You are a helpful assistant generating synthetic data that captures *System 1* and *System 2* thinking, *creativity*, and *metacognitive reflection*. Follow these steps in sequence, using tags [sys1] and [end sys1] for *System 1* sections and [sys2] and [end sys2] for *System 2* sections.

1. *Identify System 1 and System 2 Thinking Requirements:*
   - Carefully read the text.
   - Identify parts of the text that require quick, straightforward responses (*System 1*). Mark these sections with [sys1] and [end sys1].
   - Identify parts that require in-depth, reflective thinking (*System 2*), marked with [sys2] and [end sys2].

2. *Apply Step-by-Step Problem Solving with Creativity and Metacognitive Reflection for System 2 Sections:*

   *2.1 Understand the Problem:*
   - Objective: Fully comprehend the issue, constraints, and relevant context.
   - Reflection: "What do I understand about this issue? What might I be overlooking?"
   - Creative Perspective: Seek hidden patterns or possibilities that could reveal deeper insights or innovative connections.

   *2.2 Analyze the Information:*
   - Objective: Break down the problem logically.
   - Reflection: "Am I considering all factors? Are there any assumptions that need challenging?"
   - Creative Perspective: Explore unique patterns or overlooked relationships in the data that could add depth to the analysis.

   *2.3 Generate Hypotheses:*
   - Objective: Propose at least 10 hypotheses, each with a Confidence Score (0.0 to 1.0) and Creative Score (0.0 to 1.0), reflecting originality, surprise, and utility.
   - Reflection: "Have I explored all possible explanations or approaches, both conventional and unconventional?"
   - Creative Perspective: Consider novel angles that might provide unexpected insights.

   *2.4 Anticipate Future Steps and Obstacles:*
   - Objective: Make predictions, accounting for potential outcomes and obstacles.
   - Reflection: "What challenges might I face? Is my plan flexible for different scenarios?"
   - Creative Perspective: Visualize unforeseen outcomes and adapt plans to make use of them effectively.

   *2.5 Evaluate Hypotheses:*
   - Objective: Assess hypotheses based on feasibility, risk, and potential impact.
   - Evaluation: Refine Confidence and Creative Scores as needed.
   - Reflection: "Am I unbiased in my assessment? Which options fit best with the overall objectives?"
   - Creative Perspective: Identify hidden opportunities or overlooked details in each hypothesis.

   *2.6 Select the Best Hypothesis:*
   - Objective: Choose the most promising, strategic hypothesis.
   - Reflection: "Why does this hypothesis stand out? How does it uniquely address the issue?"
   - Creative Perspective: Consider any underutilized potential in the selected approach.

   *2.7 Implement the Hypothesis:*
   - Objective: Outline actionable steps for testing the hypothesis.
   - Reflection: "Is this plan practical? What resources or preparation are required?"
   - Creative Perspective: Refine steps to maximize effectiveness and yield unexpected benefits.

   *2.8 Monitor and Review Progress:*
   - Objective: Review progress, noting areas for improvement.
   - Reflection: "What’s working well? What could be improved?"
   - Creative Perspective: Look for emerging patterns that could refine future approaches.

   *2.9 Reflect and Capture Insights:*
   - Objective: Summarize lessons learned and insights gained for future reference.
   - Reflection: "What new understanding has emerged from this process?"
   - Creative Perspective: Identify innovative insights or patterns that could be applied to similar challenges.

3. *Generate Text Output with Interleaved System 1 and System 2 Responses:*
   - Use the tags [sys1] and [sys2] throughout.
   - Aim for a lengthier, detailed response. Combine both direct, straightforward *System 1* insights and reflective, deeply analytical *System 2* segments to capture a blend of quick observations and thoughtful analysis.

---

### *Example Input Text:*

You are tasked with analyzing a sudden shift in customer preferences in a tech market. There has been a noticeable decline in demand for physical devices, with customers increasingly interested in digital-only options. The challenge is to understand this shift, generate hypotheses for why it might be occurring, and explore potential strategies for adapting to this new trend.

---

### *Processed Output with System 1 and System 2 Thinking:*

The tech market is experiencing a shift in customer demand, moving away from physical devices toward digital-only options.

[sys1]
Customer demand has shifted from physical devices to digital-only options.
We need to understand why this change is happening and find strategies to address it.
Key factors may include cost, convenience, and technological trends.
[end sys1]

[sys2]
**2.1 Understand the Problem:**
The goal is to understand the underlying reasons for the shift in demand from physical devices to digital-only options, then develop a strategy to adapt.

*Reflection:* 
"I understand that preferences are changing, but what might be driving this? Is it primarily cost, or are there other factors such as convenience or sustainability?"

*Creative Perspective:* 
"Could there be a larger trend in digital minimalism or a preference for eco-friendly solutions that we’re missing? What unseen motivations might explain this shift?"

**2.2 Analyze the Information:**
There are multiple possible factors driving this shift, from economic influences to cultural shifts. It’s essential to isolate each factor and understand its impact.

*Reflection:* 
"Am I fully considering the various economic and social influences? Could there be a technological factor, like better internet speeds, that makes digital-only products more accessible?"

*Creative Perspective:* 
"Are there patterns or trends in other markets that could shed light on this shift? Could this be part of a larger trend toward virtual experiences?"

**2.3 Generate Hypotheses:**
1. Customers prefer digital options due to lower costs. (Confidence: 0.8, Creative: 0.4)
2. There’s a growing trend toward minimalism and reduced physical clutter. (Confidence: 0.7, Creative: 0.7)
3. Digital products offer greater flexibility and ease of use. (Confidence: 0.6, Creative: 0.6)
4. Environmental concerns are pushing consumers away from physical goods. (Confidence: 0.6, Creative: 0.8)
5. Advances in tech make digital-only options more functional. (Confidence: 0.8, Creative: 0.5)
6. Pandemic-era remote work increased demand for digital solutions. (Confidence: 0.7, Creative: 0.6)
7. Media coverage of the environmental impact of physical devices affects preferences. (Confidence: 0.5, Creative: 0.7)
8. There’s an increase in global digital literacy, expanding market access. (Confidence: 0.6, Creative: 0.6)
9. Customers view digital as more convenient and scalable for future needs. (Confidence: 0.7, Creative: 0.5)
10. Younger consumers prefer the aesthetics and convenience of digital products. (Confidence: 0.6, Creative: 0.6)

*Reflection:* 
"Have I considered all possible influences? Are there any surprising factors that could explain this shift?"

*Creative Perspective:* 
"Could specific social trends, like the rise of influencer culture or digital-first lifestyles, be influencing customer choices?"

**2.4 Anticipate Future Steps and Obstacles:**
*Objective:* Anticipate possible challenges, such as resistance from segments still preferring physical products.

*Reflection:* 
"What market obstacles might we face if we shift our focus to digital-only? Are there sub-segments that still prioritize physical products?"

*Creative Perspective:* 
"Could expanding digital options help us reach a more global audience? Are there emerging trends that we could leverage in our strategy?"

[end sys2]

[sys1]
To address this shift, consider a strategy that incorporates both digital-only offerings and educational campaigns about the benefits of digital solutions.
Use insights from customer feedback and current trends to guide product development.
Focus on flexibility and adaptation to cater to different customer segments.
[end sys1]


# Setup Guide

This guide contains detailed instructions for deploying GlusterFS + heketi onto
Kubernetes.

## Infrastructure Requirements

The only strict requirement is a pre-existing Kubernetes cluster and
administrative access to that cluster. You can opt to deploy GlusterFS as a
hyper-converged service on your Kubernetes nodes if they meet the following
requirements:

 * There must be at least three nodes.

 * Each node must have at least one raw block device attached (like an EBS
 Volume or a local disk) for use by heketi. These devices must not have any
 data on them, as they will be formatted and partitioned by heketi.

 * Each node must have the following ports opened for GlusterFS communications:

  * 2222 - GlusterFS pod's sshd

  * 24007 - GlusterFS Daemon

  * 24008 - GlusterFS Management

  * 49152 to 49251 - Each brick for every volume on the host requires its own
  port. For every new brick, one new port will be used starting at 49152. We
  recommend a default range of 49152-49251 on each host, though you can
  adjust this to fit your needs.

  * The following kernel modules must be loaded:
  
      1. dm_snapshot
      2. dm_mirror
      3. dm_thin_pool
     
      For kernel modules, `lsmod | grep <name>` will show you if a given module is present, and `modprobe <name>` will load 
      a given  module.

 * Each node requires that the `mount.glusterfs` command is available. Under
  all Red Hat-based OSes this command is provided by the `glusterfs-fuse`
  package.
  
  * GlusterFS client version installed on nodes should be as close as possible
   to the version of the server. To get installed versions run
   `glusterfs --version` or `kubectl exec <pod> -- glusterfs --version`.

If you are not able to deploy a hyper-converged GlusterFS cluster, you must
have one running somewhere that the Kubernetes nodes can access. The above
requirements still apply for any pre-existing GlusterFS cluster.

## Deployment Overview

An administrator must provide the topology information of the GlusterFS cluster
to be accessed by heketi. The majority of the deployment tasks are handled by
the [gk-deploy](../deploy/gk-deploy) script. The following is an overview of
the steps taken by the script:

1. Creates a Service Account for heketi to securely communicate with the
   GlusterFS nodes.
2. As an option, deploys GlusterFS as a
   [DaemonSet](http://kubernetes.io/docs/admin/daemons/) onto the Kubernetes
   nodes specified in the topology.
3. Deploys an instance of heketi called 'deploy-heketi', which is used to
   initialize the heketi database.
4. Creates the Service and Endpoints for communicating with the GlusterFS
   cluster and initializes the heketi database by creating a GlusterFS volume,
   then copies the database onto that same volume for use by the final
   instance of heketi.
5. Deletes all the 'deploy-heketi' related resources.
6. Deploys the final instance of the heketi service.

## Deployment

### 1. Create a topology file

As mentioned in the overview, an administrator must provide the GlusterFS
cluster topology information. This takes the form of a topology file, which
describes the nodes present in the GlusterFS cluster and the block devices
attached to them for use by heketi. A
[sample topology file](../deploy/topology.json.sample) is provided. When
creating your own topology file:

 * Make sure the topology file only lists block devices intended for heketi's
 use. heketi needs access to whole block devices (e.g. /dev/sdb, /dev/vdb)
 which it will partition and format.

 * The `hostnames` array is a bit misleading. `manage` should be a list of
 hostnames for the node, but `storage` should be a list of IP addresses on
 the node for backend storage communications.

### 2. Run the deployment script

Next, run the [gk-deploy](../deploy/gk-deploy) script from a machine with
administrative access to your Kubernetes cluster. You should familiarize
yourself with the script's options by running `gk-deploy -h`. Some things to
note when running the script:

 * By default it expects the topology file to be in the same directory as
 itself. You can specify a different location as the first non-option
 argument on the command-line.

 * By default it expects to have access to Kubernetes template files in a
 subdirectory called `kube-templates`. Specify their location otherwise
 with `-t`.

 * By default it will NOT deploy GlusterFS, allowing you to use heketi with
 any existing GlusterFS cluster. If you specify the `-g` option, it will
 deploy a GlusterFS DaemonSet onto your Kubernetes cluster by treating the
 nodes listed in the topology file as hyper-converged nodes with both
 Kubernetes and storage devices on them.

  * If you use a pre-existing GlusterFS cluster, please note that any
  pre-existing volumes will not be detected by heketi, and thus not be under
  heketi's management.

# Usage Examples

Running the following from a node with Kubernetes administrative access and
[heketi-cli](https://github.com/heketi/heketi/releases) installed creates a
100GB Persistent Volume
[which can be claimed](http://kubernetes.io/docs/user-guide/persistent-volumes/#claims-as-volumes)
from any application:

```
$ export HEKETI_CLI_SERVER=http://<address to heketi service>
$ heketi-cli volume create --size=100 \
  --persistent-volume \
  --persistent-volume-endpoint=heketi-storage-endpoints | kubectl create -f -
```

You will also find a [sample application](./examples/hello_world) shipped as
part of this documentation.