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template.go
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template.go
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package v1alpha1
import (
"context"
"fmt"
"sort"
"strings"
"github.com/caicloud/nirvana/log"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/util/retry"
"github.com/caicloud/cyclone/pkg/apis/cyclone/v1alpha1"
c_common "github.com/caicloud/cyclone/pkg/common"
"github.com/caicloud/cyclone/pkg/meta"
"github.com/caicloud/cyclone/pkg/server/biz/utils"
"github.com/caicloud/cyclone/pkg/server/common"
"github.com/caicloud/cyclone/pkg/server/handler"
"github.com/caicloud/cyclone/pkg/server/handler/v1alpha1/sorter"
"github.com/caicloud/cyclone/pkg/server/types"
"github.com/caicloud/cyclone/pkg/util/cerr"
)
const (
// TemplateTypeBuiltin represents the type of builtin templates.
TemplateTypeBuiltin = "builtin"
// TemplateTypeCustom represents the type of custom templates.
TemplateTypeCustom = "custom"
)
// ListTemplates get templates the given tenant has access to.
// - ctx Context of the reqeust
// - tenant Tenant
// - includePublic Whether to include system level stage templates, default to true
// - query Query params includes start, limit and filter.
func ListTemplates(ctx context.Context, tenant string, includePublic bool, query *types.QueryParams) (*types.ListResponse, error) {
// TODO(ChenDe): Need a more efficient way to get paged items.
templates, err := handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).List(metav1.ListOptions{
LabelSelector: meta.StageTemplateSelector(),
})
if err != nil {
log.Errorf("Get templates from k8s with tenant %s error: %v", tenant, err)
return nil, err
}
items := templates.Items
if includePublic && tenant != common.DefaultTenant {
systemNamespace := c_common.GetSystemNamespace()
publicTemplates, err := handler.K8sClient.CycloneV1alpha1().Stages(systemNamespace).List(metav1.ListOptions{
LabelSelector: meta.StageTemplateSelector() + "," + meta.BuiltinLabelSelector(),
})
if err != nil {
log.Errorf("Get templates from system namespace %s error: %v", systemNamespace, err)
return nil, err
}
items = append(items, publicTemplates.Items...)
}
var results []v1alpha1.Stage
if query.Filter == "" {
results = items
} else {
results, err = filterTemplates(items, query.Filter)
if err != nil {
return nil, err
}
}
size := uint64(len(results))
if query.Start >= size {
return types.NewListResponse(int(size), []v1alpha1.Stage{}), nil
}
end := query.Start + query.Limit
if end > size {
end = size
}
if query.Sort {
sort.Sort(sorter.NewStageSorter(items, query.Ascending))
}
return types.NewListResponse(int(size), results[query.Start:end]), nil
}
func filterTemplates(stages []v1alpha1.Stage, filter string) ([]v1alpha1.Stage, error) {
if filter == "" {
return stages, nil
}
var results []v1alpha1.Stage
// Support multiple filters rules: name or alias, and type, separated with comma.
filterParts := strings.Split(filter, ",")
filters := make(map[string]string)
for _, part := range filterParts {
kv := strings.Split(part, "=")
if len(kv) != 2 {
return nil, cerr.ErrorQueryParamNotCorrect.Error(filter)
}
if kv[0] == queryFilterType {
if kv[1] != TemplateTypeBuiltin && kv[1] != TemplateTypeCustom {
return nil, cerr.ErrorValidationFailed.Error(filter, fmt.Errorf("template types only support: %s, %s", TemplateTypeBuiltin, TemplateTypeCustom))
}
}
filters[kv[0]] = strings.ToLower(kv[1])
}
var selected bool
for _, item := range stages {
selected = true
for key, value := range filters {
switch key {
case queryFilterName:
if !strings.Contains(item.Name, value) {
selected = false
}
case queryFilterAlias:
if item.Annotations != nil {
if alias, ok := item.Annotations[meta.AnnotationAlias]; ok {
if strings.Contains(alias, value) {
continue
}
}
}
selected = false
case queryFilterType:
if item.Labels != nil {
// Templates will be skipped when meet one of the conditions:
// * there is builtin label, and the query type is custom
// * there is no builtin label, but the query type is builtin
_, ok := item.Labels[meta.LabelBuiltin]
if (ok && (value == TemplateTypeCustom)) || (!ok && (value == TemplateTypeBuiltin)) {
selected = false
}
}
}
}
if selected {
results = append(results, item)
}
}
return results, nil
}
// CreateTemplate creates a stage template for the tenant. 'stage' describe the template to create. Stage templates
// are special stages, with 'stage.cyclone.dev/template' label. If created successfully, return the create template.
func CreateTemplate(ctx context.Context, tenant string, stage *v1alpha1.Stage) (*v1alpha1.Stage, error) {
modifiers := []CreationModifier{GenerateNameModifier}
for _, modifier := range modifiers {
err := modifier(tenant, "", "", stage)
if err != nil {
return nil, err
}
}
stage.Labels = meta.AddStageTemplateLabel(stage.Labels)
return handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).Create(stage)
}
// GetTemplate gets a stage template with the given template name under given tenant.
func GetTemplate(ctx context.Context, tenant, template string, includePublic bool) (stage *v1alpha1.Stage, err error) {
// Convert the returned error if it is a k8s error.
defer func() {
err = cerr.ConvertK8sError(err)
}()
stage, err = handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).Get(template, metav1.GetOptions{})
if err != nil {
if !errors.IsNotFound(err) {
return nil, err
}
if includePublic {
systemNamespace := c_common.GetSystemNamespace()
publicTemplate, err := handler.K8sClient.CycloneV1alpha1().Stages(systemNamespace).Get(template, metav1.GetOptions{})
if err != nil {
log.Errorf("Get templates from system namespace %s error: %v", systemNamespace, err)
return nil, err
}
return publicTemplate, nil
}
return nil, err
}
return stage, nil
}
// UpdateTemplate updates a stage templates with the given tenant name and template name. If updated successfully, return
// the updated template.
func UpdateTemplate(ctx context.Context, tenant, template string, stage *v1alpha1.Stage) (*v1alpha1.Stage, error) {
err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
origin, err := handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).Get(template, metav1.GetOptions{})
if err != nil {
return err
}
newStage := origin.DeepCopy()
newStage.Spec = stage.Spec
newStage.Annotations = utils.MergeMap(stage.Annotations, newStage.Annotations)
newStage.Labels = utils.MergeMap(stage.Labels, newStage.Labels)
_, err = handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).Update(newStage)
return err
})
if err != nil {
return nil, cerr.ConvertK8sError(err)
}
return stage, nil
}
// DeleteTemplate deletes a stage template with the given tenant and template name.
func DeleteTemplate(ctx context.Context, tenant, template string) error {
err := handler.K8sClient.CycloneV1alpha1().Stages(common.TenantNamespace(tenant)).Delete(template, &metav1.DeleteOptions{})
return cerr.ConvertK8sError(err)
}