github.com/m3db/m3@v1.5.0/src/cmd/services/m3em_agent/config/config.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package agentmain
    22  
    23  import (
    24  	"io/ioutil"
    25  
    26  	xgrpc "github.com/m3db/m3/src/m3em/x/grpc"
    27  
    28  	tallym3 "github.com/uber-go/tally/m3"
    29  	"google.golang.org/grpc/credentials"
    30  )
    31  
    32  // Configuration is a collection of knobs to configure m3em_agent processes
    33  type Configuration struct {
    34  	Server  ServerConfiguration  `yaml:"server"`
    35  	Metrics MetricsConfiguration `yaml:"metrics"`
    36  	Agent   AgentConfiguration   `yaml:"agent"`
    37  }
    38  
    39  // AgentConfiguration is a collection of knobs to configure agents
    40  type AgentConfiguration struct {
    41  	WorkingDir  string            `yaml:"workingDir" validate:"nonzero"`
    42  	StartupCmds []ExecCommand     `yaml:"startupCmds"`
    43  	ReleaseCmds []ExecCommand     `yaml:"releaseCmds"`
    44  	TestEnvVars map[string]string `yaml:"testEnvVars"`
    45  }
    46  
    47  // ExecCommand is an executable command
    48  type ExecCommand struct {
    49  	Path string   `yaml:"path" validate:"nonzero"`
    50  	Args []string `yaml:"args"`
    51  }
    52  
    53  // MetricsConfiguration is a collection of knobs to configure metrics collection
    54  type MetricsConfiguration struct {
    55  	Prefix     string                `yaml:"prefix"`
    56  	SampleRate float64               `yaml:"sampleRate" validate:"min=0.01,max=1.0"`
    57  	M3         tallym3.Configuration `yaml:"m3"         validate:"nonzero"`
    58  }
    59  
    60  // ServerConfiguration is a collection of knobs to control grpc server configuration
    61  type ServerConfiguration struct {
    62  	ListenAddress string            `yaml:"listenAddress" validate:"nonzero"`
    63  	DebugAddress  string            `yaml:"debugAddress"  validate:"nonzero"`
    64  	TLS           *TLSConfiguration `yaml:"tls"`
    65  }
    66  
    67  // TLSConfiguration are the resources required for TLS Communication
    68  type TLSConfiguration struct {
    69  	CACrtPath     string `yaml:"caCrt" validate:"nonzero"`
    70  	ServerCrtPath string `yaml:"serverCrt" validate:"nonzero"`
    71  	ServerKeyPath string `yaml:"serverKey" validate:"nonzero"`
    72  }
    73  
    74  // Credentials returns the TransportCredentials corresponding to the provided struct
    75  func (t TLSConfiguration) Credentials() (credentials.TransportCredentials, error) {
    76  	caCrt, err := ioutil.ReadFile(t.CACrtPath)
    77  	if err != nil {
    78  		return nil, err
    79  	}
    80  
    81  	serverCrt, err := ioutil.ReadFile(t.ServerCrtPath)
    82  	if err != nil {
    83  		return nil, err
    84  	}
    85  
    86  	serverKey, err := ioutil.ReadFile(t.ServerKeyPath)
    87  	if err != nil {
    88  		return nil, err
    89  	}
    90  
    91  	return xgrpc.NewServerCredentials(caCrt, serverCrt, serverKey)
    92  }