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argocd_application_controller.go
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/
argocd_application_controller.go
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package commands
import (
"context"
"math"
"time"
"github.com/argoproj/pkg/stats"
"github.com/go-redis/redis/v8"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"github.com/argoproj/argo-cd/common"
"github.com/argoproj/argo-cd/controller"
"github.com/argoproj/argo-cd/controller/sharding"
"github.com/argoproj/argo-cd/pkg/apis/application/v1alpha1"
appclientset "github.com/argoproj/argo-cd/pkg/client/clientset/versioned"
"github.com/argoproj/argo-cd/reposerver/apiclient"
cacheutil "github.com/argoproj/argo-cd/util/cache"
appstatecache "github.com/argoproj/argo-cd/util/cache/appstate"
"github.com/argoproj/argo-cd/util/cli"
"github.com/argoproj/argo-cd/util/env"
"github.com/argoproj/argo-cd/util/errors"
kubeutil "github.com/argoproj/argo-cd/util/kube"
"github.com/argoproj/argo-cd/util/settings"
)
const (
// CLIName is the name of the CLI
cliName = "argocd-application-controller"
// Default time in seconds for application resync period
defaultAppResyncPeriod = 180
)
func NewCommand() *cobra.Command {
var (
clientConfig clientcmd.ClientConfig
appResyncPeriod int64
repoServerAddress string
repoServerTimeoutSeconds int
selfHealTimeoutSeconds int
statusProcessors int
operationProcessors int
logFormat string
logLevel string
glogLevel int
metricsPort int
kubectlParallelismLimit int64
cacheSrc func() (*appstatecache.Cache, error)
redisClient *redis.Client
)
var command = cobra.Command{
Use: cliName,
Short: "Run ArgoCD Application Controller",
Long: "ArgoCD application controller is a Kubernetes controller that continuously monitors running applications and compares the current, live state against the desired target state (as specified in the repo). This command runs Application Controller in the foreground. It can be configured by following options.",
DisableAutoGenTag: true,
RunE: func(c *cobra.Command, args []string) error {
cli.SetLogFormat(logFormat)
cli.SetLogLevel(logLevel)
cli.SetGLogLevel(glogLevel)
config, err := clientConfig.ClientConfig()
errors.CheckError(err)
errors.CheckError(v1alpha1.SetK8SConfigDefaults(config))
kubeClient := kubernetes.NewForConfigOrDie(config)
appClient := appclientset.NewForConfigOrDie(config)
namespace, _, err := clientConfig.Namespace()
errors.CheckError(err)
resyncDuration := time.Duration(appResyncPeriod) * time.Second
repoClientset := apiclient.NewRepoServerClientset(repoServerAddress, repoServerTimeoutSeconds)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
cache, err := cacheSrc()
errors.CheckError(err)
cache.Cache.SetClient(cacheutil.NewTwoLevelClient(cache.Cache.GetClient(), 10*time.Minute))
settingsMgr := settings.NewSettingsManager(ctx, kubeClient, namespace)
kubectl := kubeutil.NewKubectl()
clusterFilter := getClusterFilter()
appController, err := controller.NewApplicationController(
namespace,
settingsMgr,
kubeClient,
appClient,
repoClientset,
cache,
kubectl,
resyncDuration,
time.Duration(selfHealTimeoutSeconds)*time.Second,
metricsPort,
kubectlParallelismLimit,
clusterFilter)
errors.CheckError(err)
cacheutil.CollectMetrics(redisClient, appController.GetMetricsServer())
vers := common.GetVersion()
log.Infof("Application Controller (version: %s, built: %s) starting (namespace: %s)", vers.Version, vers.BuildDate, namespace)
stats.RegisterStackDumper()
stats.StartStatsTicker(10 * time.Minute)
stats.RegisterHeapDumper("memprofile")
go appController.Run(ctx, statusProcessors, operationProcessors)
// Wait forever
select {}
},
}
clientConfig = cli.AddKubectlFlagsToCmd(&command)
command.Flags().Int64Var(&appResyncPeriod, "app-resync", defaultAppResyncPeriod, "Time period in seconds for application resync.")
command.Flags().StringVar(&repoServerAddress, "repo-server", common.DefaultRepoServerAddr, "Repo server address.")
command.Flags().IntVar(&repoServerTimeoutSeconds, "repo-server-timeout-seconds", 60, "Repo server RPC call timeout seconds.")
command.Flags().IntVar(&statusProcessors, "status-processors", 1, "Number of application status processors")
command.Flags().IntVar(&operationProcessors, "operation-processors", 1, "Number of application operation processors")
command.Flags().StringVar(&logFormat, "logformat", "text", "Set the logging format. One of: text|json")
command.Flags().StringVar(&logLevel, "loglevel", "info", "Set the logging level. One of: debug|info|warn|error")
command.Flags().IntVar(&glogLevel, "gloglevel", 0, "Set the glog logging level")
command.Flags().IntVar(&metricsPort, "metrics-port", common.DefaultPortArgoCDMetrics, "Start metrics server on given port")
command.Flags().IntVar(&selfHealTimeoutSeconds, "self-heal-timeout-seconds", 5, "Specifies timeout between application self heal attempts")
command.Flags().Int64Var(&kubectlParallelismLimit, "kubectl-parallelism-limit", 20, "Number of allowed concurrent kubectl fork/execs. Any value less the 1 means no limit.")
cacheSrc = appstatecache.AddCacheFlagsToCmd(&command, func(client *redis.Client) {
redisClient = client
})
return &command
}
func getClusterFilter() func(cluster *v1alpha1.Cluster) bool {
replicas := env.ParseNumFromEnv(common.EnvControllerReplicas, 0, 0, math.MaxInt32)
shard := env.ParseNumFromEnv(common.EnvControllerShard, -1, -math.MaxInt32, math.MaxInt32)
var clusterFilter func(cluster *v1alpha1.Cluster) bool
if replicas > 1 {
if shard < 0 {
var err error
shard, err = sharding.InferShard()
errors.CheckError(err)
}
log.Infof("Processing clusters from shard %d", shard)
clusterFilter = sharding.GetClusterFilter(replicas, shard)
} else {
log.Info("Processing all cluster shards")
}
return clusterFilter
}