Given an instance ID, executes `cqlsh` on that instance. Uses the the `cqlshrc` file located in the instance's configuration directory.

$ c-cqlsh a

Connected to services-test at 10.64.0.202:9042.

[cqlsh 5.0.1 | Cassandra 2.2.6 | CQL spec 3.3.1 | Native protocol v4]

Use HELP for help.

cassandra@cqlsh>

In a WMF multi-instance environment, executes nodetool on a randomly chosen instance (any instance).

$ c-any-nt status -r

...

In a WMF multi-instance environment, iteratively execute nodetool on all local Cassandra instances.

$ c-foreach-nt version

a: ReleaseVersion: 2.2.6

b: ReleaseVersion: 2.2.6

c-foreach-restart [-h] [-r RETRIES] [-d DELAY] [--execute-post-shutdown CMD]

Cassandra instance restarter.

optional arguments:

-h, --help show this help message and exit

-r RETRIES, --retries RETRIES

Maximum number of times to check if service is up.

-d DELAY, --delay DELAY

Number seconds between connection attempts, in

seconds.

--execute-post-shutdown CMD

Command to execute after Cassandra has been shutdown,

and before it is started back up.

In a WMF multi-instance environment, iteratively restart instances.

Each instance is drained prior to being restarted. After each restart, the process blocks

until the CQL port is listening.

Commands specified by `--execute-post-shutdown` can include the `{id}` template which will

be substituted with the ID of the instance being restarted.

$ sudo c-foreach-restart --execute-post-shutdown="echo '{id} is a teapot, short and stout'"

...

List the IDs of the locally configured instance IDs.

$ c-ls

a

b

c

streams [-h] [-nt CMD]

Cassandra streams monitor

optional arguments:

-h, --help show this help message and exit

-nt CMD, --nodetool CMD

Nodetool command to use

Realtime console monitoring of streaming operations.

$ streams -nt nodetool-b

uyaml [-h] yaml path

YAML parser

positional arguments:

yaml YAML file to parse

path Path to parse from file

optional arguments:

-h, --help show this help message and exit

Query attributes from a YAML file.

$ uyaml /etc/cassandra-instances.d/restbase1007-a.yaml /jmx_port

7189

$ for i in `c-ls`; do uyaml /etc/cassandra-instances.d/restbase1007-$i.yaml /jmx_port; done

7189

7190

7191