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dex/vendor/sigs.k8s.io/testing_frameworks/integration/etcd.go

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2020-01-31 15:02:00 +05:30
package integration
import (
"io"
"time"
"net/url"
"sigs.k8s.io/testing_frameworks/integration/internal"
)
// Etcd knows how to run an etcd server.
type Etcd struct {
// URL is the address the Etcd should listen on for client connections.
//
// If this is not specified, we default to a random free port on localhost.
URL *url.URL
// Path is the path to the etcd binary.
//
// If this is left as the empty string, we will attempt to locate a binary,
// by checking for the TEST_ASSET_ETCD environment variable, and the default
// test assets directory. See the "Binaries" section above (in doc.go) for
// details.
Path string
// Args is a list of arguments which will passed to the Etcd binary. Before
// they are passed on, the`y will be evaluated as go-template strings. This
// means you can use fields which are defined and exported on this Etcd
// struct (e.g. "--data-dir={{ .Dir }}").
// Those templates will be evaluated after the defaulting of the Etcd's
// fields has already happened and just before the binary actually gets
// started. Thus you have access to caluclated fields like `URL` and others.
//
// If not specified, the minimal set of arguments to run the Etcd will be
// used.
Args []string
// DataDir is a path to a directory in which etcd can store its state.
//
// If left unspecified, then the Start() method will create a fresh temporary
// directory, and the Stop() method will clean it up.
DataDir string
// StartTimeout, StopTimeout specify the time the Etcd is allowed to
// take when starting and stopping before an error is emitted.
//
// If not specified, these default to 20 seconds.
StartTimeout time.Duration
StopTimeout time.Duration
// Out, Err specify where Etcd should write its StdOut, StdErr to.
//
// If not specified, the output will be discarded.
Out io.Writer
Err io.Writer
processState *internal.ProcessState
}
// Start starts the etcd, waits for it to come up, and returns an error, if one
// occoured.
func (e *Etcd) Start() error {
if e.processState == nil {
if err := e.setProcessState(); err != nil {
return err
}
}
return e.processState.Start(e.Out, e.Err)
}
func (e *Etcd) setProcessState() error {
var err error
e.processState = &internal.ProcessState{}
e.processState.DefaultedProcessInput, err = internal.DoDefaulting(
"etcd",
e.URL,
e.DataDir,
e.Path,
e.StartTimeout,
e.StopTimeout,
)
if err != nil {
return err
}
e.processState.StartMessage = internal.GetEtcdStartMessage(e.processState.URL)
e.URL = &e.processState.URL
e.DataDir = e.processState.Dir
e.Path = e.processState.Path
e.StartTimeout = e.processState.StartTimeout
e.StopTimeout = e.processState.StopTimeout
e.processState.Args, err = internal.RenderTemplates(
internal.DoEtcdArgDefaulting(e.Args), e,
)
return err
}
// Stop stops this process gracefully, waits for its termination, and cleans up
// the DataDir if necessary.
func (e *Etcd) Stop() error {
return e.processState.Stop()
}
// EtcdDefaultArgs exposes the default args for Etcd so that you
// can use those to append your own additional arguments.
//
// The internal default arguments are explicitely copied here, we don't want to
// allow users to change the internal ones.
var EtcdDefaultArgs = append([]string{}, internal.EtcdDefaultArgs...)