaSet",
depNamespace,
func(jobj JsonObject) bool {
return (strings.HasPrefix(getName(jobj), depNamePrefix) &&
hasMatchingOwner(jobj, depName, DeploymentKind))
})
results := make([]replicaSet, len(rsets))
for idx, rs := range rsets {
rsr := rs.(*replicaSetResolver)
results[idx] = rsr.r
}
return &results
}
func (r *labelSelectorResolver) MatchExpressions() *[]labelSelectorRequirementResolver {
if r.l.MatchExpressions == nil {
empty := make([]labelSelectorRequirementResolver, 0)
return &empty
}
resolvers := make([]labelSelectorRequirementResolver,
len(*r.l.MatchExpressions))
for idx, val := range *r.l.MatchExpressions {
resolvers[idx] = labelSelectorRequirementResolver{r.ctx, val}
}
return &resolvers
}
func (r *labelSelectorResolver) MatchLabels() *[]labelResolver {
if r.l.MatchLabels == nil {
empty := make([]labelResolver, 0)
return &empty
}
resolvers := make([]labelResolver, len(*r.l.MatchLabels))
for idx, val := range *r.l.MatchLabels {
labelVal := val
resolvers[idx] = labelResolver{r.ctx, &labelVal}
}
return &resolvers
}
func (r labelSelectorRequirementResolver) Key() string {
return r.l.Key
}
func (r labelSelectorRequirementResolver) Operator() string {
return r.l.Operator
}
func (r labelSelectorRequirementResolver) Values() []string {
return r.l.Values
}
// Pod template spec implementations
func (r podTemplateSpecResolver) Metadata() metadataResolver {
return metadataResolver{r.ctx, r.p.Metadata}
}
func (r podTemplateSpecResolver) Spec() podSpecResolver {
return podSpecResolver{r.ctx, r.p.Spec}
}
// Resource method implementations
func (r *deploymentResolver) Kind() string {
return DeploymentKind
}
func (r *deploymentResolver) Metadata() metadataResolver {
return metadataResolver{r.ctx, r.d.Metadata}
}
func (r *deploymentResolver) Spec() deploymentSpecResolver {
return deploymentSpecResolver{r.ctx, r.d.Spec}
}
func (r *deploymentResolver) Owner() *resourceResolver {
return &resourceResolver{r.ctx, &deploymentResolver{r.ctx, r.d}}
}
func (r *deploymentResolver) RootOwner() *resourceResolver {
return &resourceResolver{r.ctx, &deploymentResolver{r.ctx, r.d}}
}
// Deployment spec implementations
func (r deploymentSpecResolver) MinReadySeconds() int32 {
return r.d.MinReadySeconds
}
func (r deploymentSpecResolver) Paused() bool {
return r.d.Paused
}
func (r deploymentSpecResolver) ProgressDeadlineSeconds() int32 {
return r.d.ProgressDeadlineSeconds
}
func (r deploymentSpecResolver) Replicas() int32 {
return r.d.Replicas
}
func (r deploymentSpecResolver) RevisionHistoryLimit() int32 {
return r.d.RevisionHistoryLimit
}
func (r deploymentSpecResolver) Selector() *labelSelectorResolver {
if r.d.Selector != nil {
return &labelSelectorResolver{r.ctx, *r.d.Selector}
}
return nil
}
func (r deploymentSpecResolver) Template() podTemplateSpecResolver {
return podTemplateSpecResolver{r.ctx, r.d.Template}
}
func (r deploymentSpecResolver) Strategy() *deploymentStrategyResolver {
return &deploymentStrategyResolver{r.ctx, r.d.Strategy}
}
// Resolve child ReplicaSets
func (r *deploymentResolver) ReplicaSets() []*replicaSetResolver {
if r.d.ReplicaSets == nil {
r.d.ReplicaSets = getReplicaSets(r.ctx, r.d)
}
var res []*replicaSetResolver
for _, rs := range *r.d.ReplicaSets {
res = append(res, &replicaSetResolver{r.ctx, rs})
}
if res == nil {
res = make([]*replicaSetResolver, 0)
}
return res
}
func (r deploymentStrategyResolver) RollingUpdate() *rollingUpdateDeploymentResolver {
if r.d.RollingUpdate == nil {
return nil
}
return &rollingUpdateDeploymentResolver{r.ctx, *r.d.RollingUpdate}
}
func (r deploymentStrategyResolver) Type() *string {
val := "RollingUpdate"
if r.d == nil || r.d.Type == nil {
return &val
}
return r.d.Type
}
func (r rollingUpdateDeploymentResolver) MaxSurgeInt() *int32 {
return r.r.MaxSurgeInt
}
func (r rollingUpdateDeploymentResolver) MaxUnavailableInt() *int32 {
return r.r.MaxUnavailableInt
}
func (r rollingUpdateDeploymentResolver) MaxSurgeString() *string {
return r.r.MaxSurgeString
}
func (r rollingUpdateDeploymentResolver) MaxUnavailableString() *string {
return r.r.MaxUnavailableString
}