refactor(*): Break apart packages

initialize/etcd.go

@@ -0,0 +1,46 @@
+package initialize
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"strings"
+
+	"github.com/coreos/coreos-cloudinit/system"
+)
+
+type EtcdEnvironment map[string]string
+
+func (ec EtcdEnvironment) String() (out string) {
+	public := os.Getenv("COREOS_PUBLIC_IPV4")
+	private := os.Getenv("COREOS_PRIVATE_IPV4")
+
+	out += "[Service]\n"
+
+	for key, val := range ec {
+		key = strings.ToUpper(key)
+		key = strings.Replace(key, "-", "_", -1)
+
+		if public != "" {
+			val = strings.Replace(val, "$public_ipv4", public, -1)
+		}
+
+		if private != "" {
+			val = strings.Replace(val, "$private_ipv4", private, -1)
+		}
+
+		out += fmt.Sprintf("Environment=\"ETCD_%s=%s\"\n", key, val)
+	}
+	return
+}
+
+// Write an EtcdEnvironment to the appropriate path on disk for etcd.service
+func WriteEtcdEnvironment(env EtcdEnvironment, root string) error {
+	file := system.File{
+		Path: path.Join(root, "etc", "systemd", "system", "etcd.service.d", "20-cloudinit.conf"),
+		RawFilePermissions: "0644",
+		Content: env.String(),
+	}
+
+	return system.WriteFile(&file)
+}