802 lines
17 KiB
Go
802 lines
17 KiB
Go
package agent
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"time"
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"github.com/hashicorp/go-multierror"
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"github.com/hashicorp/hcl"
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"github.com/hashicorp/hcl/hcl/ast"
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"github.com/hashicorp/nomad/nomad/structs/config"
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"github.com/mitchellh/mapstructure"
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)
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// ParseConfigFile parses the given path as a config file.
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func ParseConfigFile(path string) (*Config, error) {
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path, err := filepath.Abs(path)
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if err != nil {
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return nil, err
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}
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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config, err := ParseConfig(f)
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if err != nil {
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return nil, err
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}
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return config, nil
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}
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// ParseConfig parses the config from the given io.Reader.
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//
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// Due to current internal limitations, the entire contents of the
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// io.Reader will be copied into memory first before parsing.
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func ParseConfig(r io.Reader) (*Config, error) {
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// Copy the reader into an in-memory buffer first since HCL requires it.
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var buf bytes.Buffer
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if _, err := io.Copy(&buf, r); err != nil {
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return nil, err
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}
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// Parse the buffer
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root, err := hcl.Parse(buf.String())
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if err != nil {
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return nil, fmt.Errorf("error parsing: %s", err)
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}
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buf.Reset()
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// Top-level item should be a list
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list, ok := root.Node.(*ast.ObjectList)
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if !ok {
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return nil, fmt.Errorf("error parsing: root should be an object")
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}
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var config Config
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if err := parseConfig(&config, list); err != nil {
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return nil, fmt.Errorf("error parsing 'config': %v", err)
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}
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return &config, nil
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}
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func parseConfig(result *Config, list *ast.ObjectList) error {
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// Check for invalid keys
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valid := []string{
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"region",
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"datacenter",
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"name",
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"data_dir",
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"log_level",
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"bind_addr",
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"enable_debug",
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"ports",
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"addresses",
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"interfaces",
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"advertise",
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"client",
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"server",
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"telemetry",
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"leave_on_interrupt",
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"leave_on_terminate",
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"enable_syslog",
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"syslog_facility",
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"disable_update_check",
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"disable_anonymous_signature",
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"atlas",
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"consul",
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"vault",
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"tls",
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"http_api_response_headers",
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}
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if err := checkHCLKeys(list, valid); err != nil {
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return multierror.Prefix(err, "config:")
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}
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// Decode the full thing into a map[string]interface for ease
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, list); err != nil {
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return err
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}
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delete(m, "ports")
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delete(m, "addresses")
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delete(m, "interfaces")
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delete(m, "advertise")
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delete(m, "client")
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delete(m, "server")
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delete(m, "telemetry")
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delete(m, "atlas")
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delete(m, "consul")
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delete(m, "vault")
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delete(m, "tls")
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delete(m, "http_api_response_headers")
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// Decode the rest
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if err := mapstructure.WeakDecode(m, result); err != nil {
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return err
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}
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// Parse ports
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if o := list.Filter("ports"); len(o.Items) > 0 {
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if err := parsePorts(&result.Ports, o); err != nil {
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return multierror.Prefix(err, "ports ->")
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}
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}
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// Parse addresses
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if o := list.Filter("addresses"); len(o.Items) > 0 {
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if err := parseAddresses(&result.Addresses, o); err != nil {
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return multierror.Prefix(err, "addresses ->")
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}
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}
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// Parse advertise
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if o := list.Filter("advertise"); len(o.Items) > 0 {
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if err := parseAdvertise(&result.AdvertiseAddrs, o); err != nil {
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return multierror.Prefix(err, "advertise ->")
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}
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}
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// Parse client config
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if o := list.Filter("client"); len(o.Items) > 0 {
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if err := parseClient(&result.Client, o); err != nil {
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return multierror.Prefix(err, "client ->")
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}
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}
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// Parse server config
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if o := list.Filter("server"); len(o.Items) > 0 {
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if err := parseServer(&result.Server, o); err != nil {
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return multierror.Prefix(err, "server ->")
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}
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}
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// Parse telemetry config
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if o := list.Filter("telemetry"); len(o.Items) > 0 {
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if err := parseTelemetry(&result.Telemetry, o); err != nil {
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return multierror.Prefix(err, "telemetry ->")
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}
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}
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// Parse atlas config
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if o := list.Filter("atlas"); len(o.Items) > 0 {
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if err := parseAtlas(&result.Atlas, o); err != nil {
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return multierror.Prefix(err, "atlas ->")
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}
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}
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// Parse the consul config
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if o := list.Filter("consul"); len(o.Items) > 0 {
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if err := parseConsulConfig(&result.Consul, o); err != nil {
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return multierror.Prefix(err, "consul ->")
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}
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}
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// Parse the vault config
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if o := list.Filter("vault"); len(o.Items) > 0 {
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if err := parseVaultConfig(&result.Vault, o); err != nil {
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return multierror.Prefix(err, "vault ->")
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}
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}
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// Parse the TLS config
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if o := list.Filter("tls"); len(o.Items) > 0 {
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if err := parseTLSConfig(&result.TLSConfig, o); err != nil {
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return multierror.Prefix(err, "tls ->")
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}
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}
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// Parse out http_api_response_headers fields. These are in HCL as a list so
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// we need to iterate over them and merge them.
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if headersO := list.Filter("http_api_response_headers"); len(headersO.Items) > 0 {
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for _, o := range headersO.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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if err := mapstructure.WeakDecode(m, &result.HTTPAPIResponseHeaders); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func parsePorts(result **Ports, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'ports' block allowed")
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}
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// Get our ports object
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listVal := list.Items[0].Val
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// Check for invalid keys
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valid := []string{
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"http",
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"rpc",
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"serf",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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var ports Ports
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if err := mapstructure.WeakDecode(m, &ports); err != nil {
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return err
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}
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*result = &ports
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return nil
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}
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func parseAddresses(result **Addresses, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'addresses' block allowed")
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}
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// Get our addresses object
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listVal := list.Items[0].Val
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// Check for invalid keys
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valid := []string{
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"http",
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"rpc",
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"serf",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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var addresses Addresses
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if err := mapstructure.WeakDecode(m, &addresses); err != nil {
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return err
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}
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*result = &addresses
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return nil
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}
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func parseAdvertise(result **AdvertiseAddrs, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'advertise' block allowed")
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}
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// Get our advertise object
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listVal := list.Items[0].Val
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// Check for invalid keys
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valid := []string{
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"http",
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"rpc",
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"serf",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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var advertise AdvertiseAddrs
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if err := mapstructure.WeakDecode(m, &advertise); err != nil {
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return err
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}
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*result = &advertise
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return nil
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}
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func parseClient(result **ClientConfig, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'client' block allowed")
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}
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// Get our client object
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obj := list.Items[0]
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// Value should be an object
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var listVal *ast.ObjectList
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if ot, ok := obj.Val.(*ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return fmt.Errorf("client value: should be an object")
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}
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// Check for invalid keys
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valid := []string{
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"enabled",
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"state_dir",
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"alloc_dir",
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"servers",
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"node_class",
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"options",
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"meta",
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"chroot_env",
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"network_interface",
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"network_speed",
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"cpu_total_compute",
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"max_kill_timeout",
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"client_max_port",
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"client_min_port",
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"reserved",
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"stats",
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"gc_interval",
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"gc_disk_usage_threshold",
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"gc_inode_usage_threshold",
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"gc_parallel_destroys",
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"gc_max_allocs",
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"no_host_uuid",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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delete(m, "options")
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delete(m, "meta")
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delete(m, "chroot_env")
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delete(m, "reserved")
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delete(m, "stats")
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var config ClientConfig
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: &config,
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})
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if err != nil {
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return err
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}
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if err := dec.Decode(m); err != nil {
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return err
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}
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// Parse out options fields. These are in HCL as a list so we need to
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// iterate over them and merge them.
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if optionsO := listVal.Filter("options"); len(optionsO.Items) > 0 {
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for _, o := range optionsO.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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if err := mapstructure.WeakDecode(m, &config.Options); err != nil {
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return err
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}
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}
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}
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// Parse out options meta. These are in HCL as a list so we need to
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// iterate over them and merge them.
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if metaO := listVal.Filter("meta"); len(metaO.Items) > 0 {
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for _, o := range metaO.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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if err := mapstructure.WeakDecode(m, &config.Meta); err != nil {
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return err
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}
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}
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}
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// Parse out chroot_env fields. These are in HCL as a list so we need to
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// iterate over them and merge them.
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if chrootEnvO := listVal.Filter("chroot_env"); len(chrootEnvO.Items) > 0 {
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for _, o := range chrootEnvO.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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if err := mapstructure.WeakDecode(m, &config.ChrootEnv); err != nil {
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return err
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}
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}
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}
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// Parse reserved config
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if o := listVal.Filter("reserved"); len(o.Items) > 0 {
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if err := parseReserved(&config.Reserved, o); err != nil {
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return multierror.Prefix(err, "reserved ->")
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}
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}
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*result = &config
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return nil
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}
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func parseReserved(result **Resources, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'reserved' block allowed")
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}
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// Get our reserved object
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obj := list.Items[0]
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// Value should be an object
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var listVal *ast.ObjectList
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if ot, ok := obj.Val.(*ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return fmt.Errorf("client value: should be an object")
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}
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// Check for invalid keys
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valid := []string{
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"cpu",
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"memory",
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"disk",
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"iops",
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"reserved_ports",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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var reserved Resources
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if err := mapstructure.WeakDecode(m, &reserved); err != nil {
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return err
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}
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if err := reserved.ParseReserved(); err != nil {
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return err
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}
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*result = &reserved
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return nil
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}
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func parseServer(result **ServerConfig, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'server' block allowed")
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}
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// Get our server object
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obj := list.Items[0]
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// Value should be an object
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var listVal *ast.ObjectList
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if ot, ok := obj.Val.(*ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return fmt.Errorf("client value: should be an object")
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}
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// Check for invalid keys
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valid := []string{
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"enabled",
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"bootstrap_expect",
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"data_dir",
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"protocol_version",
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"num_schedulers",
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"enabled_schedulers",
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"node_gc_threshold",
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"eval_gc_threshold",
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"job_gc_threshold",
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"deployment_gc_threshold",
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"heartbeat_grace",
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"min_heartbeat_ttl",
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"max_heartbeats_per_second",
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"start_join",
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"retry_join",
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"retry_max",
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"retry_interval",
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"rejoin_after_leave",
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"encrypt",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, listVal); err != nil {
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return err
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}
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var config ServerConfig
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: &config,
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})
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if err != nil {
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return err
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}
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if err := dec.Decode(m); err != nil {
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return err
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}
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*result = &config
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return nil
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}
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func parseTelemetry(result **Telemetry, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'telemetry' block allowed")
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}
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// Get our telemetry object
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listVal := list.Items[0].Val
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// Check for invalid keys
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valid := []string{
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"statsite_address",
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"statsd_address",
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"disable_hostname",
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"use_node_name",
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"collection_interval",
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"publish_allocation_metrics",
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"publish_node_metrics",
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"datadog_address",
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"circonus_api_token",
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"circonus_api_app",
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"circonus_api_url",
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"circonus_submission_interval",
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"circonus_submission_url",
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"circonus_check_id",
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"circonus_check_force_metric_activation",
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"circonus_check_instance_id",
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"circonus_check_search_tag",
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"circonus_check_display_name",
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"circonus_check_tags",
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"circonus_broker_id",
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"circonus_broker_select_tag",
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}
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, listVal); err != nil {
|
|
return err
|
|
}
|
|
|
|
var telemetry Telemetry
|
|
if err := mapstructure.WeakDecode(m, &telemetry); err != nil {
|
|
return err
|
|
}
|
|
if telemetry.CollectionInterval != "" {
|
|
if dur, err := time.ParseDuration(telemetry.CollectionInterval); err != nil {
|
|
return fmt.Errorf("error parsing value of %q: %v", "collection_interval", err)
|
|
} else {
|
|
telemetry.collectionInterval = dur
|
|
}
|
|
}
|
|
*result = &telemetry
|
|
return nil
|
|
}
|
|
|
|
func parseAtlas(result **AtlasConfig, list *ast.ObjectList) error {
|
|
list = list.Elem()
|
|
if len(list.Items) > 1 {
|
|
return fmt.Errorf("only one 'atlas' block allowed")
|
|
}
|
|
|
|
// Get our atlas object
|
|
listVal := list.Items[0].Val
|
|
|
|
// Check for invalid keys
|
|
valid := []string{
|
|
"infrastructure",
|
|
"token",
|
|
"join",
|
|
"endpoint",
|
|
}
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, listVal); err != nil {
|
|
return err
|
|
}
|
|
|
|
var atlas AtlasConfig
|
|
if err := mapstructure.WeakDecode(m, &atlas); err != nil {
|
|
return err
|
|
}
|
|
*result = &atlas
|
|
return nil
|
|
}
|
|
|
|
func parseConsulConfig(result **config.ConsulConfig, list *ast.ObjectList) error {
|
|
list = list.Elem()
|
|
if len(list.Items) > 1 {
|
|
return fmt.Errorf("only one 'consul' block allowed")
|
|
}
|
|
|
|
// Get our Consul object
|
|
listVal := list.Items[0].Val
|
|
|
|
// Check for invalid keys
|
|
valid := []string{
|
|
"address",
|
|
"auth",
|
|
"auto_advertise",
|
|
"ca_file",
|
|
"cert_file",
|
|
"checks_use_advertise",
|
|
"client_auto_join",
|
|
"client_service_name",
|
|
"key_file",
|
|
"server_auto_join",
|
|
"server_service_name",
|
|
"ssl",
|
|
"timeout",
|
|
"token",
|
|
"verify_ssl",
|
|
}
|
|
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, listVal); err != nil {
|
|
return err
|
|
}
|
|
|
|
consulConfig := config.DefaultConsulConfig()
|
|
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
|
|
DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
|
|
WeaklyTypedInput: true,
|
|
Result: &consulConfig,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := dec.Decode(m); err != nil {
|
|
return err
|
|
}
|
|
|
|
*result = consulConfig
|
|
return nil
|
|
}
|
|
|
|
func parseTLSConfig(result **config.TLSConfig, list *ast.ObjectList) error {
|
|
list = list.Elem()
|
|
if len(list.Items) > 1 {
|
|
return fmt.Errorf("only one 'tls' block allowed")
|
|
}
|
|
|
|
// Get the TLS object
|
|
listVal := list.Items[0].Val
|
|
|
|
valid := []string{
|
|
"http",
|
|
"rpc",
|
|
"verify_server_hostname",
|
|
"ca_file",
|
|
"cert_file",
|
|
"key_file",
|
|
"verify_https_client",
|
|
}
|
|
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, listVal); err != nil {
|
|
return err
|
|
}
|
|
|
|
var tlsConfig config.TLSConfig
|
|
if err := mapstructure.WeakDecode(m, &tlsConfig); err != nil {
|
|
return err
|
|
}
|
|
*result = &tlsConfig
|
|
return nil
|
|
}
|
|
|
|
func parseVaultConfig(result **config.VaultConfig, list *ast.ObjectList) error {
|
|
list = list.Elem()
|
|
if len(list.Items) > 1 {
|
|
return fmt.Errorf("only one 'vault' block allowed")
|
|
}
|
|
|
|
// Get our Vault object
|
|
listVal := list.Items[0].Val
|
|
|
|
// Check for invalid keys
|
|
valid := []string{
|
|
"address",
|
|
"allow_unauthenticated",
|
|
"enabled",
|
|
"task_token_ttl",
|
|
"ca_file",
|
|
"ca_path",
|
|
"cert_file",
|
|
"create_from_role",
|
|
"key_file",
|
|
"tls_server_name",
|
|
"tls_skip_verify",
|
|
"token",
|
|
}
|
|
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, listVal); err != nil {
|
|
return err
|
|
}
|
|
|
|
vaultConfig := config.DefaultVaultConfig()
|
|
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
|
|
DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
|
|
WeaklyTypedInput: true,
|
|
Result: &vaultConfig,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := dec.Decode(m); err != nil {
|
|
return err
|
|
}
|
|
|
|
*result = vaultConfig
|
|
return nil
|
|
}
|
|
|
|
func checkHCLKeys(node ast.Node, valid []string) error {
|
|
var list *ast.ObjectList
|
|
switch n := node.(type) {
|
|
case *ast.ObjectList:
|
|
list = n
|
|
case *ast.ObjectType:
|
|
list = n.List
|
|
default:
|
|
return fmt.Errorf("cannot check HCL keys of type %T", n)
|
|
}
|
|
|
|
validMap := make(map[string]struct{}, len(valid))
|
|
for _, v := range valid {
|
|
validMap[v] = struct{}{}
|
|
}
|
|
|
|
var result error
|
|
for _, item := range list.Items {
|
|
key := item.Keys[0].Token.Value().(string)
|
|
if _, ok := validMap[key]; !ok {
|
|
result = multierror.Append(result, fmt.Errorf(
|
|
"invalid key: %s", key))
|
|
}
|
|
}
|
|
|
|
return result
|
|
}
|