"Fossies" - the Fresh Open Source Software Archive

Member "monasca-api-4.0.0/docs/java.md" (13 May 2020, 5966 Bytes) of package /linux/misc/openstack/monasca-api-4.0.0.tar.gz:


As a special service "Fossies" has tried to format the requested source page into HTML format (assuming markdown format). Alternatively you can here view or download the uninterpreted source code file. A member file download can also be achieved by clicking within a package contents listing on the according byte size field.

WARNING DEPRECATED

The Java implementation of Monasca API is DEPRECATED and will be removed in a future release

Java Build

Requires monasca-common. First clone this repository and then do mvn install. Then return to monasca-api and:

$ cd java
$ mvn clean package

StackForge Java Build

There is a pom.xml in the base directory that should only be used for the StackForge build. The StackForge build is a rather strange build because of the limitations of the current StackForge java jobs and infrastructure. We have found that the API runs faster if built with maven 3 but the StackForge nodes only have maven 2. This build checks the version of maven and if not maven 3, it downloads a version of maven 3 and uses it. This build depends on jars that are from monasca-common. That StrackForge build uploads the completed jars to http://tarballs.openstack.org/ci/monasca-common, but they are just regular jars, and not in a maven repository and sometimes zuul takes a long time to do the upload. Hence, the first thing the maven build from the base project does is invoke build_common.sh in the common directory. This script clones monasca-common and then invokes maven 3 to build monasca-common in the common directory and install the jars in the local maven repository.

Since this is all rather complex, that part of the build only works on StackForge so follow the simple instruction above if you are building your own monasca-api.

Currently this build is executed on the bare-precise nodes in StackForge and they only have maven 2. So, this build must be kept compatible with Maven 2. If another monasca-common jar is added as a dependency to /java/pom.xml, it must also be added to download/download.sh.

Combining monasca-common, monasca-thresh, monasca-api and monasca-persister into one build would vastly simplify the builds but that is a future task.`

Usage

$ java -jar target/monasca-api.jar server config-file.yml

Keystone Configuration

For secure operation of the Monasca API, the API must be configured to use Keystone in the configuration file under the middleware section. Monasca only works with a Keystone v3 server. The important parts of the configuration are explained below:

Keystone Roles

The Monasca API has two levels of access: * Full access - user can read/write metrics and Alarm Definitions and Alarms * Agent access - user can only write metrics

The reason for the “Agent access” level is because the Monasca Agent must be configured to use a Keystone user. Since the user and password are configured on all of the systems running the Monasca Agent, this user is most in danger of being compromised. If this user is limited to only writing metrics, then the damage can be limited.

To configure the user to have full access, the user must have a role that is listed in defaultAuthorizedRoles. To configure a user to have only “Agent access”, the user must have a role in agentAuthorizedRoles and none of the roles in defaultAuthorizedRoles.

If you want to give users the ability to only view data, configure one or more roles in the readOnlyAuthorizedRoles list.

Design Overview

Architectural layers

Requests flow through the following architectural layers from top to bottom: