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nafactory.go
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nafactory.go
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// Copyright 2017 Istio 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 vm
import (
"fmt"
"istio.io/istio/security/pkg/caclient/protocol"
"istio.io/istio/security/pkg/platform"
"istio.io/istio/security/pkg/util"
)
// NodeAgent interface that should be implemented by
// various platform specific node agents.
type NodeAgent interface {
Start() error
}
// NewNodeAgent is constructor for Node agent based on the provided Environment variable.
func NewNodeAgent(cfg *Config) (NodeAgent, error) {
if cfg == nil {
return nil, fmt.Errorf("nil configuration passed")
}
na := &nodeAgentInternal{
config: cfg,
certUtil: util.NewCertUtil(cfg.CAClientConfig.CSRGracePeriodPercentage),
}
pc, err := platform.NewClient(cfg.CAClientConfig.Env, cfg.CAClientConfig.RootCertFile, cfg.CAClientConfig.KeyFile,
cfg.CAClientConfig.CertChainFile, cfg.CAClientConfig.CAAddress)
if err != nil {
return nil, err
}
na.pc = pc
dialOpts, err := pc.GetDialOptions()
if err != nil {
return nil, err
}
grpcConn, err := protocol.NewGrpcConnection(cfg.CAClientConfig.CAAddress, dialOpts)
if err != nil {
return nil, err
}
na.caProtocol = grpcConn
return na, nil
}