120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
package initialize
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import (
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"os"
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"path"
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"regexp"
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"strings"
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"github.com/coreos/coreos-cloudinit/system"
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)
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const DefaultSSHKeyName = "coreos-cloudinit"
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type Environment struct {
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root string
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configRoot string
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workspace string
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netconfType string
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sshKeyName string
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substitutions map[string]string
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}
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// TODO(jonboulle): this is getting unwieldy, should be able to simplify the interface somehow
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func NewEnvironment(root, configRoot, workspace, netconfType, sshKeyName string, substitutions map[string]string) *Environment {
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if substitutions == nil {
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substitutions = make(map[string]string)
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}
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// If certain values are not in the supplied substitution, fall back to retrieving them from the environment
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for k, v := range map[string]string{
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"$public_ipv4": os.Getenv("COREOS_PUBLIC_IPV4"),
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"$private_ipv4": os.Getenv("COREOS_PRIVATE_IPV4"),
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"$public_ipv6": os.Getenv("COREOS_PUBLIC_IPV6"),
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"$private_ipv6": os.Getenv("COREOS_PRIVATE_IPV6"),
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} {
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if _, ok := substitutions[k]; !ok {
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substitutions[k] = v
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}
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}
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return &Environment{root, configRoot, workspace, netconfType, sshKeyName, substitutions}
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}
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func (e *Environment) Workspace() string {
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return path.Join(e.root, e.workspace)
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}
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func (e *Environment) Root() string {
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return e.root
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}
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func (e *Environment) ConfigRoot() string {
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return e.configRoot
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}
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func (e *Environment) NetconfType() string {
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return e.netconfType
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}
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func (e *Environment) SSHKeyName() string {
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return e.sshKeyName
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}
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func (e *Environment) SetSSHKeyName(name string) {
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e.sshKeyName = name
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}
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// Apply goes through the map of substitutions and replaces all instances of
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// the keys with their respective values. It supports escaping substitutions
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// with a leading '\'.
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func (e *Environment) Apply(data string) string {
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for key, val := range e.substitutions {
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matchKey := strings.Replace(key, `$`, `\$`, -1)
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replKey := strings.Replace(key, `$`, `$$`, -1)
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// "key" -> "val"
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data = regexp.MustCompile(`([^\\]|^)`+matchKey).ReplaceAllString(data, `${1}`+val)
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// "\key" -> "key"
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data = regexp.MustCompile(`\\`+matchKey).ReplaceAllString(data, replKey)
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}
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return data
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}
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func (e *Environment) DefaultEnvironmentFile() *system.EnvFile {
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ef := system.EnvFile{
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File: &system.File{
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Path: "/etc/environment",
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},
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Vars: map[string]string{},
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}
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if ip, ok := e.substitutions["$public_ipv4"]; ok && len(ip) > 0 {
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ef.Vars["COREOS_PUBLIC_IPV4"] = ip
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}
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if ip, ok := e.substitutions["$private_ipv4"]; ok && len(ip) > 0 {
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ef.Vars["COREOS_PRIVATE_IPV4"] = ip
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}
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if ip, ok := e.substitutions["$public_ipv6"]; ok && len(ip) > 0 {
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ef.Vars["COREOS_PUBLIC_IPV6"] = ip
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}
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if ip, ok := e.substitutions["$private_ipv6"]; ok && len(ip) > 0 {
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ef.Vars["COREOS_PRIVATE_IPV6"] = ip
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}
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if len(ef.Vars) == 0 {
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return nil
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} else {
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return &ef
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}
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}
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// normalizeSvcEnv standardizes the keys of the map (environment variables for a service)
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// by replacing any dashes with underscores and ensuring they are entirely upper case.
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// For example, "some-env" --> "SOME_ENV"
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func normalizeSvcEnv(m map[string]string) map[string]string {
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out := make(map[string]string, len(m))
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for key, val := range m {
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key = strings.ToUpper(key)
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key = strings.Replace(key, "-", "_", -1)
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out[key] = val
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}
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return out
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}
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