gs_preinstall过程分析

预安装的命令：

/opt/soft/mogdb/script/gs_preinstall -U moguser -G mogdbgrp -X /opt/soft/mogdb/clusterconfig.xml

从/var/log/mogdb/omm/om的路径里面查看日志文件gs_local-2022-01-28_161218.log
分为一下几个步骤：
1 set_tool_env
包括清除一些omm用户下.bashrc文件里面的mogdb所需的环境变量，例如GPHOME
PATH,LD_LIBRARY_PATH,PYTHONPATH,GAUSSHOME,PATH,LD_LIBRARY_PATH,S3_CLIENT_CRT_FILE,GAUSS_VERSION,PGHOST,GAUSSLOG,GAUSS_ENV,GS_CLUSTER_NAME,上面存在2个path变量，分别为

• export PATH=$ GPHOME/script/gspylib/pssh/bin:$ GPHOME/script:$PATH
• exportPATH=$ GAUSSHOME/bin:$PATH，可以从后面所跟的路径判断出区别。
  

2 check_os_user，检查os的的用户和组，比如我使用的是mogdbuser和mogdbgrp

3 prepare_user_sshd_service
使用om工具安装的时候，创建ssh互信

4 change_tool_env
针对第一次预安装失败之后，再次进行预安装，该步骤是对上一次预安装的环境变量的修改和纠正

5 check_os_software
检查bzip2 以及bzip2的位置

6 check_os_Version
主要作用是检查操作系统的版本，支持主流的linux操作系统，centos，redhat。

7 create_cluster_paths

• 创建集群路径，创建日志路径，检查mogdb的日志目录，创建mogdb的app的安装路径。
• Command to check if we have write permission for upper path
• Creating temporary path
• Creating data path
  

8 gs_checkos and gaussdb_localcheck and LocalCheckOS
使用sysctl 命令设置参数的值，比如：
net.ipv4.tcp_max_tw_buckets
net.ipv4.tcp_tw_reuse
net.ipv4.tcp_tw_recycle
net.ipv4.tcp_keepalive_time
net.ipv4.tcp_keepalive_intvl
net.ipv4.tcp_retries2
net.ipv4.ip_local_reserved_ports
net.core.wmem_max
net.core.rmem_max
net.core.wmem_default
net.core.rmem_default
kernel.sem
net.ipv4.tcp_rmem
net.ipv4.tcp_wmem
vm.min_free_kbytes
net.core.netdev_max_backlog
net.ipv4.tcp_max_syn_backlog
net.core.somaxconn
kernel.shmall
kernel.shmmax

9 set_user_env
设置user的概要文件，即profile文件

10 set_library
设置omm的库文件，Setting Library

10 set_cgroup
设置和管理资源的分配、限制

11 fix_server_package_owner
修改/opt/soft/mogdb的mode，以及/mogdb/mogdb/tools和/opt/soft/mogdb/clusterconfig.xml的属主和属组，以及文件权限

12 set_finish_flag

• Checking core_pattern
• Checking RemoveIpc
• Deleting user’s environmental variable
• Seting user’s environmental variable
• set daily alarm
• Changing the owner of Gausslog
• Changing the owner of GPHOME
• Changing the owner of preinstall log path
• The command of check permission is
• Setting finish flag
  

执行mogdb安装的命令
su - omm
/opt/soft/mogdb/script/gs_install -X /opt/soft/mogdb/clusterconfig.xml --gsinit-parameter="–locale=en_US.UTF-8" --gsinit-parameter="–encoding=UTF-8"

在gs_install 安装的阶段包括一下几个步骤
1 CheckInstall

• Using installation program path: /mogdb/mogdb/app_01071903.
• Using set configuration file parameters: [].
• Checking old installation.
• Checking SHA256.
• Checking kernel parameters.
• Checking directory.
• Database program installation path available size 95150M.
• Get the install path /mogdb/mogdb/app_01071903 user info.
• Checking instance port and IP.
• Checking preinstall enviroment value.

2 Install

• Using omm:dbgrp to install database.
• Using installation program path : /mogdb/mogdb/app
• Created symbolic link to $GAUSSHOME with commitid.
• Get the install path /mogdb/mogdb/app_01071903 user info.
• Decompressing bin file.
• Modifying Alarm configuration.
• Modifying user’s environmental variable $GAUSS_ENV.
• Successfully modified user’s environmental variable $GAUSS_ENV.
• Fixing file permission.
• Set Cgroup config file to appPath.
• set cgroup at install step cmd: cp /mogdb/mogdb/tools/omm/etc/*
  /mogdb/mogdb/app/etc
• Successfully Set Cgroup

3 CleanInstance

• Get the install path /mogdb/mogdb/app_01071903 user info.
• Cleaning instance.
• Deleting instances.
• Cleaning instance.
• /mogdb/data/db1/pg_tblspc does not exists.
• Deleting instances directories.
• Successfully cleaned instances.
• Deleting socket files.
• Successfully cleaned socket files.
• Successfully cleaned instances.
• Successfully cleaned instance information.
• Checking parameters for configuring DNs.
• Instance information on local node

4 CheckNodeEnv

• Checking MogDB log directory[/var/log/mogdb/omm].
• Making user_profile_dir directory[/var/log/mogdb/omm/gs_profile] for database node user.
• Making user_pg_log_dir directory[/var/log/mogdb/omm/pg_log] for database node user.
• Making user_pg_audit_dir directory[/var/log/mogdb/omm/pg_audit] for database node user.
• Making user_bin_dir directory[/var/log/mogdb/omm/bin] for database node user.
• Making user_pg_log_dn_6001_dir directory[/var/log/mogdb/omm/pg_log/dn_6001] for database node user.
• Making user_pg_audit_dn_6001_dir directory[/var/log/mogdb/omm/pg_audit/dn_6001] for database node user.
• Command to find directory in directory[/var/log/mogdb/omm]
• Command to find file in directory[/var/log/mogdb/omm]
• Command to change the obs log setting.
• Checking directory [/mogdb/mogdb/tools/omm_mppdb].
• Checking database node configuration.
• Checking directory [/mogdb/data/db1].
• Checked the configuration file on node[mogdb-001] successfully.

5 initDbNode

• Get the install path /mogdb/mogdb/app_01071903 user info.
• Initializing instance.
• Command for initializing database node instance: /mogdb/mogdb/app/bin/gs_initdb --locale=C -D /mogdb/data/db1 --nodename=dn_6001 --locale=en_US.UTF-8 --encoding=UTF-8 -C /mogdb/mogdb/app/bin
• Successfully init instance information.

6 ConfigInstance

• Get the install path /mogdb/mogdb/app_01071903 user info
• Checking parameters for configuration database node.
• Modifying Alarm configuration.
• Modifying database node configuration.
• Check if tmp_guc file exists.
• set dynamic guc parameters for database node instances.

7 ConfigHba

• Get the install path /mogdb/mogdb/app_01071903 user info.
• Successfully configured all instances on node[mogdb-001].

8 Install

• Get the install path /mogdb/mogdb/app_01071903 user info.
• start cmd = /mogdb/mogdb/app/bin/gs_ctl start -D /mogdb/data/db1 -t 300
• gs_ctl started,datadir is /mogdb/data/db1

9 gs_ctl

• [gs_ctl]: waiting for server to start…

• 0 LOG: [Alarm Module]can not read GAUSS_WARNING_TYPE env.

• 0 LOG: [Alarm Module]Host Name: mogdb-001

• 0 LOG: [Alarm Module]Host IP: 172.24.17.217

• 0 LOG: [Alarm Module]Cluster Name: dbCluster

• 0 LOG: bbox_dump_path is set to /mogdb/mogdb/corefile/

• 2022-02-06 16:18:50.103 61ff846a.1 [unknown] 140112815449664 [unknown] 0
  dn_6001 DB010 0 [REDO] LOG: Recovery parallelism, cpu count = 2, max = 4,
  actual = 2

• 2022-02-06 16:18:50.103 61ff846a.1 [unknown] 140112815449664 [unknown] 0
  dn_6001 DB010 0 [REDO] LOG: ConfigRecoveryParallelism,
  true_max_recovery_parallelism:4, max_recovery_parallelism:4

• gaussdb.state does not exist, and skipt setting since it is optional.2022-

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• [gs_ctl] done

• [gs_ctl]: server started (/mogdb/data/db1)