feat: Implement swctl status command (#98)

* Implement swctl status command

Signed-off-by: Peter Motičák <[email protected]>

* Remove unused file

Signed-off-by: Peter Motičák <[email protected]>

* Add additional flags to swctl status command

Signed-off-by: Peter Motičák <[email protected]>

* Cleanup code, add license headers

Signed-off-by: Peter Motičák <[email protected]>

* Address code review comments

Also improve StoneWork service management
IP address detection for swctl

Signed-off-by: Peter Motičák <[email protected]>

---------

Signed-off-by: Peter Motičák <[email protected]>

client/client.go

@@ -1,11 +1,61 @@
+// SPDX-License-Identifier: Apache-2.0
+
+// Copyright 2023 PANTHEON.tech
+//
+// 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 client
 
 import (
+	"context"
+	"crypto/tls"
+	"encoding/json"
 	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	docker "github.com/fsouza/go-dockerclient"
+	"github.com/sirupsen/logrus"
+	vppagent "go.ligato.io/vpp-agent/v3/cmd/agentctl/client"
+	"go.ligato.io/vpp-agent/v3/cmd/agentctl/client/tlsconfig"
+
+	"go.pantheon.tech/stonework/plugins/cnfreg"
+)
+
+const (
+	FallbackHost              = "127.0.0.1"
+	DefaultHTTPClientTimeout  = 60 * time.Second
+	DefaultPortHTTP           = 9191
+	DockerComposeServiceLabel = "com.docker.compose.service"
 )
 
 // Option is a function that customizes a Client.
-type Option func(*Client)
+type Option func(*Client) error
+
+func WithHTTPPort(p uint16) Option {
+	return func(c *Client) error {
+		c.httpPort = p
+		return nil
+	}
+}
+
+func WithHTTPTLS(cert, key, ca string, skipVerify bool) Option {
+	return func(c *Client) (err error) {
+		c.httpTLS, err = withTLS(cert, key, ca, skipVerify)
+		return err
+	}
+}
 
 // API defines client API. It is supposed to be used by various client
 // applications, such as swctl or other user applications interacting with
@@ -16,25 +66,196 @@ type API interface {
 
 // Client implements API interface.
 type Client struct {
-	components []Component
+	dockerClient      *docker.Client
+	httpClient        *http.Client
+	host              string
+	scheme            string
+	protocol          string
+	httpPort          uint16
+	httpTLS           *tls.Config
+	customHTTPHeaders map[string]string
 }
 
 // NewClient creates a new client that implements API. The client can be
 // customized by options.
 func NewClient(opts ...Option) (*Client, error) {
-	c := &Client{}
+	c := &Client{
+		scheme:   "http",
+		protocol: "tcp",
+		httpPort: DefaultPortHTTP,
+	}
+	var err error
+
+	c.dockerClient, err = docker.NewClientFromEnv()
+	if err != nil {
+		return nil, err
+	}
+
+	containers, err := c.dockerClient.ListContainers(docker.ListContainersOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	// find IP address of the StoneWork service
+	for _, container := range containers {
+		if container.Labels[DockerComposeServiceLabel] != "stonework" {
+			continue
+		}
+		cont, err := c.dockerClient.InspectContainerWithOptions(docker.InspectContainerOptions{ID: container.ID})
+		if err != nil {
+			return nil, err
+		}
+		for _, nw := range cont.NetworkSettings.Networks {
+			if nw.IPAddress != "" {
+				c.host = nw.IPAddress
+				break
+			}
+		}
+		break
+	}
+
 	for _, o := range opts {
-		o(c)
+		if err = o(c); err != nil {
+			return nil, err
+		}
+	}
+	if c.host == "" {
+		logrus.Warnf("could not find StoneWork service management IP address falling back to: %s", FallbackHost)
+		c.host = FallbackHost
+	} else {
+		logrus.Debugf("found StoneWork service management IP address: %s", c.host)
 	}
+
 	return c, nil
 }
 
-// GetComponents returns list of components.
+func (c *Client) DockerClient() *docker.Client {
+	return c.dockerClient
+}
+
+// HTTPClient returns configured HTTP client.
+func (c *Client) HTTPClient() *http.Client {
+	if c.httpClient == nil {
+		tr := http.DefaultTransport.(*http.Transport).Clone()
+		tr.TLSClientConfig = c.httpTLS
+		c.httpClient = &http.Client{
+			Transport: tr,
+			Timeout:   DefaultHTTPClientTimeout,
+		}
+	}
+	return c.httpClient
+}
+
+func withTLS(cert, key, ca string, skipVerify bool) (*tls.Config, error) {
+	var options []tlsconfig.Option
+	if cert != "" && key != "" {
+		options = append(options, tlsconfig.CertKey(cert, key))
+	}
+	if ca != "" {
+		options = append(options, tlsconfig.CA(ca))
+	}
+	if skipVerify {
+		options = append(options, tlsconfig.SkipServerVerification())
+	}
+	return tlsconfig.New(options...)
+}
+
+func (c *Client) StatusInfo(ctx context.Context) ([]cnfreg.Info, error) {
+	resp, err := c.get(ctx, "/status/info", nil, nil)
+	if err != nil {
+		return nil, fmt.Errorf("HTTP request failed: %w", err)
+	}
+	var infos []cnfreg.Info
+	if err := json.NewDecoder(resp.body).Decode(&infos); err != nil {
+		return nil, fmt.Errorf("decoding reply failed: %w", err)
+	}
+	return infos, nil
+}
+
 func (c *Client) GetComponents() ([]Component, error) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	infos, err := c.StatusInfo(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	dc := c.DockerClient()
+	containerInfo, err := dc.ListContainers(docker.ListContainersOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	var containers []*docker.Container
+	for _, container := range containerInfo {
+		c, err := dc.InspectContainerWithOptions(docker.InspectContainerOptions{ID: container.ID})
+		if err != nil {
+			return nil, err
+		}
+		containers = append(containers, c)
+	}
+
+	cnfInfos := make(map[string]cnfreg.Info)
+	for _, info := range infos {
+		cnfInfos[info.MsLabel] = info
+	}
+
 	var components []Component
+	for _, container := range containers {
+
+		metadata := make(map[string]string)
+		metadata["containerID"] = container.ID
+		metadata["containerName"] = container.Name
+		metadata["containerServiceName"] = container.Config.Labels[DockerComposeServiceLabel]
+		metadata["dockerImage"] = container.Config.Image
+		if container.NetworkSettings.IPAddress != "" {
+			metadata["containerIPAddress"] = container.NetworkSettings.IPAddress
+		} else {
+			for _, nw := range container.NetworkSettings.Networks {
+				if nw.IPAddress != "" {
+					metadata["containerIPAddress"] = nw.IPAddress
+					break
+				}
+			}
+		}
+
+		logrus.Tracef("found metadata for container: %s, data: %+v", container.Name, metadata)
 
-	// TODO: implement retrieval of components
+		compo := &component{Metadata: metadata}
+		after, found := containsPrefix(container.Config.Env, "MICROSERVICE_LABEL=")
+		if !found {
+			compo.Name = container.Config.Labels[DockerComposeServiceLabel]
+			compo.Mode = ComponentAuxiliary
+			components = append(components, compo)
+			continue
+		}
+		info, ok := cnfInfos[after]
+		if ok {
+			compo.Name = info.MsLabel
+			compo.Info = &info
+			compo.Mode = cnfModeToCompoMode(info.CnfMode)
+		} else {
+			compo.Name = container.Config.Labels[DockerComposeServiceLabel]
+			compo.Mode = ComponentStandalone
+		}
 
-	return components, fmt.Errorf("NOT IMPLEMENTED YET")
+		client, err := vppagent.NewClientWithOpts(vppagent.WithHost(info.IPAddr), vppagent.WithHTTPPort(info.HTTPPort))
+		if err != nil {
+			return components, err
+		}
+		compo.agentclient = client
+		components = append(components, compo)
+	}
+	return components, nil
+}
 
+func containsPrefix(strs []string, prefix string) (string, bool) {
+	for _, str := range strs {
+		found := strings.HasPrefix(str, prefix)
+		if found {
+			return strings.TrimPrefix(str, prefix), found
+		}
+	}
+	return "", false
 }