// EnsureDocker attempts to connect to the Docker daemon defined by the helper,
// and if it is unable to it will print a warning.
func (c *NodeConfig) EnsureDocker(docker *dockerutil.Helper) {
dockerClient, dockerAddr := docker.GetClientOrExit()
if err := dockerClient.Ping(); err != nil {
c.HandleDockerError(fmt.Sprintf("Docker could not be reached at %s. Docker must be installed and running to start containers.\n%v", dockerAddr, err))
return
}
glog.Infof("Connecting to Docker at %s", dockerAddr)
env, err := dockerClient.Version()
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to check for Docker server version.\n%v", err))
return
}
serverVersionString := env.Get("ApiVersion")
serverVersion, err := dockerclient.NewAPIVersion(serverVersionString)
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to determine Docker server version from %q.\n%v", serverVersionString, err))
return
}
minimumPullByIDVersion, err := dockerclient.NewAPIVersion(minimumDockerAPIVersionWithPullByID)
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to check for Docker server version.\n%v", err))
return
}
if serverVersion.LessThan(minimumPullByIDVersion) {
c.HandleDockerError(fmt.Sprintf("Docker 1.6 or later (server API version 1.18 or later) required."))
return
}
c.DockerClient = dockerClient
}
func checkDockerVersion() error {
startCheck("Docker up to date")
dockerVersionTest, err := docker.NewClientFromEnv()
if err != nil {
return err
}
minDockerVersion, err := docker.NewAPIVersion("1.9")
e, err := dockerVersionTest.Version()
if err != nil {
return err
}
currentVersionParts := strings.Split(e.Get("Version"), ".")
currentVersion, err := docker.NewAPIVersion(fmt.Sprintf("%s.%s", currentVersionParts[0], currentVersionParts[1]))
if err != nil {
return err
}
if !(currentVersion.GreaterThanOrEqualTo(minDockerVersion)) {
diagnose(Diagnosis{
Title: "Docker up to date",
Description: "<fail>Docker engine is out of date (min: 1.9)</fail>",
DocsLink: "https://docs.docker.com/engine/installation/",
Kind: "fail",
})
} else {
diagnose(Diagnosis{
Title: "Docker up to date",
Kind: "success",
})
}
return nil
}
// EnsureDocker attempts to connect to the Docker daemon defined by the helper,
// and if it is unable to it will print a warning.
func (c *NodeConfig) EnsureDocker(docker *dockerutil.Helper) {
dockerClient, dockerAddr, err := docker.GetClient()
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to create a Docker client for %s - Docker must be installed and running to start containers.\n%v", dockerAddr, err))
return
}
if url, err := url.Parse(dockerAddr); err == nil && url.Scheme == "unix" && len(url.Path) > 0 {
s, err := os.Stat(url.Path)
switch {
case os.IsNotExist(err):
c.HandleDockerError(fmt.Sprintf("No Docker socket found at %s. Have you started the Docker daemon?", url.Path))
return
case os.IsPermission(err):
c.HandleDockerError(fmt.Sprintf("You do not have permission to connect to the Docker daemon (via %s). This process requires running as the root user.", url.Path))
return
case err == nil && s.IsDir():
c.HandleDockerError(fmt.Sprintf("The Docker socket at %s is a directory instead of a unix socket - check that you have configured your connection to the Docker daemon properly.", url.Path))
return
}
}
if err := dockerClient.Ping(); err != nil {
c.HandleDockerError(fmt.Sprintf("Docker could not be reached at %s. Docker must be installed and running to start containers.\n%v", dockerAddr, err))
return
}
glog.Infof("Connecting to Docker at %s", dockerAddr)
env, err := dockerClient.Version()
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to check for Docker server version.\n%v", err))
return
}
serverVersionString := env.Get("ApiVersion")
serverVersion, err := dockerclient.NewAPIVersion(serverVersionString)
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to determine Docker server version from %q.\n%v", serverVersionString, err))
return
}
minimumPullByIDVersion, err := dockerclient.NewAPIVersion(minimumDockerAPIVersionWithPullByID)
if err != nil {
c.HandleDockerError(fmt.Sprintf("Unable to check for Docker server version.\n%v", err))
return
}
if serverVersion.LessThan(minimumPullByIDVersion) {
c.HandleDockerError(fmt.Sprintf("Docker 1.6 or later (server API version 1.18 or later) required."))
return
}
c.DockerClient = dockerClient
}
func TestVersion(t *testing.T) {
fakeDocker := &FakeDockerClient{VersionInfo: docker.Env{"Version=1.1.3", "ApiVersion=1.15"}}
manager := &DockerManager{client: fakeDocker}
version, err := manager.Version()
if err != nil {
t.Errorf("got error while getting docker server version - %s", err)
}
expectedVersion, _ := docker.NewAPIVersion("1.15")
if e, a := expectedVersion.String(), version.String(); e != a {
t.Errorf("invalid docker server version. expected: %v, got: %v", e, a)
}
}