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chetanmeh Update Gradle to 5.5 version (#4567)
Updates Gradle to 5.5 to enable work with JDK 11. Along with that it also upgrades the scoverage plugin as the older version does not work with Gradle 5.

Due to various changes in how scoverage works we needed to adapt the way how instrumented classes are included in test runs
Latest commit d9de97d Aug 12, 2019

Administrative Operations

The wskadmin utility is handy for performing various administrative operations against an OpenWhisk deployment. It allows you to create a new subject, manage their namespaces, to block a subject or delete their record entirely. It also offers a convenient way to dump the asset, activation or subject databases and query their views. This is useful for debugging local deployments. Lastly, it is a convenient way to inspect the system logs, or retrieve logs specific to a component or transaction id.

Managing Users (subjects)

The wskadmin user -h command will print the help message for working with subject records. You can create and delete a new user, list all their namespaces or keys for a specific namespace, identify a user by their key, block/unblock a subject, and list all keys that have access to a particular namespace.

Some examples:

# create a new user
$ wskadmin user create userA
<prints key>

# add user to a specific namespace
$ wskadmin user create userA -ns space1
<prints new key specific to userA and space1>

# add second user to same space
$ wskadmin user create userB -ns space1
<prints new key specific to userB and space1>

# list all users sharing a space
$ wskadmin user list space1 -a
<key for userA>   userA
<key for userB>   userB

# remove user access to a namespace
$ wskadmin user delete userB -ns space1
Namespace deleted

# get key for userA default namespaces
$ wskadmin user get userA
<prints key specific to userA default namespace>

# block a user
$ wskadmin user block userA
"userA" blocked successfully

# unblock a user
$ wskadmin user unblock userA
"userA" unblocked successfully

# delete user
$ wskadmin user delete userB
Subject deleted

The wskadmin limits commands allow you set action and trigger throttles per namespace.

# see if custom limits are set for a namespace
$ wskadmin limits get space1
No limits found, default system limits apply

# set limits on invocationsPerMinute
$ wskadmin limits set space1 --invocationsPerMinute 1
Limits successfully set for "space1"

# set limits on allowedKinds
$ wskadmin limits set space1 --allowedKinds nodejs:6 python
Limits successfully set for "space1"

# set limits to disable saving of activations in activationstore
$ wskadmin limits set space1 --storeActivations false
Limits successfully set for "space1"

Note that limits apply to a namespace and will survive even if all users that share a namespace are deleted. You must manually delete them.

$ wskadmin limits delete space1
Limits deleted

Inspecting the Databases

It is sometimes handy to inspect the database form the command line. The wskadmin db get -h command will print the help message for available utilities. You can read the entire database with wskadmin db get whisks. Add --docs to include the full documents. To list specific views, use the --view option. For example wskadmin db get whisks --view whisks.v2/actions will list the actions view only.

Inspecting System Logs

For debugging a local deployment, wskadmin syslog get will show you the controller and invoker logs available. You can use --grep to grep the logs for specific patterns, or --tid to isolate logs specific to a specific transaction in the system. It is possible to isolate logs to a specific component (e.g., controller0). By default, logs are fetched from all available components.

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