73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
package initialize
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import (
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"encoding/json"
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"sort"
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)
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// ParseMetaData parses a JSON blob in the OpenStack metadata service format,
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// and converts it to a partially hydrated CloudConfig.
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func ParseMetaData(contents string) (*CloudConfig, error) {
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if len(contents) == 0 {
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return nil, nil
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}
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var metadata struct {
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SSHAuthorizedKeyMap map[string]string `json:"public_keys"`
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Hostname string `json:"hostname"`
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NetworkConfig struct {
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ContentPath string `json:"content_path"`
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} `json:"network_config"`
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}
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if err := json.Unmarshal([]byte(contents), &metadata); err != nil {
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return nil, err
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}
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var cfg CloudConfig
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if len(metadata.SSHAuthorizedKeyMap) > 0 {
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cfg.SSHAuthorizedKeys = make([]string, 0, len(metadata.SSHAuthorizedKeyMap))
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for _, name := range sortedKeys(metadata.SSHAuthorizedKeyMap) {
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cfg.SSHAuthorizedKeys = append(cfg.SSHAuthorizedKeys, metadata.SSHAuthorizedKeyMap[name])
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}
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}
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cfg.Hostname = metadata.Hostname
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cfg.NetworkConfigPath = metadata.NetworkConfig.ContentPath
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return &cfg, nil
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}
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// ExtractIPsFromMetaData parses a JSON blob in the OpenStack metadata service
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// format and returns a substitution map possibly containing private_ipv4,
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// public_ipv4, private_ipv6, and public_ipv6 addresses.
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func ExtractIPsFromMetadata(contents []byte) (map[string]string, error) {
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var ips struct {
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PublicIPv4 string `json:"public-ipv4"`
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PrivateIPv4 string `json:"local-ipv4"`
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PublicIPv6 string `json:"public-ipv6"`
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PrivateIPv6 string `json:"local-ipv6"`
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}
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if err := json.Unmarshal(contents, &ips); err != nil {
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return nil, err
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}
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m := make(map[string]string)
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if ips.PrivateIPv4 != "" {
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m["$private_ipv4"] = ips.PrivateIPv4
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}
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if ips.PublicIPv4 != "" {
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m["$public_ipv4"] = ips.PublicIPv4
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}
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if ips.PrivateIPv6 != "" {
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m["$private_ipv6"] = ips.PrivateIPv6
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}
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if ips.PublicIPv6 != "" {
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m["$public_ipv6"] = ips.PublicIPv6
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}
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return m, nil
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}
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func sortedKeys(m map[string]string) (keys []string) {
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for key := range m {
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keys = append(keys, key)
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}
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sort.Strings(keys)
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return
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}
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