列式数据库【ClickHouse】：Install on CentOS 7 By Ansible
ClickHouse / 官方主页：
https://clickhouse.tech/
ClickHouse是俄罗斯的Yandex于2016年开源的列式存储数据库，用于在线分析处理（OLAP），能够使用SQL查询实时生成分析数据报告。
安装与部署：
通过Ansible脚本可以自动化的一键部署：ZooKeeper三节点集群 + ClickHouse三节点集群。
包含安装介质的完整脚本在百度云盘：
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链接：https://pan.baidu.com/s/1o4EbEzP-lezCyXbXIypqTQ 提取码：w38b 复制这段内容后打开百度网盘手机App，操作更方便哦 |
使用该脚本前：
- Ansible
- 运行Ansible脚本的机器需要【ssh 目标机器 date】，以将目标机器的Key记录在本地的Known_hosts文件中
- 修改相关文件
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1. inventory/hosts 需要指定要安装到哪些目标主机 2. inventory/group_vars/xxx 需要在组的变量文件中填入你的目标主机的SSH口令 3. playbooks/roles/zookeeper/vars/main.yml Role的变量文件，根据需要进行修改，其中不同配置的意义已经有详细的中文注释进行说明 4. playbooks/roles/clickhouse/vars/main.yml Role的变量文件，根据需要进行修改，其中不同配置的意义已经有详细的中文注释进行说明 |
最后，贴一个执行过程的命令行输出：
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[root@python01 ansible_code_base]# pwd /project_base/ansible_code_base [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# ls -ltr total 1629644 drwxr-xr-x 3 root root 48 Jan 21 16:40 playbooks drwxr-xr-x 4 root root 54 Jan 25 18:38 inventory -rw-r--r-- 1 root root 1668754849 Jan 27 15:34 adamhuan_ansible_base.zip [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# ls -ltr playbooks/ total 4 drwxr-xr-x 6 root root 66 Jan 25 14:26 roles -rw-r--r-- 1 root root 276 Jan 27 14:57 deploy_clickhouse.yml [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# ls -ltr playbooks/roles/ total 0 drwxr-xr-x 6 root root 60 Jan 21 14:19 linux drwxr-xr-x 6 root root 61 Jan 25 17:10 java drwxr-xr-x 7 root root 77 Jan 26 19:54 zookeeper drwxr-xr-x 7 root root 77 Jan 26 22:02 clickhouse [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# cat playbooks/deploy_clickhouse.yml - name: Pre Deploy / OS and Java hosts: clickhouse roles: - { role: linux } - { role: java } - name: Pre Deploy / ZooKeeper hosts: zookeeper roles: - { role: zookeeper } - name: Deploy / ClickHouse hosts: clickhouse roles: - { role: clickhouse } [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# cat inventory/hosts # -------------------------------------- # Ansible Inventory / Hosts / Database # -------------------------------------- # ========================== ClickHouse [clickhouse] 192.168.126.161 192.168.126.162 192.168.126.163 # ========================== ZooKeeper [zookeeper] 192.168.126.161 myid=0 192.168.126.162 myid=1 192.168.126.163 myid=2 # ========================== # ========================== # ========================== # ========================== # ========================== # ========================== # ========================== # -------------------------------------- # Finished [root@python01 ansible_code_base]# [root@python01 ansible_code_base]# ansible-playbook -i inventory/hosts playbooks/deploy_clickhouse.yml PLAY [Pre Deploy / OS and Java] ***************************************************************************************** TASK [Gathering Facts] ************************************************************************************************** ok: [192.168.126.161] ok: [192.168.126.163] ok: [192.168.126.162] TASK [linux : YUM / Config / Enable RPM keepcache] ********************************************************************** ok: [192.168.126.163] ok: [192.168.126.162] ok: [192.168.126.161] TASK [linux : YUM / Config / REPOs] ************************************************************************************* ok: [192.168.126.161] ok: [192.168.126.163] ok: [192.168.126.162] TASK [linux : YUM / Install RPM] **************************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [linux : Path and Directory / Create] ****************************************************************************** ok: [192.168.126.163] => (item=/software) ok: [192.168.126.161] => (item=/software) ok: [192.168.126.162] => (item=/software) ok: [192.168.126.161] => (item=/backup) ok: [192.168.126.163] => (item=/backup) ok: [192.168.126.162] => (item=/backup) ok: [192.168.126.161] => (item=/script) ok: [192.168.126.163] => (item=/script) ok: [192.168.126.162] => (item=/script) ok: [192.168.126.161] => (item=/temp_me) ok: [192.168.126.163] => (item=/temp_me) ok: [192.168.126.162] => (item=/temp_me) ok: [192.168.126.161] => (item=/iso) ok: [192.168.126.163] => (item=/iso) ok: [192.168.126.162] => (item=/iso) TASK [linux : Time Zone / Change to Shanghai] *************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [java : Path and Directory / Create] ******************************************************************************* ok: [192.168.126.161] => (item=/software/java) ok: [192.168.126.162] => (item=/software/java) ok: [192.168.126.163] => (item=/software/java) TASK [java : Java / Copy Install media to Host] ************************************************************************* ok: [192.168.126.161] ok: [192.168.126.163] ok: [192.168.126.162] TASK [java : Java / Create REPO] **************************************************************************************** changed: [192.168.126.161] changed: [192.168.126.162] changed: [192.168.126.163] TASK [java : Java / REPO] *********************************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [java : Java / YUM / Install RPM] ********************************************************************************** ok: [192.168.126.163] ok: [192.168.126.161] ok: [192.168.126.162] PLAY [Pre Deploy / ZooKeeper] ******************************************************************************************* TASK [Gathering Facts] ************************************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [zookeeper : Path and Directory / Create] ************************************************************************** ok: [192.168.126.161] => (item=/opt/zookeeper) ok: [192.168.126.162] => (item=/opt/zookeeper) ok: [192.168.126.163] => (item=/opt/zookeeper) ok: [192.168.126.161] => (item=/data/zookeeper/dataDir) ok: [192.168.126.162] => (item=/data/zookeeper/dataDir) ok: [192.168.126.163] => (item=/data/zookeeper/dataDir) ok: [192.168.126.161] => (item=/data/zookeeper/logDir) ok: [192.168.126.162] => (item=/data/zookeeper/logDir) ok: [192.168.126.163] => (item=/data/zookeeper/logDir) TASK [zookeeper : ZooKeeper / Install Media / Copy and UnArchive] ******************************************************* ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [zookeeper : ZooKeeper / Config File] ****************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [zookeeper : ZooKeeper / myid File] ******************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [zookeeper : ZooKeeper / Service / Start] ************************************************************************** fatal: [192.168.126.161]: FAILED! => {"changed": true, "cmd": "/opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/zkServer.sh start", "delta": "0:00:00.042934", "end": "2021-01-27 15:51:37.670431", "msg": "non-zero return code", "rc": 1, "start": "2021-01-27 15:51:37.627497", "stderr": "ZooKeeper JMX enabled by default\nUsing config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg", "stderr_lines": ["ZooKeeper JMX enabled by default", "Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg"], "stdout": "/usr/bin/java\nStarting zookeeper ... already running as process 26204.", "stdout_lines": ["/usr/bin/java", "Starting zookeeper ... already running as process 26204."]} ...ignoring fatal: [192.168.126.162]: FAILED! => {"changed": true, "cmd": "/opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/zkServer.sh start", "delta": "0:00:00.047522", "end": "2021-01-27 15:51:26.535644", "msg": "non-zero return code", "rc": 1, "start": "2021-01-27 15:51:26.488122", "stderr": "ZooKeeper JMX enabled by default\nUsing config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg", "stderr_lines": ["ZooKeeper JMX enabled by default", "Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg"], "stdout": "/usr/bin/java\nStarting zookeeper ... already running as process 13854.", "stdout_lines": ["/usr/bin/java", "Starting zookeeper ... already running as process 13854."]} ...ignoring fatal: [192.168.126.163]: FAILED! => {"changed": true, "cmd": "/opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/zkServer.sh start", "delta": "0:00:00.047523", "end": "2021-01-27 15:51:26.754399", "msg": "non-zero return code", "rc": 1, "start": "2021-01-27 15:51:26.706876", "stderr": "ZooKeeper JMX enabled by default\nUsing config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg", "stderr_lines": ["ZooKeeper JMX enabled by default", "Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg"], "stdout": "/usr/bin/java\nStarting zookeeper ... already running as process 13804.", "stdout_lines": ["/usr/bin/java", "Starting zookeeper ... already running as process 13804."]} ...ignoring TASK [zookeeper : ZooKeeper / Service Start / Result] ******************************************************************* ok: [192.168.126.161] => { "msg": "ZooKeeper / Service already running" } ok: [192.168.126.162] => { "msg": "ZooKeeper / Service already running" } ok: [192.168.126.163] => { "msg": "ZooKeeper / Service already running" } PLAY [Deploy / ClickHouse] ********************************************************************************************** TASK [Gathering Facts] ************************************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [clickhouse : Path and Directory / Create] ************************************************************************* ok: [192.168.126.161] => (item=/software/clickhouse) ok: [192.168.126.163] => (item=/software/clickhouse) ok: [192.168.126.162] => (item=/software/clickhouse) TASK [clickhouse : ClickHouse / YUM / createrepo] *********************************************************************** changed: [192.168.126.162] changed: [192.168.126.161] changed: [192.168.126.163] TASK [clickhouse : ClickHouse / REPO] *********************************************************************************** ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [clickhouse : ClickHouse / YUM / Install RPM] ********************************************************************** ok: [192.168.126.161] ok: [192.168.126.163] ok: [192.168.126.162] TASK [clickhouse : ClickHouse / User / Generate Password SHA256] ******************************************************** changed: [192.168.126.161 -> 192.168.126.161] TASK [clickhouse : ClickHouse / Password] ******************************************************************************* ok: [192.168.126.162] => { "msg": "Password / oracle" } ok: [192.168.126.161] => { "msg": "Password / oracle" } ok: [192.168.126.163] => { "msg": "Password / oracle" } TASK [clickhouse : ClickHouse / Password with SHA256] ******************************************************************* ok: [192.168.126.161] => { "msg": "Password / 9202af6ce925b26ae6b25adfff0b2705147e195fa38dd58ae6ecc58ed263751f" } ok: [192.168.126.162] => { "msg": "Password / 9202af6ce925b26ae6b25adfff0b2705147e195fa38dd58ae6ecc58ed263751f" } ok: [192.168.126.163] => { "msg": "Password / 9202af6ce925b26ae6b25adfff0b2705147e195fa38dd58ae6ecc58ed263751f" } TASK [clickhouse : ClickHouse-Server / Config File / config.xml] ******************************************************** ok: [192.168.126.162] ok: [192.168.126.161] ok: [192.168.126.163] TASK [clickhouse : ClickHouse-Server / Config File / users.xml] ********************************************************* ok: [192.168.126.161] ok: [192.168.126.162] ok: [192.168.126.163] TASK [clickhouse : ClickHouse / Service Start] ************************************************************************** changed: [192.168.126.161] => (item=clickhouse-server) changed: [192.168.126.162] => (item=clickhouse-server) changed: [192.168.126.163] => (item=clickhouse-server) PLAY RECAP ************************************************************************************************************** 192.168.126.161 : ok=29 changed=5 unreachable=0 failed=0 skipped=0 rescued=0 ignored=1 192.168.126.162 : ok=28 changed=4 unreachable=0 failed=0 skipped=0 rescued=0 ignored=1 192.168.126.163 : ok=28 changed=4 unreachable=0 failed=0 skipped=0 rescued=0 ignored=1 [root@python01 ansible_code_base]# |
最后，脚本运行完成后，ZooKeeper与ClickHouse的状态如下：
服务运行状态：
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============================ 节点一： [root@mongodb1 ~]# /opt/zookeeper/*/bin/zkServer.sh status /usr/bin/java ZooKeeper JMX enabled by default Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: follower [root@mongodb1 ~]# [root@mongodb1 ~]# systemctl status clickhouse-server ● clickhouse-server.service - ClickHouse Server (analytic DBMS for big data) Loaded: loaded (/etc/systemd/system/clickhouse-server.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2021-01-27 15:51:59 CST; 5h 26min ago Main PID: 40548 (clckhouse-watch) CGroup: /system.slice/clickhouse-server.service ├─40548 clickhouse-watchdog --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-server/cl... └─40550 /usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-se... Jan 27 15:51:59 mongodb1 systemd[1]: Started ClickHouse Server (analytic DBMS for big data). Jan 27 15:51:59 mongodb1 clickhouse-server[40548]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:51:59 mongodb1 clickhouse-server[40548]: Logging trace to /var/log/clickhouse-server/clickhouse-server.log Jan 27 15:51:59 mongodb1 clickhouse-server[40548]: Logging errors to /var/log/clickhouse-server/clickhouse-server.err.log Jan 27 15:52:00 mongodb1 clickhouse-server[40548]: Processing configuration file '/etc/clickhouse-server/users.xml'. Jan 27 15:52:00 mongodb1 clickhouse-server[40548]: Include not found: networks Jan 27 15:52:00 mongodb1 clickhouse-server[40548]: Include not found: networks Jan 27 15:52:00 mongodb1 clickhouse-server[40548]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Jan 27 15:52:02 mongodb1 clickhouse-server[40548]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:52:02 mongodb1 clickhouse-server[40548]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Hint: Some lines were ellipsized, use -l to show in full. [root@mongodb1 ~]# [root@mongodb1 ~]# netstat -tupln | grep clickhouse tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 40550/clickhouse-se tcp 0 0 127.0.0.1:9004 0.0.0.0:* LISTEN 40550/clickhouse-se tcp 0 0 127.0.0.1:9009 0.0.0.0:* LISTEN 40550/clickhouse-se tcp 0 0 127.0.0.1:8123 0.0.0.0:* LISTEN 40550/clickhouse-se [root@mongodb1 ~]# [root@mongodb1 ~]# netstat -tupln | grep java tcp6 0 0 192.168.126.161:3888 :::* LISTEN 26204/java tcp6 0 0 :::8080 :::* LISTEN 26204/java tcp6 0 0 :::44867 :::* LISTEN 26204/java tcp6 0 0 :::2181 :::* LISTEN 26204/java [root@mongodb1 ~]# ============================ 节点二： [root@mongodb2 ~]# /opt/zookeeper/*/bin/zkServer.sh status /usr/bin/java ZooKeeper JMX enabled by default Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: follower [root@mongodb2 ~]# [root@mongodb2 ~]# systemctl status clickhouse-server ● clickhouse-server.service - ClickHouse Server (analytic DBMS for big data) Loaded: loaded (/etc/systemd/system/clickhouse-server.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2021-01-27 15:51:48 CST; 5h 26min ago Main PID: 28246 (clckhouse-watch) Tasks: 51 CGroup: /system.slice/clickhouse-server.service ├─28246 clickhouse-watchdog --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-server/cl... └─28254 /usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-se... Jan 27 15:51:48 mongodb2 systemd[1]: Started ClickHouse Server (analytic DBMS for big data). Jan 27 15:51:48 mongodb2 clickhouse-server[28246]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:51:48 mongodb2 clickhouse-server[28246]: Logging trace to /var/log/clickhouse-server/clickhouse-server.log Jan 27 15:51:48 mongodb2 clickhouse-server[28246]: Logging errors to /var/log/clickhouse-server/clickhouse-server.err.log Jan 27 15:51:49 mongodb2 clickhouse-server[28246]: Processing configuration file '/etc/clickhouse-server/users.xml'. Jan 27 15:51:49 mongodb2 clickhouse-server[28246]: Include not found: networks Jan 27 15:51:49 mongodb2 clickhouse-server[28246]: Include not found: networks Jan 27 15:51:49 mongodb2 clickhouse-server[28246]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Jan 27 15:51:51 mongodb2 clickhouse-server[28246]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:51:51 mongodb2 clickhouse-server[28246]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Hint: Some lines were ellipsized, use -l to show in full. [root@mongodb2 ~]# [root@mongodb2 ~]# netstat -tupln | grep clickhouse tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 28254/clickhouse-se tcp 0 0 127.0.0.1:9004 0.0.0.0:* LISTEN 28254/clickhouse-se tcp 0 0 127.0.0.1:9009 0.0.0.0:* LISTEN 28254/clickhouse-se tcp 0 0 127.0.0.1:8123 0.0.0.0:* LISTEN 28254/clickhouse-se [root@mongodb2 ~]# [root@mongodb2 ~]# netstat -tupln | grep java tcp6 0 0 192.168.126.162:3888 :::* LISTEN 13854/java tcp6 0 0 :::8080 :::* LISTEN 13854/java tcp6 0 0 :::41978 :::* LISTEN 13854/java tcp6 0 0 :::2181 :::* LISTEN 13854/java [root@mongodb2 ~]# ============================ 节点三： [root@mongodb3 ~]# /opt/zookeeper/*/bin/zkServer.sh status /usr/bin/java ZooKeeper JMX enabled by default Using config: /opt/zookeeper/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: leader [root@mongodb3 ~]# [root@mongodb3 ~]# systemctl status clickhouse-server ● clickhouse-server.service - ClickHouse Server (analytic DBMS for big data) Loaded: loaded (/etc/systemd/system/clickhouse-server.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2021-01-27 15:51:48 CST; 5h 26min ago Main PID: 28203 (clckhouse-watch) Tasks: 51 CGroup: /system.slice/clickhouse-server.service ├─28203 clickhouse-watchdog --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-server/cl... └─28210 /usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-se... Jan 27 15:51:48 mongodb3 systemd[1]: Started ClickHouse Server (analytic DBMS for big data). Jan 27 15:51:48 mongodb3 clickhouse-server[28203]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:51:48 mongodb3 clickhouse-server[28203]: Logging trace to /var/log/clickhouse-server/clickhouse-server.log Jan 27 15:51:48 mongodb3 clickhouse-server[28203]: Logging errors to /var/log/clickhouse-server/clickhouse-server.err.log Jan 27 15:51:49 mongodb3 clickhouse-server[28203]: Processing configuration file '/etc/clickhouse-server/users.xml'. Jan 27 15:51:49 mongodb3 clickhouse-server[28203]: Include not found: networks Jan 27 15:51:49 mongodb3 clickhouse-server[28203]: Include not found: networks Jan 27 15:51:49 mongodb3 clickhouse-server[28203]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Jan 27 15:51:51 mongodb3 clickhouse-server[28203]: Processing configuration file '/etc/clickhouse-server/config.xml'. Jan 27 15:51:51 mongodb3 clickhouse-server[28203]: Saved preprocessed configuration to '/data/clickhouse/dataDir/p...ml'. Hint: Some lines were ellipsized, use -l to show in full. [root@mongodb3 ~]# [root@mongodb3 ~]# netstat -tupln | grep clickhouse tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 28210/clickhouse-se tcp 0 0 127.0.0.1:9004 0.0.0.0:* LISTEN 28210/clickhouse-se tcp 0 0 127.0.0.1:9009 0.0.0.0:* LISTEN 28210/clickhouse-se tcp 0 0 127.0.0.1:8123 0.0.0.0:* LISTEN 28210/clickhouse-se [root@mongodb3 ~]# [root@mongodb3 ~]# netstat -tupln | grep java tcp6 0 0 192.168.126.163:2888 :::* LISTEN 13804/java tcp6 0 0 192.168.126.163:3888 :::* LISTEN 13804/java tcp6 0 0 :::8080 :::* LISTEN 13804/java tcp6 0 0 :::36474 :::* LISTEN 13804/java tcp6 0 0 :::2181 :::* LISTEN 13804/java [root@mongodb3 ~]# |
访问ClickHouse：
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[root@mongodb1 ~]# clickhouse-client --user default --password ClickHouse client version 21.1.2.15 (official build). Password for user (default): Connecting to localhost:9000 as user default. Connected to ClickHouse server version 21.1.2 revision 54443. mongodb1 :) select * from system.clusters; SELECT * FROM system.clusters Query id: 6590007e-2134-41da-9707-9dd58bbd959a ┌─cluster──────────────┬─shard_num─┬─shard_weight─┬─replica_num─┬─host_name───────┬─host_address────┬─port─┬─is_local─┬─user────┬─default_database─┬─errors_count─┬─estimated_recovery_time─┐ │ clickhouse_cluster_1 │ 1 │ 1 │ 1 │ 192.168.126.161 │ 192.168.126.161 │ 9000 │ 1 │ default │ │ 0 │ 0 │ │ clickhouse_cluster_1 │ 2 │ 1 │ 1 │ 192.168.126.162 │ 192.168.126.162 │ 9000 │ 0 │ default │ │ 0 │ 0 │ │ clickhouse_cluster_1 │ 3 │ 1 │ 1 │ 192.168.126.163 │ 192.168.126.163 │ 9000 │ 0 │ default │ │ 0 │ 0 │ └──────────────────────┴───────────┴──────────────┴─────────────┴─────────────────┴─────────────────┴──────┴──────────┴─────────┴──────────────────┴──────────────┴─────────────────────────┘ 3 rows in set. Elapsed: 0.014 sec. mongodb1 :) mongodb1 :) show databases; SHOW DATABASES Query id: 537f8cfb-5488-4892-8e41-dd98197543ac ┌─name────┐ │ default │ │ system │ └─────────┘ 2 rows in set. Elapsed: 0.005 sec. mongodb1 :) mongodb1 :) select database(); SELECT database() Query id: a29b1cbf-8e51-4830-b505-df211ce1c395 ┌─database()─┐ │ default │ └────────────┘ 1 rows in set. Elapsed: 0.006 sec. mongodb1 :) mongodb1 :) exit Bye. [root@mongodb1 ~]# |
总结的很好，文档写的很不错。