feat: provision docker installation

cli/server/add.go

@@ -14,10 +14,12 @@ import (
 	"coopcloud.tech/abra/cli/internal"
 	"coopcloud.tech/abra/pkg/client"
 	"coopcloud.tech/abra/pkg/server"
+	"coopcloud.tech/abra/pkg/ssh"
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/swarm"
 	dockerClient "github.com/docker/docker/client"
+	"github.com/sfreiberg/simplessh"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
@@ -40,6 +42,24 @@ var provisionFlag = &cli.BoolFlag{
 	Destination: &provision,
 }
 
+var sshAuth string
+var sshAuthFlag = &cli.StringFlag{
+	Name:        "ssh-auth",
+	Aliases:     []string{"sh"},
+	Value:       "identity-file",
+	Usage:       "Select SSH authentication method (identity-file, password)",
+	Destination: &sshAuth,
+}
+
+var askSudoPass bool
+var askSudoPassFlag = &cli.BoolFlag{
+	Name:        "ask-sudo-pass",
+	Aliases:     []string{"as"},
+	Value:       false,
+	Usage:       "Ask for sudo password",
+	Destination: &askSudoPass,
+}
+
 var traefik bool
 var traefikFlag = &cli.BoolFlag{
 	Name:        "traefik",
@@ -165,9 +185,67 @@ source for this script can be seen here:
 				logrus.Fatal("exiting as requested")
 			}
 
-			// TODO: implement this remote installer run
-			// https://stackoverflow.com/questions/37679939/how-do-i-execute-a-command-on-a-remote-machine-in-a-golang-cli
-			logrus.Warn("NOT IMPLEMENTED - COMING SOON")
+			hasIdentityFile := true
+			if sshAuth == "password" {
+				hasIdentityFile = false
+			}
+
+			hostConfig, err := ssh.GetHostConfig(domainName, hasIdentityFile)
+			if err != nil {
+				return err
+			}
+
+			var client *simplessh.Client
+			if sshAuth == "identity-file" {
+				var err error
+				client, err = simplessh.ConnectWithAgent(hostConfig.Host, hostConfig.User)
+				if err != nil {
+					return err
+				}
+			} else {
+				password := ""
+				prompt := &survey.Password{
+					Message: "SSH password?",
+				}
+				if err := survey.AskOne(prompt, &password); err != nil {
+					return err
+				}
+
+				var err error
+				client, err = simplessh.ConnectWithPassword(hostConfig.Host, hostConfig.User, password)
+				if err != nil {
+					return err
+				}
+			}
+
+			defer client.Close()
+			logrus.Debugf("successfully created SSH client for %s", domainName)
+
+			cmd := "curl -s https://get.docker.com | bash"
+
+			var sudoPass string
+			if askSudoPass {
+				prompt := &survey.Password{
+					Message: "sudo password?",
+				}
+				if err := survey.AskOne(prompt, &sudoPass); err != nil {
+					return err
+				}
+				logrus.Debugf("running '%s' on %s now with sudo password", cmd, domainName)
+				_, err := client.ExecSudo(cmd, sudoPass)
+				if err != nil {
+					return err
+				}
+			} else {
+				logrus.Debugf("running '%s' on %s now without sudo password", cmd, domainName)
+				_, err := client.Exec(cmd)
+				if err != nil {
+					return err
+				}
+			}
+
+			logrus.Infof("docker has successfully been installed on %s", domainName)
+
 			return nil
 		}
 	}
@@ -245,12 +323,24 @@ var serverAddCommand = &cli.Command{
 	Usage: "Add a server to your configuration",
 	Description: `
 This command adds a new server to your configuration so that it can be managed
-by Abra.
+by Abra. This can be useful when you already have a server provisioned and want
+to start running Abra commands against it. 
 
-This can be useful when you already have a server provisioned and want to start
-running Abra commands against it. This command can also provision your server
-("--provision/-p") so that it is capable of hosting Co-op Cloud apps. See below
-for more on that.
+This command can also provision your server ("--provision/-p") so that it is
+capable of hosting Co-op Cloud apps. Abra will default to expecting that you
+have a working SSH config for the host in your ~/.ssh/config file. E.g. for
+"example.com", you'll want to have something like:
+
+Host example.com
+  Hostname 192.168.178.31  # domain name also works
+  User myuserontheserver
+  Port 12345
+  IdentityFile ~/.ssh/mysecretkey.local
+
+If you have no SSH key configured for this host and are instead using password
+authentication, you may pass "--ssh-auth password" to have Abra ask you for the
+password. "--ask-sudo-pass" may be passed if you run your provisioning commands
+via sudo privilege escalation.
 
 If "--local" is passed, then Abra assumes that the current local server is
 intended as the target server. This is useful when you want to have your entire
@@ -285,6 +375,8 @@ You may omit flags to avoid performing this provisioning logic.
 	Flags: []cli.Flag{
 		localFlag,
 		provisionFlag,
+		sshAuthFlag,
+		askSudoPassFlag,
 		traefikFlag,
 	},
 	ArgsUsage: "<domain> [<user>] [<port>]",
@@ -299,6 +391,11 @@ You may omit flags to avoid performing this provisioning logic.
 			internal.ShowSubcommandHelpAndError(c, err)
 		}
 
+		if sshAuth != "password" || sshAuth != "identity-file" {
+			err := errors.New("--ssh-auth only accepts 'identity-file' or 'password'")
+			internal.ShowSubcommandHelpAndError(c, err)
+		}
+
 		if local {
 			if err := newLocalServer(c, "default"); err != nil {
 				logrus.Fatal(err)