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
+			hasIdentityFile := true
-			// https://stackoverflow.com/questions/37679939/how-do-i-execute-a-command-on-a-remote-machine-in-a-golang-cli
+			if sshAuth == "password" {
-			logrus.Warn("NOT IMPLEMENTED - COMING SOON")
+				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
+This command can also provision your server ("--provision/-p") so that it is
-running Abra commands against it. This command can also provision your server
+capable of hosting Co-op Cloud apps. Abra will default to expecting that you
-("--provision/-p") so that it is capable of hosting Co-op Cloud apps. See below
+have a working SSH config for the host in your ~/.ssh/config file. E.g. for
-for more on that.
+"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)

go.mod

@@ -28,16 +28,20 @@ require (
 	coopcloud.tech/libcapsul v0.0.0-20211022074848-c35e78fe3f3e
 	github.com/Microsoft/hcsshim v0.8.21 // indirect
 	github.com/containerd/containerd v1.5.5 // indirect
+	github.com/davidmz/go-pageant v1.0.2 // indirect
 	github.com/docker/docker-credential-helpers v0.6.4 // indirect
 	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
 	github.com/fvbommel/sortorder v1.0.2 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
 	github.com/gorilla/mux v1.8.0 // indirect
+	github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351
 	github.com/libdns/gandi v1.0.2
 	github.com/libdns/libdns v0.2.1
 	github.com/moby/sys/mount v0.2.0 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/opencontainers/runc v1.0.2 // indirect
+	github.com/pkg/sftp v1.13.4 // indirect
+	github.com/sfreiberg/simplessh v0.0.0-20180301191542-495cbb862a9c
 	github.com/theupdateframework/notary v0.7.0 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
 )

go.sum

@@ -253,6 +253,8 @@ github.com/danieljoos/wincred v1.1.0/go.mod h1:XYlo+eRTsVA9aHGp7NGjFkPla4m+DCL7h
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davidmz/go-pageant v1.0.2 h1:bPblRCh5jGU+Uptpz6LgMZGD5hJoOt7otgT454WvHn0=
+github.com/davidmz/go-pageant v1.0.2/go.mod h1:P2EDDnMqIwG5Rrp05dTRITj9z2zpGcD9efWSkTNKLIE=
 github.com/denisenkom/go-mssqldb v0.0.0-20191128021309-1d7a30a10f73/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/denverdino/aliyungo v0.0.0-20190125010748-a747050bb1ba/go.mod h1:dV8lFg6daOBZbT6/BDGIz6Y3WFGn8juu6G+CQ6LHtl0=
 github.com/dgrijalva/jwt-go v0.0.0-20170104182250-a601269ab70c/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
@@ -499,6 +501,8 @@ github.com/klauspost/compress v1.11.13/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdY
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
+github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
@@ -639,6 +643,8 @@ github.com/pkg/errors v0.8.1-0.20171018195549-f15c970de5b7/go.mod h1:bwawxfHBFNV
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/sftp v1.13.4 h1:Lb0RYJCmgUcBgZosfoi9Y9sbl6+LJgOIgk/2Y4YjMFg=
+github.com/pkg/sftp v1.13.4/go.mod h1:LzqnAvaD5TWeNBsZpfKxSYn1MbjWwOsCIAFFJbpIsK8=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/cachecontrol v0.0.0-20171018203845-0dec1b30a021/go.mod h1:prYjPmNq4d1NPVmpShWobRqXY3q7Vp+80DqgxxUrUIA=
@@ -693,6 +699,8 @@ github.com/schultz-is/passgen v1.0.1/go.mod h1:NnqzT2aSfvyheNQvBtlLUa0YlPFLDj60J
 github.com/seccomp/libseccomp-golang v0.9.1/go.mod h1:GbW5+tmTXfcxTToHLXlScSlAvWlF4P2Ca7zGrPiEpWo=
 github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
 github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
+github.com/sfreiberg/simplessh v0.0.0-20180301191542-495cbb862a9c h1:7Q+2oF0uBoLEV+j13E3/xUkPkI7f+sFNPZOPo2jmrWk=
+github.com/sfreiberg/simplessh v0.0.0-20180301191542-495cbb862a9c/go.mod h1:sB7d6wQapoRM+qx5MgQYB6JVHtel4YHRr0NXXCkXiwQ=
 github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.0.4-0.20170822132746-89742aefa4b2/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
@@ -819,6 +827,7 @@ golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20201117144127-c1f2f97bffc9/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
+golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -965,6 +974,7 @@ golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210426230700-d19ff857e887/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210502180810-71e4cd670f79/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

pkg/ssh/ssh.go

@@ -0,0 +1,45 @@
+package ssh
+
+import (
+	"fmt"
+
+	"github.com/kevinburke/ssh_config"
+)
+
+// HostConfig is a SSH host config.
+type HostConfig struct {
+	Host         string
+	IdentityFile string
+	Port         string
+	User         string
+}
+
+// GetHostConfig retrieves a ~/.ssh/config config for a host.
+func GetHostConfig(hostname string, hasIdentityFile bool) (HostConfig, error) {
+	var hostConfig HostConfig
+
+	var host, user, port, idf string
+
+	if host = ssh_config.Get(hostname, "Hostname"); host == "" {
+		return hostConfig, fmt.Errorf("SSH hostname missing for %s from SSH config", hostname)
+	}
+
+	if user = ssh_config.Get(hostname, "User"); user == "" {
+		return hostConfig, fmt.Errorf("SSH user missing for %s from SSH config", hostname)
+	}
+
+	if port = ssh_config.Get(hostname, "Port"); port == "" {
+		return hostConfig, fmt.Errorf("SSH port missing for %s from SSH config", hostname)
+	}
+
+	if idf = ssh_config.Get(hostname, "IdentityFile"); idf == "" && hasIdentityFile {
+		return hostConfig, fmt.Errorf("SSH identity file missing for %s from SSH config", hostname)
+	}
+
+	hostConfig.Host = host
+	hostConfig.IdentityFile = idf
+	hostConfig.Port = port
+	hostConfig.User = user
+
+	return hostConfig, nil
+}