yb-docker-ctl
The yb-docker-ctl utility provides a simple command line interface (CLI), or shell, for administering a local Docker-based cluster for development and learning. It manages the YB-Master and YB-TServer containers to perform the necessary administration.
Download
$ mkdir ~/yugabyte && cd ~/yugabyte
$ wget https://raw.githubusercontent.com/yugabyte/yugabyte-db/master/bin/yb-docker-ctl && chmod +x yb-docker-ctl
Online help
Run yb-docker-ctl --help to display the online help.
$ ./yb-docker-ctl -h
Syntax
yb-docker-ctl [ command ] [ arguments ]
Commands
create
Creates a local YugabyteDB cluster.
add_node
Adds a new local YugabyteDB cluster node.
status
Displays the current status of the local YugabyteDB cluster.
destroy
Destroys the local YugabyteDB cluster.
stop_node
Stops the specified local YugabyteDB cluster node.
start_node
Starts the specified local YugabyteDB cluster node.
stop
Stops the local YugabyteDB cluster so that it can be started later.
start
Starts the local YugabyteDB cluster, if it already exists.
remove_node
Stops the specified local YugabyteDB cluster node.
Optional arguments
--help, -h
Displays the online help and then exits.
--tag
Use with create and add_node commands to specify a specific Docker image tag (version). If not included, then latest Docker image is used.
Create a cluster
Use the yb-docker-ctl create command to create a local Docker-based cluster for development and learning.
The number of nodes created when you use the yb-docker-ctl create command is always equal to the replication factor (RF), ensuring that all of the replicas for a given tablet can be placed on different nodes. With the add_node and remove_node commands, the size of the cluster can thereafter be expanded or shrunk as needed.
Specify a docker image tag
By default, the create and add_node commands pull the latest Docker Hub yugabytedb/yugabyte image to create clusters or add nodes.
To pull an earlier Docker image tag (version), add the optional --tag <tag-id> parameter to use an earlier release.
In the following example, a 1-node YugabyteDB cluster is created using the earlier v1.3.2.1 release that has a tag of 1.3.2.1-b2.
$yb-docker-ctl create --tag 1.3.2.1-b2
To get the correct tag value, see the Docker Hub listing of tags for yugabytedb/yugabyte.
Create a 1-node local cluster with replication factor of 1
To create a 1-node local YugabyteDB cluster for development and learning, run the default yb-docker-ctl command. By default, this creates a 1-node cluster with a replication factor (RF) of 1. Note that the yb-docker-ctl create command pulls the latest yugabytedb/yugabyte image at the outset, in case the image has not yet downloaded or is not the latest version.
$ ./yb-docker-ctl create
Create a 3-node local cluster with replication factor of 3
When you create a 3-node local Docker-based cluster using the yb-docker-ctl create command, each of the initial nodes run a yb-tserver process and a yb-master process. Note that the number of YB-Masters in a cluster has to equal to the replication factor (RF) for the cluster to be considered as operating normally and the number of YB-TServers is equal to be the number of nodes.
To create a 3-node local Docker-based cluster for development and learning, run the following yb-docker-ctl command.
$ ./yb-docker-ctl create --rf 3
docker run --name yb-master-n1 --privileged -p 7000:7000 --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-master --fs_data_dirs=/mnt/disk0,/mnt/disk1 --master_addresses=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-master-n1:7100
Adding node yb-master-n1
docker run --name yb-master-n2 --privileged --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-master --fs_data_dirs=/mnt/disk0,/mnt/disk1 --master_addresses=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-master-n2:7100
Adding node yb-master-n2
docker run --name yb-master-n3 --privileged --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-master --fs_data_dirs=/mnt/disk0,/mnt/disk1 --master_addresses=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-master-n3:7100
Adding node yb-master-n3
docker run --name yb-tserver-n1 --privileged -p 9000:9000 -p 9042:9042 -p 6379:6379 --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-tserver --fs_data_dirs=/mnt/disk0,/mnt/disk1 --tserver_master_addrs=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-tserver-n1:9100
Adding node yb-tserver-n1
docker run --name yb-tserver-n2 --privileged --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-tserver --fs_data_dirs=/mnt/disk0,/mnt/disk1 --tserver_master_addrs=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-tserver-n2:9100
Adding node yb-tserver-n2
docker run --name yb-tserver-n3 --privileged --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-tserver --fs_data_dirs=/mnt/disk0,/mnt/disk1 --tserver_master_addrs=yb-master-n1:7100,yb-master-n2:7100,yb-master-n3:7100 --rpc_bind_addresses=yb-tserver-n3:9100
Adding node yb-tserver-n3
PID Type Node URL Status Started At
11818 tserver yb-tserver-n3 http://172.19.0.7:9000 Running 2017-11-28T23:33:00.369124907Z
11632 tserver yb-tserver-n2 http://172.19.0.6:9000 Running 2017-11-28T23:32:59.874963849Z
11535 tserver yb-tserver-n1 http://172.19.0.5:9000 Running 2017-11-28T23:32:59.444064946Z
11350 master yb-master-n3 http://172.19.0.4:9000 Running 2017-11-28T23:32:58.899308826Z
11231 master yb-master-n2 http://172.19.0.3:9000 Running 2017-11-28T23:32:58.403788411Z
11133 master yb-master-n1 http://172.19.0.2:9000 Running 2017-11-28T23:32:57.905097927Z
Create a 5-node local cluster with replication factor of 5
$ ./yb-docker-ctl create --rf 5
Check cluster status
Get the status of your local cluster, including the URLs for the Admin UI for each YB-Master and YB-TServer.
$ ./yb-docker-ctl status
PID Type Node URL Status Started At
11818 tserver yb-tserver-n3 http://172.19.0.7:9000 Running 2017-11-28T23:33:00.369124907Z
11632 tserver yb-tserver-n2 http://172.19.0.6:9000 Running 2017-11-28T23:32:59.874963849Z
11535 tserver yb-tserver-n1 http://172.19.0.5:9000 Running 2017-11-28T23:32:59.444064946Z
11350 master yb-master-n3 http://172.19.0.4:9000 Running 2017-11-28T23:32:58.899308826Z
11231 master yb-master-n2 http://172.19.0.3:9000 Running 2017-11-28T23:32:58.403788411Z
11133 master yb-master-n1 http://172.19.0.2:9000 Running 2017-11-28T23:32:57.905097927Z
Add a node
Add a new node to the cluster. This will start a new yb-tserver process and give it a new node_id for tracking purposes.
$ ./yb-docker-ctl add_node
docker run --name yb-tserver-n4 --net yb-net --detach yugabytedb/yugabyte:latest /home/yugabyte/yb-tserver --fs_data_dirs=/mnt/disk0,/mnt/disk1 --tserver_master_addrs=04:7100,04:7100,04:7100 --rpc_bind_addresses=yb-tserver-n4:9100
Adding node yb-tserver-n4
Remove a node
Remove a node from the cluster by executing the following command. The command takes the node_id of the node to be removed as input.
Help
$ ./yb-docker-ctl remove_node --help
usage: yb-docker-ctl remove_node [-h] node
positional arguments:
node_id Index of the node to remove
optional arguments:
-h, --help show this help message and exit
Example
$ ./yb-docker-ctl remove_node 3
Stopping node :yb-tserver-n3
Destroy cluster
The yb-docker-ctl destroy command below destroys the local cluster, including deletion of the data directories.
$ ./yb-docker-ctl destroy
Upgrade container image
The following docker pull command below upgrades the Docker image of YugabyteDB to the latest version.
$ docker pull yugabytedb/yugabyte