Add version check.

go.sum

@@ -8,6 +8,7 @@ github.com/alessio/shellescape v0.0.0-20190409004728-b115ca0f9053/go.mod h1:xW8s
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0 h1:3Jm3tLmsgAYcjC+4Up7hJrFBPr+n7rAqYeSw/SZazuY=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

pkg/cluster/internal/providers/podman/podman_util.go

@@ -19,6 +19,7 @@ package podman
 import (
 	"strings"
 
+	"sigs.k8s.io/kind/pkg/errors"
 	"sigs.k8s.io/kind/pkg/exec"
 )
 
@@ -36,3 +37,19 @@ func usernsRemap() bool {
 	}
 	return false
 }
+
+func version() (string, error) {
+	cmd := exec.Command("podman", "--version")
+	lines, err := exec.CombinedOutputLines(cmd)
+	if err != nil {
+		return "", err
+	}
+	if len(lines) != 1 {
+		return "", errors.Errorf("podman version should only be one line, got %d", len(lines))
+	}
+	contents := strings.Split(lines[0], " ")
+	if len(contents) != 3 {
+		return "", errors.Errorf("podman version contents should have 3 parts, got %d", len(contents))
+	}
+	return strings.TrimSuffix(contents[2], "-dev"), nil
+}

pkg/cluster/internal/providers/podman/provider.go

@@ -21,6 +21,7 @@ import (
 	"net"
 	"strings"
 
+	"github.com/coreos/go-semver/semver"
 	"k8s.io/apimachinery/pkg/util/sets"
 
 	"sigs.k8s.io/kind/pkg/cluster/nodes"
@@ -35,6 +36,10 @@ import (
 	"sigs.k8s.io/kind/pkg/internal/cli"
 )
 
+const (
+	minSupportedVersion = "1.7.1"
+)
+
 // NewProvider returns a new provider based on executing `podman ...`
 func NewProvider(logger log.Logger) provider.Provider {
 	return &Provider{
@@ -50,6 +55,14 @@ type Provider struct {
 
 // Provision is part of the providers.Provider interface
 func (p *Provider) Provision(status *cli.Status, cluster string, cfg *config.Cluster) (err error) {
+	// ensure that podman version is a compatible version
+	version, err := version()
+	if err != nil {
+		return err
+	}
+	if semver.New(version).Compare(*semver.New(minSupportedVersion)) < 0 {
+		return errors.Errorf("podman version %q is too old, please upgrade to %q or later", version, minSupportedVersion)
+	}
 	// TODO: validate cfg
 	// ensure node images are pulled before actually provisioning
 	if err := ensureNodeImages(p.logger, status, cfg); err != nil {