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updater.go
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updater.go
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// Copyright 2021 The PipeCD Authors.
//
// 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 deploymentchaincontroller
import (
"context"
"time"
"go.uber.org/zap"
"github.com/pipe-cd/pipecd/pkg/datastore"
"github.com/pipe-cd/pipecd/pkg/model"
)
// updater watches for a specified deployment model object
// and updates the state of that object based on states of
// its deployments.
type updater struct {
deploymentChainID string
// applicationRefs contains list of all applications of
// the current handling deployment chain.
applicationRefs []*model.ChainApplicationRef
// deploymentRefs is a map with key is the application id and
// value is the last state of deployment ref to the deployment
// of that in chain application.
deploymentRefs map[string]*model.ChainDeploymentRef
deploymentStore deploymentStore
deploymentChainStore deploymentChainStore
done bool
doneTimestamp time.Time
logger *zap.Logger
nowFunc func() time.Time
}
func newUpdater(
dc *model.DeploymentChain,
ds deploymentStore,
dcs deploymentChainStore,
lg *zap.Logger,
) *updater {
return &updater{
deploymentChainID: dc.Id,
applicationRefs: dc.ListAllInChainApplications(),
deploymentRefs: dc.ListAllInChainApplicationDeploymentsMap(),
deploymentStore: ds,
deploymentChainStore: dcs,
logger: lg,
nowFunc: time.Now,
}
}
func (u *updater) IsDone() bool {
return u.done
}
func (u *updater) Run(ctx context.Context) error {
// In case all in chain applications' deployments are completed
// mark the updater as done and return immediately.
if u.isAllInChainDeploymentsCompleted() {
if !u.done {
u.done = true
u.doneTimestamp = u.nowFunc()
}
return nil
}
// Check state of all deployment which existed from previous interval.
if len(u.deploymentRefs) != 0 {
for _, deploymentRef := range u.deploymentRefs {
// Ignore finished deployment.
if deploymentRef.Status.IsCompleted() {
continue
}
deployment, err := u.deploymentStore.Get(ctx, deploymentRef.DeploymentId)
if err != nil {
u.logger.Error("failed while update deployment chain: can not get deployment",
zap.String("deploymentChainId", u.deploymentChainID),
zap.String("deploymentId", deploymentRef.DeploymentId),
zap.Error(err),
)
return err
}
// Update the deployment state in deployment chain model in case
// the deployment state is changed.
if deployment.Status != deploymentRef.Status {
if err = u.deploymentChainStore.UpdateNodeDeploymentStatus(
ctx,
u.deploymentChainID,
deployment.DeploymentChainBlockIndex,
deployment.Id,
deployment.Status,
deployment.StatusReason,
); err != nil {
u.logger.Error("failed to update state of deployment in chain",
zap.String("deploymentChainId", u.deploymentChainID),
zap.String("deploymentId", deployment.Id),
zap.Error(err),
)
return err
}
// Update updater's deploymentRefs.
deploymentRef.Status = deployment.Status
deploymentRef.StatusReason = deployment.StatusReason
}
}
}
// If not all applications in chain has its deployment ref
// fetch all missing deployments and link the deployment ref to them.
if len(u.deploymentRefs) != len(u.applicationRefs) {
deployments, err := u.listAllMissingDeployments(ctx)
if err != nil {
return err
}
// Note: Only the deployment of the first block (the deployment which trigger this chain)
// is added at the time we created this deployment chain; thus all other deployments
// which be counted as "missng deployments" here are triggered and going to be added under
// PENDING state, since those deployments are of blocks which have to wait for its previous
// blocks completion. We don't need to care about updating those deployment ref status after
// they been added here in this interval.
for _, deployment := range deployments {
// Connect missing deployment to the chain.
if err := u.deploymentChainStore.AddNodeDeployment(ctx, u.deploymentChainID, deployment); err != nil {
u.logger.Error("failed to link deployments to its chain",
zap.String("deploymentChainId", u.deploymentChainID),
zap.String("deploymentId", deployment.Id),
zap.Error(err),
)
return err
}
// Store deployment ref to the updater's deploymentRefs.
u.deploymentRefs[deployment.ApplicationId] = &model.ChainDeploymentRef{
DeploymentId: deployment.Id,
Status: deployment.Status,
StatusReason: deployment.StatusReason,
}
}
}
return nil
}
func (u *updater) listAllMissingDeployments(ctx context.Context) ([]*model.Deployment, error) {
noDeploymentApps := make(map[string]interface{}, len(u.applicationRefs))
for _, appRef := range u.applicationRefs {
if _, ok := u.deploymentRefs[appRef.ApplicationId]; !ok {
noDeploymentApps[appRef.ApplicationId] = nil
}
}
// Fetch all available deployments in chain.
options := datastore.ListOptions{
Filters: []datastore.ListFilter{
{
Field: "DeploymentChainId",
Operator: datastore.OperatorEqual,
Value: u.deploymentChainID,
},
},
}
deployments, _, err := u.deploymentStore.List(ctx, options)
if err != nil {
u.logger.Error("failed to fetch all deployments in chain",
zap.String("deploymentChainId", u.deploymentChainID),
zap.Error(err),
)
return nil, err
}
missingDeployments := make([]*model.Deployment, 0, len(noDeploymentApps))
for _, deployment := range deployments {
if _, ok := noDeploymentApps[deployment.ApplicationId]; ok {
missingDeployments = append(missingDeployments, deployment)
}
}
return missingDeployments, nil
}
func (u *updater) isAllInChainDeploymentsCompleted() bool {
if len(u.applicationRefs) != len(u.deploymentRefs) {
return false
}
for _, dr := range u.deploymentRefs {
if !dr.Status.IsCompleted() {
return false
}
}
return true
}