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defaults-apiserver.go
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defaults-apiserver.go
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package acsengine
import (
"strconv"
"github.com/Azure/acs-engine/pkg/api"
"github.com/Azure/acs-engine/pkg/api/common"
"github.com/Azure/acs-engine/pkg/helpers"
)
func setAPIServerConfig(cs *api.ContainerService) {
o := cs.Properties.OrchestratorProfile
staticLinuxAPIServerConfig := map[string]string{
"--bind-address": "0.0.0.0",
"--advertise-address": "<kubernetesAPIServerIP>",
"--allow-privileged": "true",
"--anonymous-auth": "false",
"--audit-log-path": "/var/log/audit.log",
"--insecure-port": "8080",
"--secure-port": "443",
"--service-account-lookup": "true",
"--etcd-cafile": "/etc/kubernetes/certs/ca.crt",
"--etcd-certfile": "/etc/kubernetes/certs/etcdclient.crt",
"--etcd-keyfile": "/etc/kubernetes/certs/etcdclient.key",
"--etcd-servers": "https://127.0.0.1:" + strconv.Itoa(DefaultMasterEtcdClientPort),
"--etcd-quorum-read": "true",
"--tls-cert-file": "/etc/kubernetes/certs/apiserver.crt",
"--tls-private-key-file": "/etc/kubernetes/certs/apiserver.key",
"--client-ca-file": "/etc/kubernetes/certs/ca.crt",
"--profiling": "false",
"--repair-malformed-updates": "false",
"--service-account-key-file": "/etc/kubernetes/certs/apiserver.key",
"--kubelet-client-certificate": "/etc/kubernetes/certs/client.crt",
"--kubelet-client-key": "/etc/kubernetes/certs/client.key",
"--service-cluster-ip-range": o.KubernetesConfig.ServiceCIDR,
"--storage-backend": o.GetAPIServerEtcdAPIVersion(),
"--v": "4",
}
// Data Encryption at REST configuration
if helpers.IsTrueBoolPointer(o.KubernetesConfig.EnableDataEncryptionAtRest) {
staticLinuxAPIServerConfig["--experimental-encryption-provider-config"] = "/etc/kubernetes/encryption-config.yaml"
}
// Aggregated API configuration
if o.KubernetesConfig.EnableAggregatedAPIs || common.IsKubernetesVersionGe(o.OrchestratorVersion, "1.9.0") {
staticLinuxAPIServerConfig["--requestheader-client-ca-file"] = "/etc/kubernetes/certs/proxy-ca.crt"
staticLinuxAPIServerConfig["--proxy-client-cert-file"] = "/etc/kubernetes/certs/proxy.crt"
staticLinuxAPIServerConfig["--proxy-client-key-file"] = "/etc/kubernetes/certs/proxy.key"
staticLinuxAPIServerConfig["--requestheader-allowed-names"] = ""
staticLinuxAPIServerConfig["--requestheader-extra-headers-prefix"] = "X-Remote-Extra-"
staticLinuxAPIServerConfig["--requestheader-group-headers"] = "X-Remote-Group"
staticLinuxAPIServerConfig["--requestheader-username-headers"] = "X-Remote-User"
}
// Enable cloudprovider if we're not using cloud controller manager
if !helpers.IsTrueBoolPointer(o.KubernetesConfig.UseCloudControllerManager) {
staticLinuxAPIServerConfig["--cloud-provider"] = "azure"
staticLinuxAPIServerConfig["--cloud-config"] = "/etc/kubernetes/azure.json"
}
// AAD configuration
if cs.Properties.HasAadProfile() {
staticLinuxAPIServerConfig["--oidc-username-claim"] = "oid"
staticLinuxAPIServerConfig["--oidc-groups-claim"] = "groups"
staticLinuxAPIServerConfig["--oidc-client-id"] = "spn:" + cs.Properties.AADProfile.ServerAppID
issuerHost := "sts.windows.net"
if GetCloudTargetEnv(cs.Location) == "AzureChinaCloud" {
issuerHost = "sts.chinacloudapi.cn"
}
staticLinuxAPIServerConfig["--oidc-issuer-url"] = "https://" + issuerHost + "/" + cs.Properties.AADProfile.TenantID + "/"
}
// Audit Policy configuration
if common.IsKubernetesVersionGe(o.OrchestratorVersion, "1.8.0") {
staticLinuxAPIServerConfig["--audit-policy-file"] = "/etc/kubernetes/manifests/audit-policy.yaml"
}
staticWindowsAPIServerConfig := make(map[string]string)
for key, val := range staticLinuxAPIServerConfig {
staticWindowsAPIServerConfig[key] = val
}
// Windows apiserver config overrides
// TODO placeholder for specific config overrides for Windows clusters
// Default apiserver config
defaultAPIServerConfig := map[string]string{
"--admission-control": "NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,DenyEscalatingExec,AlwaysPullImages",
"--audit-log-maxage": "30",
"--audit-log-maxbackup": "10",
"--audit-log-maxsize": "100",
}
// RBAC configuration
if helpers.IsTrueBoolPointer(o.KubernetesConfig.EnableRbac) {
if common.IsKubernetesVersionGe(o.OrchestratorVersion, "1.7.0") {
defaultAPIServerConfig["--authorization-mode"] = "Node,RBAC"
} else {
defaultAPIServerConfig["--authorization-mode"] = "RBAC"
}
}
// Pod Security Policy configuration
if helpers.IsTrueBoolPointer(o.KubernetesConfig.EnablePodSecurityPolicy) {
defaultAPIServerConfig["--admission-control"] = defaultAPIServerConfig["--admission-control"] + ",PodSecurityPolicy"
}
// If no user-configurable apiserver config values exists, use the defaults
if o.KubernetesConfig.APIServerConfig == nil {
o.KubernetesConfig.APIServerConfig = defaultAPIServerConfig
} else {
for key, val := range defaultAPIServerConfig {
// If we don't have a user-configurable apiserver config for each option
if _, ok := o.KubernetesConfig.APIServerConfig[key]; !ok {
// then assign the default value
o.KubernetesConfig.APIServerConfig[key] = val
}
}
}
// We don't support user-configurable values for the following,
// so any of the value assignments below will override user-provided values
var overrideAPIServerConfig map[string]string
if cs.Properties.HasWindows() {
overrideAPIServerConfig = staticWindowsAPIServerConfig
} else {
overrideAPIServerConfig = staticLinuxAPIServerConfig
}
for key, val := range overrideAPIServerConfig {
o.KubernetesConfig.APIServerConfig[key] = val
}
// Remove flags for secure communication to kubelet, if configured
if !helpers.IsTrueBoolPointer(o.KubernetesConfig.EnableSecureKubelet) {
for _, key := range []string{"--kubelet-client-certificate", "--kubelet-client-key"} {
delete(o.KubernetesConfig.APIServerConfig, key)
}
}
}