containerd/remotes/docker/config/hosts_test.go

/*
   Copyright The containerd Authors.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package config

import (
	"bytes"
	"context"
	"fmt"
	"path/filepath"
	"testing"

	"github.com/containerd/containerd/remotes/docker"
)

func TestParseHostFile(t *testing.T) {
	ctx := context.Background()

	const testtoml = `
server = "https://test-default.registry"
ca = "/etc/path/default"

[host."https://mirror.registry"]
  capabilities = ["pull"]
  ca = "/etc/certs/mirror.pem"

[host."https://mirror-bak.registry/us"]
  capabilities = ["pull"]
  skip_verify = true

[host."http://mirror.registry"]
  capabilities = ["pull"]

[host."https://test-1.registry"]
  capabilities = ["pull", "resolve", "push"]
  ca = ["/etc/certs/test-1-ca.pem", "/etc/certs/special.pem"]
  client = [["/etc/certs/client.cert", "/etc/certs/client.key"],["/etc/certs/client.pem", ""]]

[host."https://test-2.registry"]
  client = "/etc/certs/client.pem"

[host."https://test-3.registry"]
  client = ["/etc/certs/client-1.pem", "/etc/certs/client-2.pem"]
`
	var tb, fb = true, false
	var allCaps = docker.HostCapabilityPull | docker.HostCapabilityResolve | docker.HostCapabilityPush
	expected := []hostConfig{
		{
			scheme:       "https",
			host:         "mirror.registry",
			path:         "/v2",
			capabilities: docker.HostCapabilityPull,
			caCerts:      []string{filepath.FromSlash("/etc/certs/mirror.pem")},
			skipVerify:   &fb,
		},
		{
			scheme:       "https",
			host:         "mirror-bak.registry",
			path:         "/us/v2",
			capabilities: docker.HostCapabilityPull,
			skipVerify:   &tb,
		},
		{
			scheme:       "http",
			host:         "mirror.registry",
			path:         "/v2",
			capabilities: docker.HostCapabilityPull,
		},
		{
			scheme:       "https",
			host:         "test-1.registry",
			path:         "/v2",
			capabilities: allCaps,
			caCerts:      []string{filepath.FromSlash("/etc/certs/test-1-ca.pem"), filepath.FromSlash("/etc/certs/special.pem")},
			clientPairs: [][2]string{
				{filepath.FromSlash("/etc/certs/client.cert"), filepath.FromSlash("/etc/certs/client.key")},
				{filepath.FromSlash("/etc/certs/client.pem"), ""},
			},
			skipVerify: &fb,
		},
		{
			scheme:       "https",
			host:         "test-2.registry",
			path:         "/v2",
			capabilities: allCaps,
			clientPairs: [][2]string{
				{filepath.FromSlash("/etc/certs/client.pem")},
			},
			skipVerify: &fb,
		},
		{
			scheme:       "https",
			host:         "test-3.registry",
			path:         "/v2",
			capabilities: allCaps,
			clientPairs: [][2]string{
				{filepath.FromSlash("/etc/certs/client-1.pem")},
				{filepath.FromSlash("/etc/certs/client-2.pem")},
			},
			skipVerify: &fb,
		},
		{
			scheme:       "https",
			host:         "test-default.registry",
			path:         "/v2",
			capabilities: allCaps,
			skipVerify:   &fb,
		},
	}
	hosts, err := parseHostsFile(ctx, "", []byte(testtoml))
	if err != nil {
		t.Fatal(err)
	}

	defer func() {
		if t.Failed() {
			t.Log("HostConfigs...\nActual:\n" + printHostConfig(hosts) + "Expected:\n" + printHostConfig(expected))
		}
	}()

	if len(hosts) != len(expected) {
		t.Fatalf("Unexpected number of hosts %d, expected %d", len(hosts), len(expected))
	}

	for i := range hosts {
		if !compareHostConfig(hosts[i], expected[i]) {
			t.Fatalf("Mismatch at host %d", i)
		}
	}
}

func compareHostConfig(j, k hostConfig) bool {
	if j.scheme != k.scheme {
		return false
	}
	if j.host != k.host {
		return false
	}
	if j.path != k.path {
		return false
	}
	if j.capabilities != k.capabilities {
		return false
	}

	if len(j.caCerts) != len(k.caCerts) {
		return false
	}
	for i := range j.caCerts {
		if j.caCerts[i] != k.caCerts[i] {
			return false
		}
	}
	if len(j.clientPairs) != len(k.clientPairs) {
		return false
	}
	for i := range j.clientPairs {
		if j.clientPairs[i][0] != k.clientPairs[i][0] {
			return false
		}
		if j.clientPairs[i][1] != k.clientPairs[i][1] {
			return false
		}
	}
	if j.skipVerify != nil && k.skipVerify != nil {
		if *j.skipVerify != *k.skipVerify {
			return false
		}
	} else if j.skipVerify != nil || k.skipVerify != nil {
		return false
	}

	return true
}

func printHostConfig(hc []hostConfig) string {
	b := bytes.NewBuffer(nil)
	for i := range hc {
		fmt.Fprintf(b, "\t[%d]\tscheme: %q\n", i, hc[i].scheme)
		fmt.Fprintf(b, "\t\thost: %q\n", hc[i].host)
		fmt.Fprintf(b, "\t\tpath: %q\n", hc[i].path)
		fmt.Fprintf(b, "\t\tcaps: %03b\n", hc[i].capabilities)
		fmt.Fprintf(b, "\t\tca: %#v\n", hc[i].caCerts)
		fmt.Fprintf(b, "\t\tclients: %#v\n", hc[i].clientPairs)
		if hc[i].skipVerify == nil {
			fmt.Fprintf(b, "\t\tskip-verify: %v\n", hc[i].skipVerify)
		} else {
			fmt.Fprintf(b, "\t\tskip-verify: %t\n", *hc[i].skipVerify)
		}
	}
	return b.String()
}