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Add CLI data using Shell Command On MySQL (#722)
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Signed-off-by: ashraful <[email protected]>
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@AshrafulHaqueToni
AshrafulHaqueToni authored Sep 25, 2023
1 parent 3b6a62e commit 2b95f75
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Showing 2 changed files with 72 additions and 113 deletions.
2 changes: 1 addition & 1 deletion pkg/data/mariadb.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -109,7 +109,7 @@ func (opts *mariadbOpts) insertDataExecCmd(tunnel *portforward.Tunnel, rows int)
WHILE counter <= max_value DO
SET result = '';
SET i = 0;
WHILE i < 10 DO
WHILE i < 15 DO
SET result = CONCAT(result, SUBSTRING(characters, FLOOR(RAND() * 81) + 1, 1));
SET i = i + 1;
END WHILE;
Expand Down
183 changes: 71 additions & 112 deletions pkg/data/mysql.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -19,26 +19,31 @@ package data
import (
"bytes"
"context"
"errors"
"fmt"
"log"
"os"
"os/exec"
"strconv"
"strings"

api "kubedb.dev/apimachinery/apis/kubedb/v1alpha2"
cs "kubedb.dev/apimachinery/client/clientset/versioned"
"kubedb.dev/cli/pkg/lib"

_ "github.com/go-sql-driver/mysql"
"github.com/spf13/cobra"
shell "gomodules.xyz/go-sh"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/klog/v2"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
"kmodules.xyz/client-go/tools/portforward"
)

const (
myCaFile = "/etc/mysql/certs/ca.crt"
myCertFile = "/etc/mysql/certs/client.crt"
myKeyFile = "/etc/mysql/certs/client.key"
)

func InsertMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
Expand Down Expand Up @@ -75,14 +80,7 @@ func InsertMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
log.Fatal("Inserted rows must be greater than 0")
}

tunnel, err := lib.TunnelToDBService(opts.config, dbName, namespace, api.MySQLDatabasePort)
if err != nil {
log.Fatal("couldn't create tunnel, error: ", err)
}

defer tunnel.Close()

err = opts.insertDataExecCmd(tunnel, rows)
err = opts.insertDataExecCmd(rows)
if err != nil {
log.Fatal(err)
}
Expand All @@ -94,7 +92,7 @@ func InsertMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
return myInsertCmd
}

func (opts *mysqlOpts) insertDataExecCmd(tunnel *portforward.Tunnel, rows int) error {
func (opts *mysqlOpts) insertDataExecCmd(rows int) error {
command := `
USE mysql;
CREATE TABLE IF NOT EXISTS kubedb_table (id VARCHAR(255) PRIMARY KEY);
Expand All @@ -109,7 +107,7 @@ func (opts *mysqlOpts) insertDataExecCmd(tunnel *portforward.Tunnel, rows int) e
WHILE counter <= max_value DO
SET result = '';
SET i = 0;
WHILE i < 10 DO
WHILE i < 15 DO
SET result = CONCAT(result, SUBSTRING(characters, FLOOR(RAND() * 81) + 1, 1));
SET i = i + 1;
END WHILE;
Expand All @@ -121,7 +119,7 @@ func (opts *mysqlOpts) insertDataExecCmd(tunnel *portforward.Tunnel, rows int) e
CALL insert_data(` + fmt.Sprintf("%v", rows) + `);
`

_, err := opts.executeCommand(tunnel.Local, command)
_, err := opts.executeCommand(command)
if err != nil {
return err
}
Expand Down Expand Up @@ -160,13 +158,7 @@ func VerifyMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
log.Fatalln(err)
}

tunnel, err := lib.TunnelToDBService(opts.config, dbName, namespace, api.MySQLDatabasePort)
if err != nil {
log.Fatal("couldn't create tunnel, error: ", err)
}
defer tunnel.Close()

err = opts.verifyDataExecCmd(tunnel, rows)
err = opts.verifyDataExecCmd(rows)
if err != nil {
log.Fatal(err)
}
Expand All @@ -178,7 +170,7 @@ func VerifyMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
return myVerifyCmd
}

func (opts *mysqlOpts) verifyDataExecCmd(tunnel *portforward.Tunnel, rows int) error {
func (opts *mysqlOpts) verifyDataExecCmd(rows int) error {
if rows <= 0 {
return fmt.Errorf("rows need to be greater than 0")
}
Expand All @@ -187,14 +179,15 @@ func (opts *mysqlOpts) verifyDataExecCmd(tunnel *portforward.Tunnel, rows int) e
USE mysql;
SELECT COUNT(*) FROM kubedb_table;
`
out, err := opts.executeCommand(tunnel.Local, command)
o, err := opts.executeCommand(command)
if err != nil {
return err
}

out := string(o)
output := strings.Split(out, "\n")

totalKeys, err := strconv.Atoi(strings.TrimPrefix(output[1], " "))
totalKeys, err := strconv.Atoi(strings.TrimSpace(output[1]))
if err != nil {
return err
}
Expand Down Expand Up @@ -233,13 +226,7 @@ func DropMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
log.Fatalln(err)
}

tunnel, err := lib.TunnelToDBService(opts.config, dbName, namespace, api.MySQLDatabasePort)
if err != nil {
log.Fatal("couldn't create tunnel, error: ", err)
}
defer tunnel.Close()

err = opts.dropDataExecCmd(tunnel)
err = opts.dropDataExecCmd()
if err != nil {
log.Fatal(err)
}
Expand All @@ -249,12 +236,12 @@ func DropMySQLDataCMD(f cmdutil.Factory) *cobra.Command {
return myDropCmd
}

func (opts *mysqlOpts) dropDataExecCmd(tunnel *portforward.Tunnel) error {
func (opts *mysqlOpts) dropDataExecCmd() error {
command := `
USE mysql;
DROP TABLE IF EXISTS kubedb_table;
`
_, err := opts.executeCommand(tunnel.Local, command)
_, err := opts.executeCommand(command)
if err != nil {
return err
}
Expand Down Expand Up @@ -319,101 +306,73 @@ func newMySQLOpts(f cmdutil.Factory, dbName, namespace string) (*mysqlOpts, erro
}, nil
}

func (opts *mysqlOpts) getDockerShellCommand(localPort int, dockerFlags, mysqlExtraFlags []interface{}) (*shell.Session, error) {
sh := shell.NewSession()
sh.ShowCMD = false

func (opts *mysqlOpts) getShellCommand(command string) (string, error) {
db := opts.db
dockerCommand := []interface{}{
"run", "--network=host",
"-e", fmt.Sprintf("MYSQL_PWD=%s", opts.pass),
cmd := ""
user, password, err := opts.GetMySQLAuthCredentials(db)
if err != nil {
return "", err
}
dockerCommand = append(dockerCommand, dockerFlags...)
containerName := "mysql"
label := opts.db.OffshootLabels()

mysqlCommand := []interface{}{
"mysql",
"--host=127.0.0.1", fmt.Sprintf("--port=%d", localPort),
fmt.Sprintf("--user=%s", opts.username),
if *opts.db.Spec.Replicas > 1 {
label["kubedb.com/role"] = "primary"
}

pods, err := opts.client.CoreV1().Pods(db.Namespace).List(context.TODO(), metav1.ListOptions{
LabelSelector: labels.Set.String(label),
})
if err != nil || len(pods.Items) == 0 {
return "", err
}
if db.Spec.TLS != nil {
secretName := db.CertificateName(api.MySQLClientCert)
certSecret, err := opts.client.CoreV1().Secrets(db.Namespace).Get(context.TODO(), secretName, metav1.GetOptions{})
if err != nil {
return nil, err
}

caCrt, ok := certSecret.Data[corev1.ServiceAccountRootCAKey]
if !ok {
return nil, fmt.Errorf("missing %s in secret %s/%s", corev1.ServiceAccountRootCAKey, certSecret.Namespace, certSecret.Name)
}
err = os.WriteFile(caFile, caCrt, 0o644)
if err != nil {
return nil, err
}

crt, ok := certSecret.Data[corev1.TLSCertKey]
if !ok {
return nil, fmt.Errorf("missing %s in secret %s/%s", corev1.TLSCertKey, certSecret.Namespace, certSecret.Name)
}
err = os.WriteFile(certFile, crt, 0o644)
if err != nil {
return nil, err
}

key, ok := certSecret.Data[corev1.TLSPrivateKeyKey]
if !ok {
return nil, fmt.Errorf("missing %s in secret %s/%s", corev1.TLSPrivateKeyKey, certSecret.Namespace, certSecret.Name)
}
err = os.WriteFile(keyFile, key, 0o644)
if err != nil {
return nil, err
}

dockerCommand = append(dockerCommand,
"-v", fmt.Sprintf("%s:%s", caFile, caFile),
"-v", fmt.Sprintf("%s:%s", certFile, certFile),
"-v", fmt.Sprintf("%s:%s", keyFile, keyFile),
)
mysqlCommand = append(mysqlCommand,
fmt.Sprintf("--ssl-ca=%v", caFile),
fmt.Sprintf("--ssl-cert=%v", certFile),
fmt.Sprintf("--ssl-key=%v", keyFile),
)
cmd = fmt.Sprintf("kubectl exec -n %s %s -c %s -- mysql -u%s -p'%s' --host=%s --port=%s --ssl-ca='%v' --ssl-cert='%v' --ssl-key='%v' %s -e \"%s\"", db.Namespace, pods.Items[0].Name, containerName, user, password, "127.0.0.1", "3306", myCaFile, myCertFile, myKeyFile, api.ResourceSingularMySQL, command)
} else {
cmd = fmt.Sprintf("kubectl exec -n %s %s -c %s -- mysql -u%s -p'%s' %s -e \"%s\"", db.Namespace, pods.Items[0].Name, containerName, user, password, api.ResourceSingularMySQL, command)
}

dockerCommand = append(dockerCommand, opts.dbImage)
finalCommand := append(dockerCommand, mysqlCommand...)
if mysqlExtraFlags != nil {
finalCommand = append(finalCommand, mysqlExtraFlags...)
}
return sh.Command("docker", finalCommand...).SetStdin(os.Stdin), nil
return cmd, err
}

func (opts *mysqlOpts) executeCommand(localPort int, command string) (string, error) {
mysqlExtraFlags := []interface{}{
"-e", command,
func (opts *mysqlOpts) GetMySQLAuthCredentials(db *api.MySQL) (string, string, error) {
if db.Spec.AuthSecret == nil {
return "", "", errors.New("no database secret")
}

shSession, err := opts.getDockerShellCommand(localPort, nil, mysqlExtraFlags)
secret, err := opts.client.CoreV1().Secrets(db.Namespace).Get(context.TODO(), db.Spec.AuthSecret.Name, metav1.GetOptions{})
if err != nil {
return "", err
return "", "", err
}
return string(secret.Data[corev1.BasicAuthUsernameKey]), string(secret.Data[corev1.BasicAuthPasswordKey]), nil
}

out, err := shSession.Output()
func (opts *mysqlOpts) executeCommand(command string) ([]byte, error) {
cmd, err := opts.getShellCommand(command)
if err != nil {
return "", fmt.Errorf("failed to execute file, error: %s, output: %s\n", err, out)
return nil, err
}

output := ""
if string(out) != "" {
output = ", output:\n\n" + string(out)
output, err := opts.runCMD(cmd)
if err != nil {
return nil, err
}
return output, nil
}

errOutput := opts.errWriter.String()
if errOutput != "" {
return "", fmt.Errorf("failed to execute command, stderr: %s%s", errOutput, output)
func (opts *mysqlOpts) runCMD(cmd string) ([]byte, error) {
sh := exec.Command("/bin/sh", "-c", cmd)
stdout := bytes.NewBuffer(nil)
stderr := bytes.NewBuffer(nil)
sh.Stdout = stdout
sh.Stderr = stderr
err := sh.Run()
out := stdout.Bytes()
errOut := stderr.Bytes()
errOutput := string(errOut)
if errOutput != "" && !strings.Contains(errOutput, "NOTICE") && !strings.Contains(errOutput, "Warning") {
return nil, fmt.Errorf("failed to execute command, stderr: %s", errOutput)
}

return string(out), nil
if err != nil {
return nil, err
}
return out, nil
}

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