Docs - Reconcile Jekyll, Kramdown, GFM formatting (#350)

* Spellcheck and removing trailing spaces
* Removing stale SUMMARY.md file
* Cleanly escaping double curly braces in Jekyll
* Fixing kramdown and jekyll rendering errors
* Formatting fenced code blocks

Author: alishamayor

docs/ADVANCED.md

@@ -5,8 +5,8 @@ Let's dive into the nitty-gritty of how to tweak the setup of your containerized
 ## Navigation
 
 * [Runtime configuration](#runtime-configuration)
-    * [Using default.yml](#using-defaultyml)
-    * [Configuration specs for default.yml](#configuration-specs-for-defaultyml)
+    * [Using `default.yml`](#using-defaultyml)
+    * [Configuration specs for `default.yml`](#configuration-specs-for-defaultyml)
         * [Global variables](#global-variables)
         * [Configure Splunk](#configure-splunk)
         * [Configured app installation paths](#configure-app-installation-paths)
@@ -38,24 +38,30 @@ The purpose of the `default.yml` is to define a standard set of variables that c
 
 #### Generation
 The image contains a script to enable dynamic generation of this file automatically. Run the following command to generate a `default.yml`:
-```
+```bash
 $ docker run --rm -it splunk/splunk:latest create-defaults > default.yml
 ```
 
 You can also pre-seed some settings based on environment variables during this `default.yml` generation process. For example, you can define `SPLUNK_PASSWORD` with the following command:
-```
+```bash
 $ docker run --rm -it -e SPLUNK_PASSWORD=<password> splunk/splunk:latest create-defaults > default.yml
 ```
 #### Usage
 When starting the docker container, the `default.yml` can be mounted in `/tmp/defaults/default.yml` or fetched dynamically with `SPLUNK_DEFAULTS_URL`. Ansible provisioning will read in and honor these settings.
 
 Environment variables specified at runtime will take precedence over anything defined in `default.yml`.
-```
+```bash
 # Volume-mounting option
-$ docker run -d -p 8000:8000 -v default.yml:/tmp/defaults/default.yml -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=<password> splunk/splunk:latest
+$ docker run -d -p 8000:8000 -e "SPLUNK_PASSWORD=<password>" \
+             -e "SPLUNK_START_ARGS=--accept-license" \
+             -v default.yml:/tmp/defaults/default.yml \
+             splunk/splunk:latest
 
 # URL option
-$ docker run -d -p 8000:8000 -v -e SPLUNK_DEFAULTS_URL=http://company.net/path/to/default.yml -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=<password> splunk/splunk:latest
+$ docker run -d -p 8000:8000 -v -e "SPLUNK_PASSWORD=<password>" \
+             -e "SPLUNK_START_ARGS=--accept-license" \
+             -e "SPLUNK_DEFAULTS_URL=http://company.net/path/to/default.yml" \
+             splunk/splunk:latest
 ```
 
 ### Configuration specs for default.yml
@@ -65,7 +71,7 @@ $ docker run -d -p 8000:8000 -v -e SPLUNK_DEFAULTS_URL=http://company.net/path/t
 Variables at the root level influence the behavior of everything in the container, as they have global scope.
 
 Example:
-```
+```yaml
 ---
 retry_num: 100
 ```
@@ -79,7 +85,9 @@ retry_num: 100
 The major object `splunk` in the YAML file contains variables that control how Splunk operates.
 
 Sample:
-```
+<!-- {% raw %} -->
+```yaml
+---
 splunk:
   opt: /opt
   home: /opt/splunk
@@ -98,7 +106,9 @@ splunk:
     # hec.token is used only for ingestion (receiving Splunk events)
     token: <default_hec_token>
   smartstore: null
+  ...
 ```
+<!-- {% endraw %} -->
 
 | Variable Name | Description | Parent Object | Default Value | Required for Standalone | Required for Search Head Clustering | Required for Index Clustering |
 | --- | --- | --- | --- | --- | --- | --- |
@@ -124,12 +134,15 @@ splunk:
 The `app_paths` section under `splunk` controls how apps are installed inside the container.
 
 Sample:
-```
+```yaml
+---
+splunk:
   app_paths:
     default: /opt/splunk/etc/apps
     shc: /opt/splunk/etc/shcluster/apps
     idxc: /opt/splunk/etc/master-apps
     httpinput: /opt/splunk/etc/apps/splunk_httpinput
+  ...
 ```
 
 | Variable Name | Description | Parent Object | Default Value | Required for Standalone | Required for Search Head Clustering | Required for Index Clustering |
@@ -144,12 +157,15 @@ Sample:
 Search Head Clustering is configured using the `shc` section under `splunk`.
 
 Sample:
-```
+```yaml
+---
+splunk:
   shc:
     enable: false
     secret: <secret_key>
     replication_factor: 3
     replication_port: 9887
+  ...
 ```
 
 | Variable Name | Description | Parent Object | Default Value | Required for Standalone | Required for Search Head Clustering | Required for Index Clustering |
@@ -164,12 +180,15 @@ Sample:
 Indexer Clustering is configured using the `idxc` section under `splunk`.
 
 Sample:
-```
+```yaml
+---
+splunk:
   idxc:
     secret: <secret_key>
     search_factor: 2
     replication_factor: 3
     replication_port: 9887
+  ...
 ```
 
 | Variable Name | Description | Parent Object | Default Value | Required for Standalone| Required for Search Head Clustering | Required for Index Clustering |
@@ -181,16 +200,22 @@ Sample:
 
 ## Install apps
 Apps can be installed by using the `SPLUNK_APPS_URL` environment variable when creating the Splunk container:
-```
-$ docker run -it --name splunk -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=<password> -e SPLUNK_APPS_URL=http://company.com/path/to/app.tgz splunk/splunk:latest
+```bash
+$ docker run --name splunk -e "SPLUNK_PASSWORD=<password>" \
+              -e "SPLUNK_START_ARGS=--accept-license" \
+              -e "SPLUNK_APPS_URL=http://company.com/path/to/app.tgz" \
+              -it splunk/splunk:latest
 ```
 
 See the [full app installation guide](advanced/APP_INSTALL.md) to learn how to specify multiple apps and how to install apps in a distributed environment.
 
 ## Apply Splunk license
 Licenses can be added with the `SPLUNK_LICENSE_URI` environment variable when creating the Splunk container:
-```
-$ docker run -it --name splunk -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=<password> -e SPLUNK_LICENSE_URI=http://company.com/path/to/splunk.lic splunk/splunk:latest
+```bash
+$ docker run --name splunk -e "SPLUNK_PASSWORD=<password>" \
+              -e "SPLUNK_START_ARGS=--accept-license" \
+              -e "SPLUNK_LICENSE_URI=http://company.com/path/to/splunk.lic" \
+              -it splunk/splunk:latest
 ```
 
 See the [full license installation guide](advanced/LICENSE_INSTALL.md) to learn how to specify multiple licenses and how to use a central, containerized license manager.
@@ -200,8 +225,8 @@ When Splunk boots, it registers all the config files in various locations on the
 
 Using the Splunk Docker image, users can also create their own config files, following the same INI file format that drives Splunk. This is a power-user/admin-level feature, as invalid config files can break or prevent start-up of your Splunk installation.
 
-User-specified config files are set in `default.yml` by creating a `conf` key under  `splunk`, in the format below:
-```
+User-specified config files are set in `default.yml` by creating a `conf` key under `splunk`, in the format below:
+```yaml
 ---
 splunk:
   conf:
@@ -217,7 +242,7 @@ splunk:
 This generates a file `user-prefs.conf`, owned by the correct Splunk user and group and located in the given directory (in this case, `/opt/splunkforwarder/etc/users/admin/user-prefs/local`).
 
 Following INI format, the contents of `user-prefs.conf` will resemble the following:
-```
+```ini
 [general]
 search_syntax_highlighting = dark
 default_namespace = appboilerplate
@@ -235,7 +260,7 @@ This is a capability only available for indexer clusters (cluster_master + index
 The Splunk Docker image supports SmartStore in a bring-your-own backend storage provider format. Due to the complexity of this option, SmartStore is only enabled if you specify all the parameters in your `default.yml` file.
 
 Sample configuration that persists *all* indexes (default) with a SmartStore backend:
-```
+```yaml
 ---
 splunk:
   smartstore:
@@ -259,20 +284,22 @@ The SmartStore cache manager controls data movement between the indexer and the
 * The `index` stanza corresponds to [indexes.conf options](https://docs.splunk.com/Documentation/Splunk/latest/admin/Indexesconf).
 
 This example defines cache settings and retention policy:
-```
-smartstore:
-  cachemanager:
-    max_cache_size: 500
-    max_concurrent_uploads: 7
-  index:
-    - indexName: custom_index
-      remoteName: my_storage
-      scheme: http
-      remoteLocation: my_storage.net
-      maxGlobalDataSizeMB: 500
-      maxGlobalRawDataSizeMB: 200
-      hotlist_recency_secs: 30
-      hotlist_bloom_filter_recency_hours: 1
+```yaml
+splunk:
+  smartstore:
+    cachemanager:
+      max_cache_size: 500
+      max_concurrent_uploads: 7
+    index:
+      - indexName: custom_index
+        remoteName: my_storage
+        scheme: http
+        remoteLocation: my_storage.net
+        maxGlobalDataSizeMB: 500
+        maxGlobalRawDataSizeMB: 200
+        hotlist_recency_secs: 30
+        hotlist_bloom_filter_recency_hours: 1
+  ...
 ```
 
 ## Use a deployment server
@@ -291,7 +318,7 @@ To secure network traffic from one Splunk instance to another (e.g. forwarders t
 If you are enabling SSL on one tier of your Splunk topology, it's likely all instances will need it. To achieve this, generate your server and CA certificates and add them to the `default.yml`, which gets shared across all Splunk docker containers.
 
 Sample `default.yml` snippet to configure Splunk TCP with SSL:
-```
+```yaml
 splunk:
   ...
   s2s:
@@ -312,7 +339,7 @@ Building your own images from source is possible, but neither supported nor reco
 The supplied `Makefile` in the root of this project contains commands to control the build:
 1. Fork the [docker-splunk GitHub repository](https://github.com/splunk/docker-splunk/)
 1. Clone your fork using git and create a branch off develop
-    ```
+    ```bash
     $ git clone [email protected]:YOUR_GITHUB_USERNAME/docker-splunk.git
     $ cd docker-splunk
     ```
@@ -351,14 +378,12 @@ The `splunk/common-files` directory contains a Dockerfile that extends the base
     ```
     $ make minimal-redhat-8
     ```
-
   * **Bare image**
 
     Build a full Splunk base image *without* Ansible.
     ```
     $ make bare-redhat-8
     ```
-
   * **Full image**
 
     Build a full Splunk base image *with* Ansible.

docs/ARCHITECTURE.md

@@ -1,5 +1,5 @@
 ## Architecture
-From a design perspective, the containers brought up with the `docker-splunk` images are meant to provision themselves locally and asynchronously. The execution flow of the provisioning process is meant to gracefully handle interoperability in this manner, while also maintaining idempotency and reliability. 
+From a design perspective, the containers brought up with the `docker-splunk` images are meant to provision themselves locally and asynchronously. The execution flow of the provisioning process is meant to gracefully handle interoperability in this manner, while also maintaining idempotency and reliability.
 
 ## Navigation
 
@@ -9,7 +9,7 @@ From a design perspective, the containers brought up with the `docker-splunk` im
 * [Supported platforms](#supported-platforms)
 
 ## Networking
-By default, the Docker image exposes a variety of ports for both external interaction as well as internal use. 
+By default, the Docker image exposes a variety of ports for both external interaction as well as internal use.
 ```
 EXPOSE 8000 8065 8088 8089 8191 9887 9997
 ```
@@ -28,11 +28,13 @@ Below is a table detailing the purpose of each port, which can be used as a refe
 
 ## Design
 
-##### Remote networking 
-Particularly when bringing up distributed Splunk topologies, there is a need for one Splunk instances to make a request against another Splunk instance in order to construct the cluster. These networking requests are often prone to failure, as when Ansible is executed asyncronously there are no guarantees that the requestee is online/ready to receive the message.
+#### Remote networking
+Particularly when bringing up distributed Splunk topologies, there is a need for one Splunk instances to make a request against another Splunk instance in order to construct the cluster. These networking requests are often prone to failure, as when Ansible is executed asynchronously there are no guarantees that the requestee is online/ready to receive the message.
 
 While developing new playbooks that require remote Splunk-to-Splunk connectivity, we employ the use of `retry` and `delay` options for tasks. For instance, in this example below, we add indexers as search peers of individual search head. To overcome error-prone networking, we have retry counts with delays embedded in the task. There are also break-early conditions that maintain idempotency so we can progress if successful:
-```
+
+<!-- {% raw %} -->
+```yaml
 - name: Set all indexers as search peers
   command: "{{ splunk.exec }} add search-server https://{{ item }}:{{ splunk.svc_port }} -auth {{ splunk.admin_user }}:{{ splunk.password }} -remoteUsername {{ splunk.admin_user }} -remotePassword {{ splunk.password }}"
   become: yes
@@ -49,9 +51,12 @@ While developing new playbooks that require remote Splunk-to-Splunk connectivity
   no_log: "{{ hide_password }}"
   when: "'splunk_indexer' in groups"
 ```
+<!-- {% endraw %} -->
 
 Another utility you can add when creating new plays is an implicit wait. For more information on this, see the `roles/splunk_common/tasks/wait_for_splunk_instance.yml` play which will wait for another Splunk instance to be online before making any connections against it.
-```
+
+<!-- {% raw %} -->
+```yaml
 - name: Check Splunk instance is running
   uri:
     url: https://{{ splunk_instance_address }}:{{ splunk.svc_port }}/services/server/info?output_mode=json
@@ -68,6 +73,7 @@ Another utility you can add when creating new plays is an implicit wait. For mor
   ignore_errors: true
   no_log: "{{ hide_password }}"
 ```
+<!-- {% endraw %} -->
 
 ## Supported platforms
 At the current time, this project only officially supports running Splunk Enterprise on `debian:stretch-slim`. We do have plans to incorporate other operating systems and Windows in the future.

docs/CONTRIBUTING.md

@@ -116,7 +116,7 @@ There are multiple types of tests. The location of the test code varies with typ
     $ make medium-tests
     ```
 
-3. **Large:** Exercises the entire system, end-to-end; used to identify crucial performance and basic functionality that will be run for every code check-in and commit; may launch or interact with services in a datacenter, preferably with a staging environment to avoid affecting production
+3. **Large:** Exercises the entire system, end-to-end; used to identify crucial performance and basic functionality that will be run for every code check-in and commit; may launch or interact with services in a data center, preferably with a staging environment to avoid affecting production
     ```
     $ make large-tests
     ```