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Chapter 1. The resource-optimization service for public-cloud systems

The Red Hat Insights for Red Hat Enterprise Linux resource optimization service enables RHEL customers to assess and monitor their public RHEL cloud usage and optimization. The service shows metrics for the following:

  • CPU
  • Memory
  • Disk-usage

It analyzes those metrics and compares them to resource limits recommended by your public cloud provider. Leveraging data from the past day, the resource optimization service considers each resource parameter in several distinct ways and returns actionable data. This data enables better resource allocation and helps you to save money on your public cloud investment.

Features

The service reveals the following information:

  • Utilization and optimization data for existing systems in the Insights for Red Hat Enterprise Linux inventory.
  • Range of systems running in the public cloud.
  • Overview of system characteristics.
  • Highlights potential issues.
  • Formulates suggestions for issue resolution.

1.1. Resource optimization service core concepts
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1.1.1. The resource optimization service performance rules
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Use the resource optimization service to view performance metrics from your managed hosts that run in the supported public cloud, Amazon Web Services (AWS). The service uses a framework called the Performance Co-Pilot (PCP) toolkit to record performance metrics. These metrics empower you to make better business decisions.

Insights performance rules

The performance rules are sets of conditions that are applied to the data collected by PCP. They identify the following system states:

  • Undersized. The undersized state is determined by examining CPU, RAM and disk input/output (I/O) usage, and combining that with CPU idle time, over a period of 24 hours. If that results in a high score, the resource optimization service labels the system as too small for its workload. A system will be reported as undersized whenever any of the dimensions are undersized.
  • Oversized. The oversized state is determined by examining CPU, RAM and disk I/O usage, and combining that with CPU idle time, over a period of 24 hours. If that results in a low score, the resource optimization service labels the system as too big for its workload. A system will be reported as oversized only if all of the dimensions are oversized.
  • Idling. The idling state is determined by examining CPU, RAM and disk I/O usage, and combining that with CPU idle time, over a period of 24 hours. If that results in very low utilization, the resource optimization service labels the system as appropriate for its workload but underused. The idling condition can be viewed as a needs improvement scenario.
  • Optimized. The optimized state is determined by examining CPU, RAM and disk I/O usage, and combining that with CPU idle time, over a period of 24 hours. If that results in a middle point, the resource optimization service labels the system as optimized.
  • Under pressure. This state is only active when Kernel Pressure Stall Information (PSI) has been enabled. Systems are labeled as under pressure when they are optimized utilization-wise, but some pressure condition persists.

The resource optimization service measures the system’s state and the desired performance criteria that you have set, in order to assign a score to the system.

1.1.2. Data security guarantee for the resource optimization service
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The resource optimization service adheres to the data and application security practices for Red Hat Insights for Red Hat Enterprise Linux services. For more details see Security.

1.1.3. Performance metrics for resource optimization
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The resource optimization service installs the pcp package on your system and runs two services, pmcd and pmlogger. Both are part of the Performance Co-Pilot (PCP) toolkit, which monitor and process specific metrics on your system. Metrics are stored in an archive, which the Insights client uploads to Red Hat Insights for Red Hat Enterprise Linux.

1.1.4. Access usage metrics for the resource optimization service
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The resource optimization service captures data from the previous day and provides system utilization metrics after 24 hours. By default, the archive is uploaded to Insights for Red Hat Enterprise Linux at 12:00am +/- 1 hour, local system time. However, the time when this data is uploaded can be configured in the Performance Co-Pilot (PCP) toolkit configuration.

1.1.5. User Access settings in the Red Hat Hybrid Cloud Console
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User Access is the Red Hat implementation of role-based access control (RBAC). Your Organization Administrator uses User Access to configure what users can see and do on the Red Hat Hybrid Cloud Console (the console):

  • Control user access by organizing roles instead of assigning permissions individually to users.
  • Create groups that include roles and their corresponding permissions.
  • Assign users to these groups, allowing them to inherit the permissions associated with their group’s roles.

1.1.5.1. Predefined User Access groups and roles
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To make groups and roles easier to manage, Red Hat provides two predefined groups and a set of predefined roles:

  • Predefined groups

    The Default access group contains all users in your organization. Many predefined roles are assigned to this group. It is automatically updated by Red Hat.

    Note

    If the Organization Administrator makes changes to the Default access group its name changes to Custom default access group and it is no longer updated by Red Hat.

    The Default admin access group contains only users who have Organization Administrator permissions. This group is automatically maintained and users and roles in this group cannot be changed.

    On the Hybrid Cloud Console navigate to Red Hat Hybrid Cloud Console > the Settings icon (⚙) > Identity & Access Management > User Access > Groups to see the current groups in your account. This view is limited to the Organization Administrator.

  • Predefined roles assigned to groups

    The Default access group contains many of the predefined roles. Because all users in your organization are members of the Default access group, they inherit all permissions assigned to that group.

    The Default admin access group includes many (but not all) predefined roles that provide update and delete permissions. The roles in this group usually include administrator in their name.

    On the Hybrid Cloud Console navigate to Red Hat Hybrid Cloud Console > the Settings icon (⚙) > Identity & Access Management > User Access > Roles to see the current roles in your account. You can see how many groups each role is assigned to. This view is limited to the Organization Administrator.

1.1.5.2. Access permissions
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The Prerequisites for each procedure list which predefined role provides the permissions you must have. As a user, you can navigate to Red Hat Hybrid Cloud Console > the Settings icon (⚙) > My User Access to view the roles and application permissions currently inherited by you.

If you try to access Insights for Red Hat Enterprise Linux features and see a message that you do not have permission to perform this action, you must obtain additional permissions. The Organization Administrator or the User Access administrator for your organization configures those permissions.

Use the Red Hat Hybrid Cloud Console Virtual Assistant to ask "Contact my Organization Administrator". The assistant sends an email to the Organization Administrator on your behalf.

Additional resources

For more information about user access and permissions, see User Access Configuration Guide for Role-based Access Control (RBAC).

1.1.5.3. User Access roles for resource optimization users
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The following roles enable standard or enhanced access to resource optimization service features in Insights for Red Hat Enterprise Linux:

  • Resource optimization viewer. Read any resource optimization service resource.
  • Resource optimization administrator. Perform any available operation against any resource optimization service resource.
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