Open Source sqoop-shell Tool Usage Guide

Overview

This section applies to MRS 3.x or later.

Sqoop-shell is a shell tool of Loader. All its functions are implemented by executing the sqoop2-shell script.

The sqoop-shell tool provides the following functions:

• Creating and updating connectors
• Creating and updating jobs
• Deleting connectors and jobs
• Starting jobs in the synchronous or asynchronous mode.
• Stopping jobs
• Viewing job status
• Viewing historical execution records of jobs
• Cloning connectors and jobs
• Creating and updating conversion steps
• Specifying line and field separators

The sqoop-shell tool supports the following modes:

• Interaction mode

  Users execute the sqoop2-shell script without parameters to go to the particular interaction window of Loader. After the contents of the script are input, the tool returns the relevant information to the interaction window.

• Batch mode

  The sqoop2-shell script has a file name as a parameter and multiple commands are stored in lines in the file. The sqoop-shell tool runs all commands in the file in sequence by executing the script. Alternatively, users can execute the sqoop2-shell script, to the end of which a command is attached with the -c parameter as the bridge. In this case, the sqoop-shell tool runs one command each time.

The sqoop-shell implements functions of Loader by running the commands in Table 1.

Commands

• The sqoop2-shell tool provides two methods to obtain login authentication information. The first method is to obtain login authentication information from the configuration file. For details about the configuration items, see Example for Using the Open-Source sqoop-shell Tool (SFTP-HDFS) and Example for Using the Open-Source sqoop-shell Tool (Oracle-HBase). The second one is to obtain the authentication information by using parameters. Two modes are available in the second method: password mode and Kerberos authentication mode.
• Command for accessing the interaction mode

  Execute the sqoop2-shell script without parameters to go to the sqoop tool window and run the commands one by one.

  Run the following command to obtain the authentication information by reading the configuration file:

  ./sqoop2-shell

  Run the following command to authenticate login using the password mode:

  ./sqoop2-shell -uk false -u username -p encryptedPassword

  Run the following command to authenticate login using the Kerberos mode:

  ./sqoop2-shell -uk true -k user.keytab -s userPrincipal

  The following information is displayed:

  Welcome to sqoop client
  Use the username and password authentication mode
  Authentication success.
  Sqoop Shell: Type 'help' or '\h' for help.
  
  sqoop:000> 

• Command for entering the batch mode

  Two methods are available for accessing the batch mode.

  1. Execute the sqoop2-shell script, in which a file name is used as a parameter and multiple commands are stored in lines in this file. The sqoop-shell tool runs all commands in the file in sequence. The script must be stored in the home directory of the current user, for example, /root/batchCommand.sh.

  Run the following command to authenticate login by reading configuration files:

  ./sqoop2-shell /root/batchCommand.sh

  Run the following command to authenticate login using the password mode:

  ./sqoop2-shell -uk false -u username -p encryptedPassword /root/batchCommand.sh

  Run the following command to authenticate login using the Kerberos mode:

  ./sqoop2-shell -uk true -k user.keytab -s userPrincipal /root/batchCommand.sh

  batchCommand.sh is the user-defined name of the text file.

  2. Execute the sqoop2-shell script, to the end of which a command is attached with the -c parameter as the bridge. The sqoop-shell tool will execute the command.

  Run the following command to authenticate login by reading configuration files:

  ./sqoop2-shell -c expression

  Run the following command to authenticate login using the password mode:

  ./sqoop2-shell -uk false -u username -p encryptedPassword -c expression

  Run the following command to authenticate login using the Kerberos mode:

  ./sqoop2-shell -uk true -k user.keytab -s userPrincipal -c expression

  expression is the attached statement, whose format is the same as that in the text file in the first method.

• Exit command

  This command is used for exiting the interaction mode and supported only in the interaction mode.

  Example:

  Welcome to sqoop client
  Use the username and password authentication mode
  Authentication success.
  Sqoop Shell: Type 'help' or '\h' for help.
  
  sqoop:000> exit
  10-5-211-9:/opt/hadoopclient/Loader/loader-tools-1.99.3/sqoop-shell#

• History command

  This command is used for viewing the executed commands and supported only in the interaction mode.

  Example:

  sqoop:000> history
     0  show connector
     1  create connection -c 4
     2  show connections;
     3  show connection;
     4  show connection -a;
     5  show connections;
     6  show connection;
     7  show connection -x 53;
     8  show connection -x 52;
     9  show connection -x 2
    10  show connection -x 53;
    11  show connection
    12  show connection -x 53
    13  create job -x 53 -t import
    14  show connector
    15  create connection -c 5
    16  show connection -x 54
    17  exit
    18  show connector
    19  create connection -c 5
    20  exit
    21  show connector
    22  create connection -c 6
    23  create job -x 20 -t import
    24  start job -j 85 -s
    25  \x
    26  exit
    27  history
  sqoop:000> 

• Help command

  This command is used for viewing the tool help information.

  Example:

  sqoop:000> help
  For information about Sqoop, visit: http://sqoop.apache.org/docs/1.99.3/index.html
  
  Available commands:
    exit    (\x  ) Exit the shell
    history (\H  ) Display, manage and recall edit-line history
    help    (\h  ) Display this help message
    set     (\st ) Set server or option Info
    show    (\sh ) Show server, connector, framework, connection, job, submission or option Info
    create  (\cr ) Create connection or job Info
    delete  (\d  ) Delete connection or job Info
    update  (\up ) Update connection or job Info
    clone   (\cl ) Clone connection or job Info
    start   (\sta) Start job
    stop    (\stp) Stop job
    status  (\stu) Status job
  
  For help on a specific command type: help command
  
  sqoop:000> 

• Set command

  The set command is used for setting attributes of clients and servers and supports the following attributes:

  • server indicates setting the connection attributes for servers.
    

    When attribute -u is set, attributes -h, -p, and -w can be ignored.

  • option indicates setting the client attributes.
    

    option can be set by key values. For example, set option --name verbose --value true.

    Attribute Type	Subattribute	Description
    server	-h,--host	Service IP address.
    	-p,--port	Service Port
    	-w,--webapp	Tomcat application name.
    	-u,--url	Sqoop service URL.
    option	verbose	Redundancy mode, which indicates that more information is printed.
    	poll-timeout	Sets the polling timeout duration.

  Example:

  set option --name verbose --value false
  set server --host 10.0.0.1 --port 21351 --webapp loader

• show command

  This command is used for displaying information, such as variable information and storage metadata information.

  Attribute Type	Subattribute	Description
  server	-a,--all	Displays all server attributes.
  	-p,--port	Displays the service port.
  	-w,--webapp	Displays the Tomcat application name.
  	-h,--host	Displays the service IP address.
  option	-name	Displays the attributes of the specified name.
  connector	-a,--all	Displays information about all connection types.
  	-c,--cid	Displays information about the connection type of a specified ID.
  framework	None.	Displays metadata information about frameworks.
  connection	-a,--all	Displays all connection attributes.
  	-x,--xid	Displays the attributes of a specified connection.
  	-n,--name	Displays the connection attributes of a specified name.
  job	-a,--all	Displays information about all jobs.
  	-j,--jid	Displays job information about a specified ID.
  	-n,--name	Displays job information about a specified name.
  submission	-j,--jid	Displays the submission record of a specified job.
  	-d,--detail	Displays details.

  Example:

  show server -all
  show option --name verbose
  show connector -all
  show framework
  show connection -all
  show connection -n sftp-example
  show job -all
  show job -j 1
  show submission --jid 1
  show submission --jid 1 -d

• Create command
  This command is used for creating connectors and jobs.

  Attribute Type	Subattribute	Description
  connection	-c,--cid	Specifies the ID of a connector type.
  	-cn,--cname	Specifies the name of a specified connector type.
  job	-x,--xid	Specifies the connector ID.
  	-xn,--xname	Specifies the connector name.
  	-t,--type	Specifies the job type. Possible values: import export

  • In the interaction mode, enter the attribute values one by one as prompted.

    Example for creating connectors:

    create connection -c 1
    create connection -cn example

    Example for creating jobs:

    create job -x 1 -t import
    create job -xn job_example -t export

  • In the batch mode, run the following command to view the specific attribute and then set a value for the attribute:

    create job -t import -x 1 --help

    You can run the above command in either of the following ways:

    Save the command to a text file and attach this file to the end of the sqoop-shell script, and run the following command:

    ./sqoop2-shell batchCommand.sh

    Attach a command with the -c parameter to the end of the sqoop-shell script and run the following command:

    ./sqoop2-shell -c expression

    For details about command execution, refer to previous description in this section. The following shows two complete commands:

    Example for creating connectors:

    create connection -c 4 --connector-connection-sftpPassword xxxxx --connector-connection-sftpServerIp 10.0.0.1 --connector-connection-sftpServerPort 22 --connector-connection-sftpUser root--name testConnection

    Example for creating jobs:

    create job -t import -x 1 --connector-file-inputPath /opt/tempfile --connector-file-fileFilter * --framework-output-outputDirectory /user/loader/1 --framework-output-storageType HDFS --framework-throttling-extractorSize 120 --framework-output-fileType TEXT_FILE --connector-file-splitType FILE -queue default -priority low -name newJob

  • In the batch mode, you can attach a statement using the -c parameter as the bridge.

    Example for creating connectors:

    ./sqoop2-shell -c "create connection -c 4 --connector-connection-sftpPassword xxxxx --connector-connection-sftpServerIp 10.0.0.1 --connector-connection-sftpServerPort 22 --connector-connection-sftpUser root--name testConnection"

• update command

  This command is used for updating connectors and jobs.

  Attribute Type	Subattribute	Description
  connection	-x,--xid	Specifies the connector ID. NOTE: When the connectors are updated, the password must be set.
  job	-j,--jid	Specifies the job ID.

  • Interaction mode

    Example for updating connectors:

    update connection --xid 1

    Example for updating jobs:

    update job --jid 1

  • Batch mode

    Example for updating connectors:

    update connection -x 6 --connector-connection-sftpServerPort 21 - --name sfp_130--connector-connection-sftpPassword xxxx

    Example for updating jobs:

    Example 1:

    update job -jid 1 -name sftp2hdfs --connector-file-fileFilter *.txt

    Example 2:

    ./sqoop2-shell -uk true -k /opt/loader/user.keytab -s luser /opt/loader/testupdate.txt
    ./sqoop2-shell -uk true -k /opt/loader/user.keytab -s luser -c "update job --jid 24 --name oracle-hive --connector-table-sql 'SELECT * FROM range_example WHERE replace(datadt,\'-\',\'\')='20240801' and \${CONDITIONS}'"

    

    When updating a job, you can write the update commands in a file, for example, /opt/loader/testupdate.txt (the file name can be customized), or specify the commands using --connector-table-sql, in which the sql command must be enclosed in single quotation marks ('). For details, see example 2. Involved commands include connector-table-sql, connector-table-columns, connector-table-partitionColumn, connector-table-conditions, connector-table-queryCondition.

• delete command

  This command is used for deleting connectors and jobs.

  Attribute Type	Subattribute	Description
  connection	-x,--xid	Specifies the connector ID.
  	-n,--name	Specifies the connector name.
  job	-j,--jid	Specifies the job ID.
  	-n,--name	Specifies the job name.

  Example:

  delete connection -x 1
  delete connection --name abc
  delete job -j 1
  delete job -n qwerty

• clone command

  This command is used for cloning connectors and jobs.

  Attribute Type	Subattribute	Description
  connection	-x,--xid	Specifies the connector ID. NOTE: The password and connector name must be entered when the connectors are cloned.
  job	-j,--jid	Specifies the job ID.

  Example:

  clone job -j 1

• start command

  This command is used for starting jobs.

  Attribute Type	Subattribute	Description
  job	-j,--jid	Specifies the job ID.
  	-n,--name	Specifies the job name.
  	-s,--synchronous	Whether to start jobs in the synchronous mode or not.

  Example for starting jobs in the asynchronous mode:

  start job -j 1
  start job -n abc

  Example for starting jobs in the synchronous mode:

  start job -j 1 -s
  start job --name abc --synchronous

• stop command

  This command is used for stopping jobs.

  Attribute Type	Subattribute	Description
  job	-j,--jid	Specifies the job ID.
  	-n,--name	Specifies the job name.

  Example:

  stop job -j 1
  stop job -n abc

• Status command

  This command is used for viewing job status.

  Attribute Type	Subattribute	Description
  job	-j,--jid	Specifies the job ID.

  When -s parameter is attached to the command, the result only contains the enumerated value of job status.

  Example:

  status job -j 1
  status job -j 1 -s

Extended Attributes of Create Command

For the scenario in which HDFS exchanges data with the SFTP server or RDB, MRS extends the create command attributes on the basis of the open source sqoop-shell tool, so as to specify line and field separators and conversion steps when jobs are created.

Interconnecting Sqoop1 with MRS

1. Download the open source Sqoop from http://www.apache.org/dyn/closer.lua/sqoo:p/1.4.7.
2. Save the downloaded sqoop-1.4.7.bin__hadoop-2.6.0.tar.gz package to the /opt/sqoop directory on the Master node in the MRS cluster and decompress the package.

   tar zxvf sqoop-1.4.7.bin__hadoop-2.6.0.tar.gz

3. Go to the directory where the package is decompressed and modify the configuration.

   cd /opt/sqoop/sqoop-1.4.7.bin__hadoop-2.6.0/conf

   cp sqoop-env-template.sh sqoop-env.sh

   vi sqoop-env.sh

   Add the following configurations:

   export HADOOP_COMMON_HOME=/opt/client/HDFS/hadoop

   export HADOOP_MAPRED_HOME=/opt/client/HDFS/hadoop

   export HIVE_HOME=/opt/Bigdata/MRS_1.9.X/install/FusionInsight-Hive-3.1.0/hive (Enter the actual path.)

   export HIVE_CONF_DIR=/opt/client/Hive/config

   export HCAT_HOME=/opt/client/Hive/HCatalog

4. Add the system variable SQOOP_HOME to PATH.

   vi /etc/profile

   Add the following information:

   export SQOOP_HOME=/opt/sqoop/sqoop-1.4.7.bin__hadoop-2.6.0

   export PATH=$PATH:$SQOOP_HOME/bin

5. Run the following command to copy the jline-2.12.jar file to the lib file.

   cp /opt/share/jline-2.12/jline-2.12.jar /opt/sqoop/sqoop-1.4.7.bin__hadoop-2.6.0/lib

6. Run the following command to add the following configuration to the file.

   vim $JAVA_HOME/jre/lib/security/java.policy

   permission javax.management.MBeanTrustPermission "register";

7. Run the following command to interconnect sqoop1 with MRS.

   source /etc/profile