discovery

package module
v0.1.6 Latest Latest
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 Go to latest Published: Jun 26, 2023 License: Apache-2.0 Imports: 3 Imported by: 0

README

discovery

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Border0 service discovery framework and library.

Example: Discover EC2, ECS, and RDS Resources

Assume that the following variables are defined as follows:

ctx := context.Background()

cfg, err := config.LoadDefaultConfig(ctx)
if err != nil {
	// handle error
}

Then,

// initialize a new one off engine
engine := engines.NewOneOffEngine(
	engines.OneOffEngineOptionWithDiscoverers(
		discoverers.NewAwsEc2Discoverer(cfg),
		discoverers.NewAwsEcsDiscoverer(cfg),
		discoverers.NewAwsRdsDiscoverer(cfg),
		// ... LAN, docker, k8s, gcp compute, azure vms, etc ...
	),
)

// create channels for discovery results
results := make(chan *discovery.Result, 10)

// run engine
go engine.Run(ctx, results)

// process results as they come in
for result := range results {
	// ... do something ...
}
Example: Continuously Discover EC2, ECS, and RDS Resources

Assume that the following variables are defined as follows:

Assume that ctx (type context.Context) is defined by some upstream code

cfg, err := config.LoadDefaultConfig(ctx)
if err != nil {
	// handle error
}

Then,

// initialize a new continuous engine
engine := engines.NewContinuousEngine(
	engines.WithDiscoverer(
		discoverers.NewAwsEc2Discoverer(cfg),
		engines.WithInitialInterval(time.Second*2),
	),
	engines.WithDiscoverer(
		discoverers.NewAwsEcsDiscoverer(cfg),
		engines.WithInitialInterval(time.Second*2),
	),
	engines.WithDiscoverer(
		discoverers.NewAwsRdsDiscoverer(cfg),
		engines.WithInitialInterval(time.Second*2),
	),
)

// create channels for discovery results
results := make(chan *discovery.Result, 10)

// run engine
go engine.Run(ctx, results)

// process results as they come in
for result := range results {
	// ... do something ...
}
Example: Discover EC2 Instances In Multiple AWS Regions

Assume that the following variables are defined as follows:

awsRegions := []string{"us-east-1", "us-east-2", "us-west-2", "eu-west-1"}

ctx := context.Background()
cfg, err := config.LoadDefaultConfig(ctx)
if err != nil {
	// handle error
}

Then,

// define an ec2 discoverer for each region
ds := []discovery.Discoverer{}
for _, region := range regions {
	cfg.Region = region

	ds = append(ds, discoverers.NewAwsEc2Discoverer(cfg))
}

// initialize a new one off engine with the discoverers
engine := engines.NewOneOffEngine(
	engines.OneOffEngineOptionWithDiscoverers(ds...),
)

// create channels for discovery results
results := make(chan *discovery.Result, 10)

// run engine
go engine.Run(ctx, results)

// process results as they come in
for result := range results {
	// ... do something ...
}

Documentation

Index

Constants

View Source 
const (
	// ResourceTypeAwsEc2Instance is the resource type for AWS EC2 instances.
	ResourceTypeAwsEc2Instance = "aws_ec2_instance"

	// ResourceTypeAwsEcsCluster is the resource type for AWS ECS clusters.
	ResourceTypeAwsEcsCluster = "aws_ecs_cluster"

	// ResourceTypeAwsRdsInstnace is the resource type for AWS RDS instances.
	ResourceTypeAwsRdsInstance = "aws_rds_instance"

	// ResourceTypeAwsSsmTarget is the resource type for AWS SSM targets.
	ResourceTypeAwsSsmTarget = "aws_ssm_target"

	// ResourceTypeKubernetesPod is the resource type for kubernetes pods.
	ResourceTypeKubernetesPod = "kubernetes_pod"

	// ResourceTypeLocalDockerContainer is the resource type for containers managed by the local Docker daemon.
	ResourceTypeLocalDockerContainer = "local_docker_container"

	// ResourceTypeNetworkHttpServer is the resource type for network-reachable HTTP servers.
	ResourceTypeNetworkHttpServer = "network_http_server"

	// ResourceTypeNetworkHttpsServer is the resource type for network-reachable HTTPS servers.
	ResourceTypeNetworkHttpsServer = "network_https_server"

	// ResourceTypeNetworkMysqlServer is the resource type for network-reachable MySQL servers.
	ResourceTypeNetworkMysqlServer = "network_mysql_server"

	// ResourceTypeNetworkPostgresqlServer is the resource type for network-reachable PostgreSQL servers.
	ResourceTypeNetworkPostgresqlServer = "network_postgresql_server"

	// ResourceTypeNetworkSshServer is the resource type for network-reachable SSH servers.
	ResourceTypeNetworkSshServer = "network_ssh_server"
)

Variables

This section is empty.

Functions

This section is empty.

Types

type AwsBaseDetails 

type AwsBaseDetails struct {
	AwsAccountId string `json:"aws_account_id"`
	AwsRegion    string `json:"aws_region"`
	AwsArn       string `json:"aws_arn"`
}

AwsBaseDetails represents the details of a discovered generic AWS resource.

type AwsEc2InstanceDetails 

type AwsEc2InstanceDetails struct {
	AwsBaseDetails // extends

	Tags map[string]string `json:"tags"`

	InstanceId       string `json:"instance_id"`
	ImageId          string `json:"ami_id"`
	VpcId            string `json:"vpc_id"`
	SubnetId         string `json:"subnet_id"`
	PrivateDnsName   string `json:"private_dns_name"`
	PrivateIpAddress string `json:"private_ip_address"`
	PublicDnsName    string `json:"public_dns_name"`
	PublicIpAddress  string `json:"public_ip_address"`
	InstanceType     string `json:"instance_type"`
}

AwsEc2InstanceDetails represents the details of a discovered AWS EC2 instance.

type AwsEcsClusterDetails 

type AwsEcsClusterDetails struct {
	AwsBaseDetails // extends

	Tags map[string]string `json:"tags"`

	ClusterName string   `json:"cluster_name"`
	Services    []string `json:"services"`
	Tasks       []string `json:"tasks"`
	Containers  []string `json:"containers"`
}

AwsEcsClusterDetails represents the details of a discovered AWS ECS cluster.

type AwsRdsInstanceDetails 

type AwsRdsInstanceDetails struct {
	AwsBaseDetails // extends

	Tags map[string]string `json:"tags"`

	DBInstanceIdentifier string `json:"db_instance_identifier"`
	Engine               string `json:"engine"`
	EngineVersion        string `json:"engine_version"`
	VpcId                string `json:"vpc_id"`
	DBSubnetGroupName    string `json:"db_subnet_group_name"`
	EndpointAddress      string `json:"endpoint_address"`
	EndpointPort         int32  `json:"endpoint_port"`
}

AwsRdsInstanceDetails represents the details of a discovered AWS RDS instance.

type AwsSsmTargetDetails added in v0.1.3 

type AwsSsmTargetDetails struct {
	AwsBaseDetails // extends

	InstanceId string `json:"instance_id"`
}

AwsSsmTargetDetails represents the details of a discovered AWS SSM target.

type Discoverer 

type Discoverer interface {
	Discover(context.Context) *Result
}

Discoverer represents an entity capable of discovering resources.

type Engine added in v0.1.0 

type Engine interface {
	Run(context.Context, chan<- *Result)
}

Engine represents an entity capable of managing discovery jobs.

An Engine has three responsibilities: - Write zero or more results to the channel - Close the channel as soon as they are done with it - Exit gracefully upon the context being done

type KubernetesContainerDetails added in v0.1.5 

type KubernetesContainerDetails struct {
	Name  string `json:"name"`
	Image string `json:"image"`
}

KubernetesContainerDetails represents the details of a discovered kubernetes container.

type KubernetesPodDetails added in v0.1.5 

type KubernetesPodDetails struct {
	Namespace   string                       `json:"namespace"`
	PodName     string                       `json:"pod_name"`
	PodIP       string                       `json:"pod_ip"`
	NodeName    string                       `json:"node_name"`
	Status      string                       `json:"status"`
	Containers  []KubernetesContainerDetails `json:"containers"`
	Labels      map[string]string            `json:"labels"`
	Annotations map[string]string            `json:"annotations"`
}

KubernetesPodDetails represents the details of a discovered kubernetes pod.

type LocalDockerContainerDetails added in v0.1.5 

type LocalDockerContainerDetails struct {
	ContainerId  string            `json:"container_id"`
	Status       string            `json:"status"`
	Image        string            `json:"image"`
	Names        []string          `json:"names"`
	PortBindings map[string]string `json:"port_bindings"`
	Labels       map[string]string `json:"labels"`
}

LocalDockerContainerDetails represents the details of a discovered container managed by the local Docker daemon.

type Metadata added in v0.1.3 

type Metadata struct {
	DiscovererId string    `json:"discoverer_id"`
	StartedAt    time.Time `json:"started_at"`
	EndedAt      time.Time `json:"ended_at"`
}

Metadata represents metadata for a result.

type NetworkBaseDetails added in v0.1.4 

type NetworkBaseDetails struct {
	Addresses []string `json:"addresses"`
	HostNames []string `json:"hostnames,omitempty"`
	Port      string   `json:"port"`
}

NetworkBaseDetails represents the details of a discovered generic service on the network.

type NetworkHttpServerDetails added in v0.1.4 

type NetworkHttpServerDetails struct {
	NetworkBaseDetails // extends

}

NetworkHttpServerDetails represents the details of a discovered HTTP server on the network.

type NetworkHttpsServerDetails added in v0.1.4 

type NetworkHttpsServerDetails struct {
	NetworkBaseDetails // extends

}

NetworkHttpsServerDetails represents the details of a discovered HTTPS server on the network.

type NetworkMysqlServerDetails added in v0.1.4 

type NetworkMysqlServerDetails struct {
	NetworkBaseDetails // extends

}

NetworkMysqlServerDetails represents the details of a discovered MySQL server on the network.

type NetworkPostgresqlServerDetails added in v0.1.4 

type NetworkPostgresqlServerDetails struct {
	NetworkBaseDetails // extends

}

NetworkPostgresqlServerDetails represents the details of a discovered PostgreSQL server on the network.

type NetworkSshServerDetails added in v0.1.4 

type NetworkSshServerDetails struct {
	NetworkBaseDetails // extends

}

NetworkSshServerDetails represents the details of a discovered SSH server on the network.

type Resource 

type Resource struct {
	ResourceType string `json:"resource_type"`

	AwsEc2InstanceDetails          *AwsEc2InstanceDetails          `json:"aws_ec2_instance_details,omitempty"`
	AwsEcsClusterDetails           *AwsEcsClusterDetails           `json:"aws_ecs_cluster_details,omitempty"`
	AwsRdsInstanceDetails          *AwsRdsInstanceDetails          `json:"aws_rds_instance_details,omitempty"`
	AwsSsmTargetDetails            *AwsSsmTargetDetails            `json:"aws_ssm_target_details,omitempty"`
	KubernetesPodDetails           *KubernetesPodDetails           `json:"kubernetes_pod_details,omitempty"`
	LocalDockerContainerDetails    *LocalDockerContainerDetails    `json:"local_docker_container_details,omitempty"`
	NetworkHttpServerDetails       *NetworkHttpServerDetails       `json:"network_http_server_details,omitempty"`
	NetworkHttpsServerDetails      *NetworkHttpsServerDetails      `json:"network_https_server_details,omitempty"`
	NetworkMysqlServerDetails      *NetworkMysqlServerDetails      `json:"network_mysql_server_details,omitempty"`
	NetworkPostgresqlServerDetails *NetworkPostgresqlServerDetails `json:"network_postgresql_server_details,omitempty"`
	NetworkSshServerDetails        *NetworkSshServerDetails        `json:"network_ssh_server_details,omitempty"`
}

Resource represents a generic discovered resource.

type Result added in v0.1.0 

type Result struct {
	sync.Mutex // inherit lock behaviour

	Resources []Resource `json:"resources"`
	Errors    []string   `json:"errors"`
	Metadata  Metadata   `json:"metadata"`
}

Result represents the result of a discoverer.

func NewResult added in v0.1.0 

func NewResult(discovererId string) *Result

NewResult returns a new Result object with the StartedAt time set to the current time.

func (*Result) AddError added in v0.1.1 

func (r *Result) AddError(err error)

AddError adds an error to a result

func (*Result) AddResources added in v0.1.3 

func (r *Result) AddResources(resources ...Resource)

AddResources adds resources to a result

func (*Result) Done added in v0.1.0 

func (r *Result) Done()

Done sets the EndedAt time in a Result to the current time.

Source Files

View all Source files

Directories

Path Synopsis
__examples__
aws_continuous command
aws_multiregion command
aws_oneoff command
docker_oneoff command
network_oneoff command

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