unistack-org/cloudinit
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etcd: refactor config

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- Explicitly specify all of the valid options for etcd
- Remove the default name generation (ETCD_NAME is set by its unit file now)
- Seperate the etcd config from Units()
- Remove support for DISCOVERY_URL
- Add YAML tags for the fields
This commit is contained in:
Alex Crawford
2014-09-21 19:37:39 -07:00
parent da5f85b3fb
commit c255739a93
8 changed files with 147 additions and 250 deletions
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5
initialize/config.go
View File

@@ -8,6 +8,7 @@ import (
"github.com/coreos/coreos-cloudinit/third_party/gopkg.in/yaml.v1"
"github.com/coreos/coreos-cloudinit/config"
"github.com/coreos/coreos-cloudinit/network"
"github.com/coreos/coreos-cloudinit/system"
)
@@ -30,7 +31,7 @@ type CloudConfigUnit interface {
type CloudConfig struct {
SSHAuthorizedKeys []string `yaml:"ssh_authorized_keys"`
Coreos struct {
Etcd EtcdEnvironment
Etcd config.Etcd
Fleet FleetEnvironment
OEM OEMRelease
Update UpdateConfig
@@ -226,7 +227,7 @@ func Apply(cfg CloudConfig, env *Environment) error {
}
}
for _, ccu := range []CloudConfigUnit{cfg.Coreos.Etcd, cfg.Coreos.Fleet, cfg.Coreos.Update} {
for _, ccu := range []CloudConfigUnit{system.Etcd{cfg.Coreos.Etcd}, cfg.Coreos.Fleet, cfg.Coreos.Update} {
u, err := ccu.Units(env.Root())
if err != nil {
return err

2
initialize/config_test.go
View File

@@ -66,7 +66,7 @@ hostname:
if cfg.Hostname != "foo" {
t.Fatalf("hostname not correctly set when invalid keys are present")
}
if len(cfg.Coreos.Etcd) < 1 {
if cfg.Coreos.Etcd.Discovery != "https://discovery.etcd.io/827c73219eeb2fa5530027c37bf18877" {
t.Fatalf("etcd section not correctly set when invalid keys are present")
}
if len(cfg.WriteFiles) < 1 || cfg.WriteFiles[0].Content != "fun" || cfg.WriteFiles[0].Path != "/var/party" {

63
initialize/etcd.go
View File

@@ -1,63 +0,0 @@
package initialize
import (
"errors"
"fmt"
"sort"
"github.com/coreos/coreos-cloudinit/system"
)
type EtcdEnvironment map[string]string
func (ee EtcdEnvironment) String() (out string) {
norm := normalizeSvcEnv(ee)
if val, ok := norm["DISCOVERY_URL"]; ok {
delete(norm, "DISCOVERY_URL")
if _, ok := norm["DISCOVERY"]; !ok {
norm["DISCOVERY"] = val
}
}
var sorted sort.StringSlice
for k, _ := range norm {
sorted = append(sorted, k)
}
sorted.Sort()
out += "[Service]\n"
for _, key := range sorted {
val := norm[key]
out += fmt.Sprintf("Environment=\"ETCD_%s=%s\"\n", key, val)
}
return
}
// Units creates a Unit file drop-in for etcd, using any configured
// options and adding a default MachineID if unset.
func (ee EtcdEnvironment) Units(root string) ([]system.Unit, error) {
if len(ee) < 1 {
return nil, nil
}
if _, ok := ee["name"]; !ok {
if machineID := system.MachineID(root); machineID != "" {
ee["name"] = machineID
} else if hostname, err := system.Hostname(); err == nil {
ee["name"] = hostname
} else {
return nil, errors.New("Unable to determine default etcd name")
}
}
etcd := system.Unit{
Name: "etcd.service",
Runtime: true,
DropIn: true,
Content: ee.String(),
}
return []system.Unit{etcd}, nil
}

184
initialize/etcd_test.go
View File

@@ -1,184 +0,0 @@
package initialize
import (
"io/ioutil"
"os"
"path"
"testing"
"github.com/coreos/coreos-cloudinit/system"
)
func TestEtcdEnvironment(t *testing.T) {
cfg := make(EtcdEnvironment, 0)
cfg["discovery"] = "http://disco.example.com/foobar"
cfg["peer-bind-addr"] = "127.0.0.1:7002"
env := cfg.String()
expect := `[Service]
Environment="ETCD_DISCOVERY=http://disco.example.com/foobar"
Environment="ETCD_PEER_BIND_ADDR=127.0.0.1:7002"
`
if env != expect {
t.Errorf("Generated environment:\n%s\nExpected environment:\n%s", env, expect)
}
}
func TestEtcdEnvironmentDiscoveryURLTranslated(t *testing.T) {
cfg := make(EtcdEnvironment, 0)
cfg["discovery_url"] = "http://disco.example.com/foobar"
cfg["peer-bind-addr"] = "127.0.0.1:7002"
env := cfg.String()
expect := `[Service]
Environment="ETCD_DISCOVERY=http://disco.example.com/foobar"
Environment="ETCD_PEER_BIND_ADDR=127.0.0.1:7002"
`
if env != expect {
t.Errorf("Generated environment:\n%s\nExpected environment:\n%s", env, expect)
}
}
func TestEtcdEnvironmentDiscoveryOverridesDiscoveryURL(t *testing.T) {
cfg := make(EtcdEnvironment, 0)
cfg["discovery_url"] = "ping"
cfg["discovery"] = "pong"
cfg["peer-bind-addr"] = "127.0.0.1:7002"
env := cfg.String()
expect := `[Service]
Environment="ETCD_DISCOVERY=pong"
Environment="ETCD_PEER_BIND_ADDR=127.0.0.1:7002"
`
if env != expect {
t.Errorf("Generated environment:\n%s\nExpected environment:\n%s", env, expect)
}
}
func TestEtcdEnvironmentWrittenToDisk(t *testing.T) {
ee := EtcdEnvironment{
"name": "node001",
"discovery": "http://disco.example.com/foobar",
"peer-bind-addr": "127.0.0.1:7002",
}
dir, err := ioutil.TempDir(os.TempDir(), "coreos-cloudinit-")
if err != nil {
t.Fatalf("Unable to create tempdir: %v", err)
}
defer os.RemoveAll(dir)
sd := system.NewUnitManager(dir)
uu, err := ee.Units(dir)
if err != nil {
t.Fatalf("Generating etcd unit failed: %v", err)
}
if len(uu) != 1 {
t.Fatalf("Expected 1 unit to be returned, got %d", len(uu))
}
u := uu[0]
dst := u.Destination(dir)
os.Stderr.WriteString("writing to " + dir + "\n")
if err := sd.PlaceUnit(&u, dst); err != nil {
t.Fatalf("Writing of EtcdEnvironment failed: %v", err)
}
fullPath := path.Join(dir, "run", "systemd", "system", "etcd.service.d", "20-cloudinit.conf")
fi, err := os.Stat(fullPath)
if err != nil {
t.Fatalf("Unable to stat file: %v", err)
}
if fi.Mode() != os.FileMode(0644) {
t.Errorf("File has incorrect mode: %v", fi.Mode())
}
contents, err := ioutil.ReadFile(fullPath)
if err != nil {
t.Fatalf("Unable to read expected file: %v", err)
}
expect := `[Service]
Environment="ETCD_DISCOVERY=http://disco.example.com/foobar"
Environment="ETCD_NAME=node001"
Environment="ETCD_PEER_BIND_ADDR=127.0.0.1:7002"
`
if string(contents) != expect {
t.Fatalf("File has incorrect contents")
}
}
func TestEtcdEnvironmentEmptyNoOp(t *testing.T) {
ee := EtcdEnvironment{}
uu, err := ee.Units("")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if len(uu) > 0 {
t.Fatalf("Generated etcd units unexpectedly: %v")
}
}
func TestEtcdEnvironmentWrittenToDiskDefaultToMachineID(t *testing.T) {
ee := EtcdEnvironment{"foo": "bar"}
dir, err := ioutil.TempDir(os.TempDir(), "coreos-cloudinit-")
if err != nil {
t.Fatalf("Unable to create tempdir: %v", err)
}
defer os.RemoveAll(dir)
sd := system.NewUnitManager(dir)
os.Mkdir(path.Join(dir, "etc"), os.FileMode(0755))
err = ioutil.WriteFile(path.Join(dir, "etc", "machine-id"), []byte("node007"), os.FileMode(0444))
if err != nil {
t.Fatalf("Failed writing out /etc/machine-id: %v", err)
}
uu, err := ee.Units(dir)
if err != nil {
t.Fatalf("Generating etcd unit failed: %v", err)
}
if len(uu) == 0 {
t.Fatalf("Returned empty etcd units unexpectedly")
}
u := uu[0]
dst := u.Destination(dir)
os.Stderr.WriteString("writing to " + dir + "\n")
if err := sd.PlaceUnit(&u, dst); err != nil {
t.Fatalf("Writing of EtcdEnvironment failed: %v", err)
}
fullPath := path.Join(dir, "run", "systemd", "system", "etcd.service.d", "20-cloudinit.conf")
contents, err := ioutil.ReadFile(fullPath)
if err != nil {
t.Fatalf("Unable to read expected file: %v", err)
}
expect := `[Service]
Environment="ETCD_FOO=bar"
Environment="ETCD_NAME=node007"
`
if string(contents) != expect {
t.Fatalf("File has incorrect contents")
}
}
func TestEtcdEnvironmentWhenNil(t *testing.T) {
// EtcdEnvironment will be a nil map if it wasn't in the yaml
var ee EtcdEnvironment
if ee != nil {
t.Fatalf("EtcdEnvironment is not nil")
}
uu, err := ee.Units("")
if len(uu) != 0 || err != nil {
t.Fatalf("Units returned value for nil input")
}
}