scripts: add convenience script for creating table

[neverchanje]

What problem does this PR solve?

Add convenience script for creating tables. Users can specify the table owners and their department, the write throttling, as well as the required attributes like 'partition count' and 'table name'.

If the table is created before, users can still reset the table's environments.

This script is at an early stage.

What is changed and how it works?

I use python for this script, reusing the utilities provided by py_utils/lib.py.

Check List

Tests

• Manual test (add detailed scripts or steps below)

➜  pegasus git:(create) ✗ ./scripts/create_table.py -t ai_user_info \
                          -d "云平台部-存储平台-KV系统组" \
                          -u "wutao1&qinzuoyan" \
                          -c c3tst-dup2 \
                          -w "2000*delay*100" \
                          -p 16
Confirm to create table:
{
    "cluster": "c3tst-dup2", 
    "depart": "云平台部-存储平台-KV系统组", 
    "partition_count": 16, 
    "table": "ai_user_info", 
    "user": "wutao1&qinzuoyan", 
    "write_throttling": "2000*delay*100"
}
 [y/N]: y
Creating table ai_user_info...
New value of business.info=depart=云平台部-存储平台-KV系统组,user=wutao1&qinzuoyan
New value of replica.write_throttling=2000*delay*100

➜  pegasus git:(create) ✗ ./scripts/create_table.py -t ai_user_info \
                          -d "云平台部-存储平台-KV系统组" \
                          -u "wutao1&qinzuoyan" \
                          -c c3tst-dup2 \
                          -w "2000*delay*100" \
                          -p 16
Confirm to create table:
{
    "cluster": "c3tst-dup2", 
    "depart": "云平台部-存储平台-KV系统组", 
    "partition_count": 16, 
    "table": "ai_user_info", 
    "user": "wutao1&qinzuoyan", 
    "write_throttling": "2000*delay*100"
}
 [y/N]: y
Success: table "ai_user_info" exists
New value of business.info=depart=云平台部-存储平台-KV系统组,user=wutao1&qinzuoyan
Old value of business.info=depart=云平台部-存储平台-KV系统组,user=wutao1&qinzuoyan
Success: business.info keeps unchanged
New value of replica.write_throttling=2000*delay*100
Old value of replica.write_throttling=2000*delay*100
Success: replica.write_throttling keeps unchanged

➜  pegasus git:(create) ✗ ./scripts/create_table.py --help
Usage: create_table.py [OPTIONS]

Options:
  -t, --table TEXT               Name of the table you want to create.
                                 [required]
  -d, --depart TEXT              Department of the table owner. If there are
                                 more than one levels of department, use '-'
                                 to concatenate them.  [required]
  -u, --user TEXT                The table owner. If there are more than one
                                 owners, use '&' to concatenate them.
                                 [required]
  -c, --cluster TEXT             The cluster name. Where you want to place the
                                 table.  [required]
  -p, --partition_count INTEGER  The partition count of the table. Empty means
                                 no create.
  -w, --write_throttling TEXT    {delay_qps_threshold}*delay*{delay_ms},{rejec
                                 t_qps_threshold}*reject*{delay_ms_before_reje
                                 ct}
  --help                         Show this message and exit.

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation
• Need to be included in the release note

[acelyc111]

python脚本的一些警告处理下, IDE一般都能提示出来

[acelyc111]

参数顺序可以调整下, 从广到细, 从required到optional