mirror of
https://github.com/adammck/terraform-inventory
synced 2024-11-22 20:01:58 +01:00
Merge pull request #2 from adammck/remove_terraform_dependency
Remove Terraform Dependency
This commit is contained in:
Adam Mckaig
commit
50e6962e46
48
cli.go
Normal file
48
cli.go
Normal file
@ -0,0 +1,48 @@
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package main
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import (
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"encoding/json"
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"fmt"
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"io"
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)
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func cmdList(stdout io.Writer, stderr io.Writer, s *state) int {
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groups := make(map[string][]string, 0)
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// add each instance as a pseudo-group, so they can be provisioned
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// individually where necessary.
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for name, inst := range s.instances() {
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groups[name] = []string{inst.Attributes["private_ip"]}
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}
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return output(stdout, stderr, groups)
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}
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func cmdHost(stdout io.Writer, stderr io.Writer, s *state, hostname string) int {
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for _, inst := range s.instances() {
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if hostname == inst.Attributes["private_ip"] {
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return output(stdout, stderr, inst.Attributes)
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}
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}
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fmt.Fprintf(stderr, "No such host: %s\n", hostname)
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return 1
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}
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// output marshals an arbitrary JSON object and writes it to stdout, or writes
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// an error to stderr, then returns the appropriate exit code.
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func output(stdout io.Writer, stderr io.Writer, whatever interface{}) int {
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b, err := json.Marshal(whatever)
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if err != nil {
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fmt.Fprintf(stderr, "Error encoding JSON: %s\n", err)
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return 1
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}
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_, err = stdout.Write(b)
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if err != nil {
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fmt.Fprintf(stderr, "Error writing JSON: %s\n", err)
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return 1
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}
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return 0
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}
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1
cli_test.go
Normal file
1
cli_test.go
Normal file
@ -0,0 +1 @@
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package main
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114
fixtures/example.tfstate
Normal file
114
fixtures/example.tfstate
Normal file
@ -0,0 +1,114 @@
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{
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"version": 1,
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"serial": 1,
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"modules": [
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{
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"path": [
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"root"
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],
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"outputs": {},
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"resources": {
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"aws_instance.one": {
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"type": "aws_instance",
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"depends_on": [
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"aws_security_group.example"
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],
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"primary": {
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"id": "i-aaaaaaaa",
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"attributes": {
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"ami": "ami-XXXXXXXX",
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"availability_zone": "us-east-1b",
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"id": "i-aaaaaaaa",
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"instance_type": "t2.micro",
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"key_name": "",
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"private_dns": "ip-1-1-1-1.ec2.internal",
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"private_ip": "1.1.1.1",
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"public_dns": "",
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"public_ip": "",
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"security_groups.#": "1",
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"security_groups.0": "sg-cccccccc",
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"subnet_id": "subnet-XXXXXXXX",
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"tenancy": "default"
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}
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}
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},
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"aws_instance.two": {
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"type": "aws_instance",
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"depends_on": [
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"aws_security_group.example"
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],
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"primary": {
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"id": "i-bbbbbbbb",
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"attributes": {
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"ami": "ami-XXXXXXXX",
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"availability_zone": "us-east-1b",
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"id": "i-bbbbbbbb",
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"instance_type": "t2.micro",
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"key_name": "",
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"private_dns": "ip-2-2-2-2.ec2.internal",
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"private_ip": "2.2.2.2",
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"public_dns": "",
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"public_ip": "",
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"security_groups.#": "1",
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"security_groups.0": "sg-cccccccc",
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"subnet_id": "subnet-XXXXXXXX",
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"tenancy": "default"
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}
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}
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},
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"aws_route53_record.example": {
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"type": "aws_route53_record",
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"depends_on": [
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"aws_instance.one",
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"aws_instance.two"
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],
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"primary": {
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"id": "XXXXXXXXXXXXXX_something.example.com_CNAME",
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"attributes": {
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"id": "XXXXXXXXXXXXXX_something.example.com_CNAME",
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"name": "something.example.com",
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"records.#": "2",
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"records.0": "i-aaaaaaaa",
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"records.1": "i-bbbbbbbb",
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"ttl": "300",
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"type": "CNAME",
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"zone_id": "XXXXXXXXXXXXXX"
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}
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}
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},
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"aws_security_group.example": {
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"type": "aws_security_group",
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"primary": {
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"id": "sg-cccccccc",
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"attributes": {
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"description": "Allow SSH and HTTP from inside the firewall",
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"id": "sg-cccccccc",
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"ingress.#": "2",
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"ingress.0.cidr_blocks.#": "2",
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"ingress.0.cidr_blocks.0": "10.0.0.0/8",
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"ingress.0.cidr_blocks.1": "192.168.0.0/16",
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"ingress.0.from_port": "22",
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"ingress.0.protocol": "tcp",
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"ingress.0.security_groups.#": "0",
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"ingress.0.self": "false",
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"ingress.0.to_port": "22",
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"ingress.1.cidr_blocks.#": "2",
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"ingress.1.cidr_blocks.0": "10.0.0.0/8",
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"ingress.1.cidr_blocks.1": "192.168.0.0/16",
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"ingress.1.from_port": "80",
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"ingress.1.protocol": "tcp",
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"ingress.1.security_groups.#": "0",
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"ingress.1.self": "false",
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"ingress.1.to_port": "80",
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"name": "example",
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"owner_id": "111111111111",
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"tags.App": "my_app",
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"tags.Environment": "my_env",
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"vpc_id": "vpc-XXXXXXXX"
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}
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}
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}
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}
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}
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]
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}
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60
main.go
Normal file
60
main.go
Normal file
@ -0,0 +1,60 @@
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package main
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import (
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"flag"
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"fmt"
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"os"
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"path/filepath"
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)
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var version = flag.Bool("version", false, "print version information and exit")
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var list = flag.Bool("list", false, "list mode")
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var host = flag.String("host", "", "host mode")
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func main() {
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flag.Parse()
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file := flag.Arg(0)
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if *version == true {
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fmt.Printf("%s version %d\n", os.Args[0], versionInfo())
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return
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}
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if file == "" {
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fmt.Printf("Usage: %s [options] path\n", os.Args[0])
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os.Exit(1)
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}
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if !*list && *host == "" {
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fmt.Println("Either --host or --list must be specified")
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os.Exit(1)
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}
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path, err := filepath.Abs(file)
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if err != nil {
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fmt.Printf("Invalid file: %s\n", err)
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os.Exit(1)
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}
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stateFile, err := os.Open(path)
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defer stateFile.Close()
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if err != nil {
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fmt.Printf("Error opening tfstate file: %s\n", err)
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os.Exit(1)
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}
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var s state
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err = s.read(stateFile)
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if err != nil {
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fmt.Printf("Error reading tfstate file: %s\n", err)
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os.Exit(1)
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}
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if *list {
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os.Exit(cmdList(os.Stdout, os.Stderr, &s))
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} else if *host != "" {
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os.Exit(cmdHost(os.Stdout, os.Stderr, &s, *host))
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}
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}
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61
parser.go
Normal file
61
parser.go
Normal file
@ -0,0 +1,61 @@
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package main
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import (
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"io"
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"io/ioutil"
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"encoding/json"
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"strings"
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)
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type state struct {
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Modules []moduleState `json:"modules"`
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}
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// read populates the state object from a statefile.
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func (s *state) read(stateFile io.Reader) error {
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// read statefile contents
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b, err := ioutil.ReadAll(stateFile)
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if err != nil {
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return err
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}
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// parse into struct
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err = json.Unmarshal(b, s)
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if err != nil {
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return err
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}
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return nil
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}
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// hosts returns a map of name to instanceState, for each of the aws_instance
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// resources found in the statefile.
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func (s *state) instances() map[string]instanceState {
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inst := make(map[string]instanceState)
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for _, m := range s.Modules {
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for k, r := range m.Resources {
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if r.Type == "aws_instance" {
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name := strings.TrimPrefix(k, "aws_instance.")
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inst[name] = r.Primary
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}
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}
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}
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return inst
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}
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type moduleState struct {
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Resources map[string]resourceState `json:"resources"`
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}
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type resourceState struct {
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Type string `json:"type"`
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Primary instanceState `json:"primary"`
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}
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type instanceState struct {
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ID string `json:"id"`
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Attributes map[string]string `json:"attributes,omitempty"`
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}
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116
parser_test.go
Normal file
116
parser_test.go
Normal file
@ -0,0 +1,116 @@
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package main
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import (
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"github.com/stretchr/testify/assert"
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"testing"
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"strings"
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)
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const exampleStateFile = `
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{
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"version": 1,
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"serial": 1,
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"modules": [
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{
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"path": [
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"root"
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],
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"outputs": {},
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"resources": {
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"aws_instance.one": {
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"type": "aws_instance",
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"primary": {
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"id": "i-aaaaaaaa",
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"attributes": {
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"ami": "ami-XXXXXXXX",
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"id": "i-aaaaaaaa"
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}
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}
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},
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"aws_instance.two": {
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"type": "aws_instance",
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"primary": {
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"id": "i-bbbbbbbb",
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"attributes": {
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"ami": "ami-YYYYYYYY",
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"id": "i-bbbbbbbb"
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}
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}
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},
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"aws_security_group.example": {
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"type": "aws_security_group",
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"primary": {
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"id": "sg-cccccccc",
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"attributes": {
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"description": "Whatever",
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"id": "sg-cccccccc"
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}
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}
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}
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}
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}
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]
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}
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`
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func TestStateRead(t *testing.T) {
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r := strings.NewReader(exampleStateFile)
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var s state
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err := s.read(r)
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assert.Nil(t, err)
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exp := state{
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Modules: []moduleState{
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moduleState{
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Resources: map[string]resourceState{
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"aws_instance.one": resourceState{
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Type: "aws_instance",
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Primary: instanceState{
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ID: "i-aaaaaaaa",
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Attributes: map[string]string{
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"ami": "ami-XXXXXXXX",
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"id": "i-aaaaaaaa",
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},
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},
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},
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"aws_instance.two": resourceState{
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Type: "aws_instance",
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Primary: instanceState{
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ID: "i-bbbbbbbb",
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Attributes: map[string]string{
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"ami": "ami-YYYYYYYY",
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"id": "i-bbbbbbbb",
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},
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},
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},
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"aws_security_group.example": resourceState{
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Type: "aws_security_group",
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Primary: instanceState{
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ID: "sg-cccccccc",
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Attributes: map[string]string{
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"description": "Whatever",
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"id": "sg-cccccccc",
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},
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},
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},
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},
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},
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},
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}
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assert.Equal(t, exp, s)
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}
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func TestInstances(t *testing.T) {
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r := strings.NewReader(exampleStateFile)
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var s state
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err := s.read(r)
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assert.Nil(t, err)
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inst := s.instances()
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assert.Equal(t, 2, len(inst))
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assert.Equal(t, "i-aaaaaaaa", inst["one"].ID)
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assert.Equal(t, "i-bbbbbbbb", inst["two"].ID)
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}
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@ -1,139 +0,0 @@
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"github.com/hashicorp/terraform/terraform"
|
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"os"
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"path/filepath"
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)
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var list = flag.Bool("list", false, "list mode")
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var host = flag.String("host", "", "host mode")
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type Host struct {
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Name string `json:"name"`
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IP string `json:"ip"`
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vars HostVars
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}
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type HostVars map[string]interface{}
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type Group struct {
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name string
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hosts []*Host
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}
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func main() {
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flag.Parse()
|
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file := flag.Arg(0)
|
||||
|
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if file == "" {
|
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fmt.Printf("Usage: %s [options] path\n", os.Args[0])
|
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os.Exit(1)
|
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}
|
||||
|
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if !*list && *host == "" {
|
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fmt.Println("Either --host or --list must be specified")
|
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os.Exit(1)
|
||||
}
|
||||
|
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path, err := filepath.Abs(file)
|
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if err != nil {
|
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fmt.Printf("Invalid file: %s\n", err)
|
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os.Exit(1)
|
||||
}
|
||||
|
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f, err := os.Open(path)
|
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if err != nil {
|
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fmt.Printf("Error opening tfstate file: %s\n", err)
|
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os.Exit(1)
|
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}
|
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|
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state, err := terraform.ReadState(f)
|
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if err != nil {
|
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fmt.Printf("Error reading state: %s\n", err)
|
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os.Exit(1)
|
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}
|
||||
|
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if *list {
|
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hosts := mustGetList(state)
|
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os.Stdout.Write(mustMarshal(hosts))
|
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|
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} else if *host != "" {
|
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host := mustGetHost(state, *host)
|
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os.Stdout.Write(mustMarshal(host.vars))
|
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}
|
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}
|
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|
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func mustGetList(state *terraform.State) interface{} {
|
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hosts, err := getList(state)
|
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|
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if err != nil {
|
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fmt.Printf("Error getting host list: %s\n", err)
|
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os.Exit(1)
|
||||
}
|
||||
|
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return hosts
|
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}
|
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|
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func mustGetHost(state *terraform.State, hostname string) *Host {
|
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host, err := getHost(state, hostname)
|
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|
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if err != nil {
|
||||
fmt.Printf("Error getting host variables: %s\n", err)
|
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os.Exit(1)
|
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}
|
||||
|
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return host
|
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}
|
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|
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func mustMarshal(whatever interface{}) []byte {
|
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json, err := json.Marshal(whatever)
|
||||
|
||||
if err != nil {
|
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fmt.Printf("Error encoding JSON: %s\n", err)
|
||||
os.Exit(1)
|
||||
}
|
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|
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return json
|
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}
|
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|
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func getList(state *terraform.State) (interface{}, error) {
|
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hostnames := make([]string, 0)
|
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for _, h := range readHosts(state) {
|
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hostnames = append(hostnames, h.IP)
|
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}
|
||||
|
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groups := map[string][]string{"production": hostnames}
|
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return groups, nil
|
||||
}
|
||||
|
||||
func getHost(state *terraform.State, hostname string) (*Host, error) {
|
||||
for _, h := range readHosts(state) {
|
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if h.IP == hostname {
|
||||
return h, nil
|
||||
}
|
||||
}
|
||||
|
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return nil, fmt.Errorf("No such host: %s", hostname)
|
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}
|
||||
|
||||
func readHosts(state *terraform.State) []*Host {
|
||||
hosts := make([]*Host, 0)
|
||||
|
||||
for _, resource := range state.Resources {
|
||||
if resource.Type == "aws_instance" {
|
||||
host := &Host{
|
||||
Name: resource.Attributes["id"],
|
||||
IP: resource.Attributes["public_ip"],
|
||||
vars: HostVars{},
|
||||
}
|
||||
|
||||
hosts = append(hosts, host)
|
||||
}
|
||||
}
|
||||
|
||||
return hosts
|
||||
}
|
||||
15
version.go
Normal file
15
version.go
Normal file
@ -0,0 +1,15 @@
|
||||
package main
|
||||
|
||||
// Deliberately uninitialized. See below.
|
||||
var build_version string
|
||||
|
||||
// versionInfo returns a string containing the version information of the
|
||||
// current build. It's empty by default, but can be included as part of the
|
||||
// build process by setting the main.build_version variable.
|
||||
func versionInfo() string {
|
||||
if build_version != "" {
|
||||
return build_version
|
||||
} else {
|
||||
return "unknown"
|
||||
}
|
||||
}
|
||||
13
version_test.go
Normal file
13
version_test.go
Normal file
@ -0,0 +1,13 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/stretchr/testify/assert"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestVersionInfo(t *testing.T) {
|
||||
assert.Equal(t, "unknown", versionInfo())
|
||||
|
||||
build_version = "vXYZ"
|
||||
assert.Equal(t, "vXYZ", versionInfo())
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user