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configuration 4.1 Service Management Role CLI Rework

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Steve Jones edited this page Sep 7, 2017 · 2 revisions

Overview

This feature is about adding support for recent architectural changes to the admin tools in addition to improving the admin tools' interfaces.

Goals

Non-goals

  • Fundamentally changing the way service management works
  • Fundamentally changing the way credential management works

Tasks

All new command and operation names are illustrative and not final. P1 indicates mandatory tasks, P2 indicates high-priority tasks that do not necessarily block the feature, and P3 refers to low-priority tasks.

Client tools

  • P1 : Replaceeuca-get-credentials with a wholly-client-side equivalent.

    • This decouples client configuration from the system's implementation.
    • This makes generating configurations for diverse clients simpler by enabling automation.
    • This requires a workingeuca-describe-endpoints command that works for regular users.

  • P1 : Port the existing admin tools to the requestbuilder framework.

    • This enables use of STS credentials, and thus part of the administrative role workflow.

    • List of commands needed to maintain the current level of functionality:

    • euadmin-initialize-region

    • Initializes a new cloud

    • euadmin-get-admin-creds

    • Obtains super-admin credentials for use during setup

    • euadmin-describe-service-types

    • euadmin-register-service -t TYPE HOST_OR_URL

    • euadmin-describe-services --by-host

    • euadmin-describe-services --by-type

    • euadmin-describe-services --by-endpoint

    • euadmin-deregister-service SERVICE

    • euadmin-deregister-service GROUP

    • euadmin-migrate-instances --source SERVICE

    • euprop -a

    • euprop PROPERTY ...

    • euprop PROPERTY = VALUE ...

    • This interface adds future-proofing for transactional property updates.

    • euprop PROPERTY =@ FILE ...

    • This interface is needed to support commands like euadmin-configure-vmware

    • euprop --reset PROPERTY ...

    • This reduces confusion by reducing the number of command line utilities in the admin tool suite.

    • This reduces confusion by putting admin tool executables in different namespaces from euca2ools.

    • This eliminates awkward UIs from commands such aseuca_conf andeuca-modify-property.

  • P1 : Implement euare-assumerole

  • P1 : Add AWS signature version 4 support to requestbuilder

  • P3 : Implement single-command role assumption (e.g.--as-role command line option)

  • P3 : Implement automatic instance profile credential use.

Cloud controller

  • P1 : Cloud controllers shall provide a well-defined interface for a client tool with local access to obtain super-admin query credentials (not a zip file).

    • Query credentials are all that is necessary to obtain everything that the zip file contains.

  • P1 : Ensure DescribeAvailableServiceTypes responses include service group types so it is possible for infrastructure administrators to know what to supply to euadmin-register-service when registering the user-facing service group.

  • P1 : Make the functionality of DescribeServices accessible to all users, including anonymous users.

    • Not all users may have access to a CLC, which is currently the only source of correct service information.
    • This makes it possible to implement part of a client-side replacement foreuca-get-credentials.

  • P1 : Ensurecloud-cert.pem is accessible to all users via a web service call.

  • P2 : When DNS delegation is enabled, lists of services shall contain generic, DNS-based endpoints that refer to any active instance of each service. (e.g.compute.mycloud.example.com)

    • This is necessary for a client-side replacement foreuca-get-credentials to generate configuration files.

  • P2 : Expose information about service groups and service group membership alongside service information via DescribeServices or a new operation, such as DescribeServiceGroupMembers.

    • This makes it possible for infrastructure administrators to clearly view which services' states should change in unison.
    • This makes it possible for infrastructure administrators to learn how to affect all members of a service group at once with operations such asDeregisterService andModifyService.

  • P3 : Decompose RegisterService,DeregisterService,ModifyService, andDescribeServices into separate operations for services and service groups.

    • An example of such a decomposition is the following set of operations:

    • DescribeServiceTypes / DescribeServiceGroupTypes

    • RegisterServiceInstance /RegisterServiceGroup

    • DeregisterServiceInstance / DeregisterServiceGroup

    • ModifyServiceInstance / ModifyServiceGroup

    • DescribeServiceInstances /DescribeServiceGroups

    • AddServiceInstanceToGroup

    • RemoveServiceInstanceFromGroup

    • DescribeServiceGroupMembers

    • This composes the information available fromDescribeServiceInstances andDescribeGroups.

    • Most of the existing operations that this decomposition splits up are essentially "if-else" pairs that can be written in terms of two new methods.

    • This makes it possible to present services and service groups to infrastructure administrators separately.

    • If hiding the differences between services and service groups from end users is reasonable then client tools can do so.

Questions

  • Should super-admin credentials expire?

Issues

JIRA (eucalyptus.atlassian.net)

tag:confluence tag:rls-4.1 tag:configuration

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