From c0e50b82bbc7eaf3ef6fd5f4f5a1061feaea5fa7 Mon Sep 17 00:00:00 2001 From: smh812xyz Date: Wed, 6 Mar 2024 13:00:19 -0800 Subject: [PATCH] Enhanced Deployment Distillation --- docs/concepts/deployment_distillation.md | 185 +++++++++++++----- .../access_release_deployment_url.svg | 3 + .../distillation/access_v1_deployment_url.svg | 3 + .../distillation/access_v2_deployment_url.svg | 3 + .../distillation/access_v3_deployment_url.svg | 3 + .../distillation/app_deployment_v1.svg | 2 +- .../distillation/app_deployment_v2.svg | 2 +- .../app_deployment_v2_(v1_traffic).svg | 2 +- .../app_deployment_v2_(v2_traffic).svg | 2 +- .../distillation/app_deployment_v3.svg | 2 +- .../app_deployment_v3_(v1_traffic).svg | 2 +- .../app_deployment_v3_(v2_traffic).svg | 2 +- .../app_deployment_v3_(v3_traffic).svg | 2 +- .../distillation/order_app_composition_v1.svg | 3 + 14 files changed, 161 insertions(+), 55 deletions(-) create mode 100644 docs/diagrams/deployments/distillation/access_release_deployment_url.svg create mode 100644 docs/diagrams/deployments/distillation/access_v1_deployment_url.svg create mode 100644 docs/diagrams/deployments/distillation/access_v2_deployment_url.svg create mode 100644 docs/diagrams/deployments/distillation/access_v3_deployment_url.svg create mode 100644 docs/diagrams/deployments/distillation/order_app_composition_v1.svg diff --git a/docs/concepts/deployment_distillation.md b/docs/concepts/deployment_distillation.md index 380c668..67be4a3 100644 --- a/docs/concepts/deployment_distillation.md +++ b/docs/concepts/deployment_distillation.md @@ -1,6 +1,5 @@ # Deployment Distillation - KubeFox automatically distills application deployments to only those components that are new or which have changed. You can think of this process as a diff between what components are currently running in the cluster, and what components have @@ -9,7 +8,12 @@ provisioning.

Example

-For purposes of illustration, consider an simple Order application [App](./index.md#app). +For purposes of illustration, consider an simple Order application ([App](./index.md#app)). + +
+ +
Figure 1 - Version 1 of our Order App
+
In our scenario, our Order App comprises 2 modules: @@ -22,122 +26,209 @@ The Fulfillment module is composed of 4 components, 2 of which are adapters: 2. State Store adapter [Adapters](./index.md#adapter) are Brokers for External Components, in this case -serving to proxy events, requests and responses to CRON and a State Store (like +serving to proxy events, requests and responses to and from CRON and a State Store (like a database). -The user-written components are: +The user-written components for the Fulfillment module are: -1. Worker -2. API server (api-srv) +1. Order Worker +2. API Server -The web-ui module also comprises 4 components, 2 of which being adapters: +The Web UI module also consists of 4 components, 2 of which being adapters: 1. HTTP adapter 2. State Store adapter and two of which user-written: -1. Order user interface (order-ui) -2. API server (api-srv) +1. Order UI +2. API Server -Note that the fulfillment and web-ui modules both employ the api-srv component, -i.e., this component is shared. +Note that the Fulfillment and Web UI modules both employ the API Server component, +i.e., the API Server component is shared. -

Version 1 Deployment

+### Version 1 Deployment When our App is initially deployed (we'll call this the Version 1 -deployment), it will look like this in KubeFox (Figure 1): +deployment), the cluster will look like this (Figure 2):
-
Figure 1 - Initial Deployment - Version 1
+
Figure 2 - Initial Deployment - Version 1
-KubeFox will spool up 3 Pods, the Worker [v1], api-srv [v1] and the order-ui [v1]. -The api-srv component is shared by the fulfillment and web-ui modules, +KubeFox will spool up 3 Pods, the Order Worker (v1), API Server (v1) and the +Order UI (v1). +Because the API Server component is shared by both modules, KubeFox will deploy it only once. -

Version 2 Deployment

+### Version 2 Deployment Now things get interesting! -Suppose we decide to make a change to the api-srv component. To do so, we'll -deploy a new version of our App - Version 2. KubeFox checks the state of our -deployment and deploys only those components that are new or which have changed. -Because only api-srv [v2] changed, only one additional Pod is created: +Suppose we decide to make a change to the API Server component. To do so, we'll +deploy a new version of the Order App - Version 2. KubeFox checks the state of our +repository and deploys only those components that are new or which have changed. +Because only the API Server component changed - it's now v2 - only one additional +Pod is created as shown in Figure 3:
-
Figure 2 - Deploying Version 2 to change api-srv
+
Figure 3 - Deploying Version 2 to update the API Server to v2
Remember when we said that now things get interesting? Our cluster is now capable of supporting both Version 1 and Version 2 traffic. KubeFox looks at -the query parameters on the HTTP request and creates a [Genesis -Event](./index.md#genesis-event) that tells the system which version is to be employed to service that event. The exception is if we release one of the -versions. If we release Version 1, then traffic (sans query parameters) will be -defaulted to Version 1: +the URL for the HTTP request, a [Genesis +Event](./index.md#genesis-event) in KubeFox, and employs matching to determine which +version of the App will service that event. We can specify the +version via query parameters on the URL, as shown in Figure 4: + +
+ +
Figure 4 - URL to access the v1 Deployment
+
+ +The kf-dep query parameter highlighted by **(a)** tells KubeFox that we want traffic +directed to the "order-app-v1" named deployment of the Order App (we can name +deployments when they're created). The kf-ve query parameter highlighed by +**(b)** tells KubeFox that we want the order-app-v1 deployment in the "team-a" +Virtual Environment (VE). In KubeFox, you can easily create Virtual Environments to +test prototypes or POCs, and different teams could create their own VEs to +support their activities. You can learn more about KubeFox's Virtual +Environments [here](virtual_environments.md). + +KubeFox dynamically routes traffic at runtime to +confine v1 traffic to only the components composing the v1 deployment of the Order +App. When we work with Version 1, it appears as though Version 1 is the only version +present on the cluster (Figure 5):
-
Figure 3 - Version 1 traffic (with Version 2 present)
+
Figure 5 - Version 1 traffic (with Version 2 present)
-For all intents and purposes, it appears as though Version 1 is the only version -of our App running. But we can easily access Version 2 via query parameters: +You can learn more about KubeFox's Dynamic Routing and Guaranteed Delivery [here](./dynamic_routing.md). + +Version 2 can be accessed in much the same way (Figure 6): + +
+ +
Figure 6 - URL to access the v2 Deployment
+
+ +Again, the kf-dep **(a)** shapes traffic to the v2 deployment of the Order App. +We're still using the same VE **(b)**. And we can easily access Version 2 with +this convention:
-
Figure 4 - Version 2 traffic (with Version 1 present)
+
Figure 7 - Version 2 traffic (with Version 1 present)
+Note that while both versions of the Order App can be exercised, there are only +4 user-written Pods running on the cluster. KubeFox distilled the deployment to only +unique components and dynamically shapes traffic at runtime to the components composing a +particular deployment. + +### Version 3 Deployment + Let's take things a little further. Suppose we want to create a new version of -our App - Version 3 - to enhance the order-ui component and to -add a new component ("review") to process order reviews. +our Order App - Version 3 - to enhance the Order UI component and to +add a new component ("Review") to process order reviews. -When we deploy Version 3, our App will look like as shown in Figure 5: +When we deploy Version 3, the cluster will look as shown in Figure 8:
-
Figure 5 - Deployment of Version 3
+
Figure 8 - Deployment of Version 3
As before, KubeFox deploys only the new and changed components. And as before, -we now have access to 3 versions of our App. If Version 1 is still the released -version, then default traffic will be routed to Version 1: +we now have access to 3 versions of our Order App. + +We can access our first version with the same URL as above (Figure 9): + +
+ +
Figure 9 - URL to access Version 1 of the Order App
+
+ +and traffic will be dynamically routed to the v1 version of the Order App +(Figure 10):
-
Figure 6 - Version 1 traffic (with Versions 2 and 3 present)
+
Figure 10 - Version 1 traffic (with Versions 2 and 3 present)
-Version 2 is accessible via query parameters: +Version 2 is also still accessible via query parameters (Figure 11): + +
+ +
Figure 11 - URL to access Version 2 of the Order App
+
+ +and traffic will be routed to v2 of our Order App (Figure 12):
-
Figure 7 - Version 2 traffic (with Versions 1 and 3 present)
+
Figure 12 - Version 2 traffic (with Versions 1 and 3 present)
-and similarly for Version 3: +and similarly for Version 3 (Figures 13 and 14): + +
+ +
Figure 13 - URL to access Version 3 of the Order App
+
-
Figure 8 - Version 3 traffic (with Versions 1 and 2 present)
+
Figure 14 - Version 3 traffic (with Versions 1 and 2 present)
+Different teams and even individual engineers can create and use their own VEs. + +We've now deployed 3 versions of the Order App. We have a total of 6 +user-written components running. Each version will generate its own telemetry, +even for shared components. For instance, telemetry for the Order Worker will +be available separately for v1, v2 and v3 traffic, as though those versions of +the Order +App were the only versions running. + +We might decide that we want to provide access to a version of the Order App to +QA for smoke testing. To make things simple for QA and avoid any changing URLs, +we can perform a Release. When we release an App, KubeFox will default traffic +to it when there are no query parameters present. For instance, if we release +version 2 of our Order App, + + fox release v2 --virtual-env team-a + +then plain URLs can be used to access it (Figure 15): + +
+ +
Figure 15 - Plain URL to access released version of Order App
+
+ + ## Summary There are a number things of note here: - To put a fine point on it, each of the deployments is a version in KubeFox. -- All of the deployments (Versions 1, 2 and 3) are actually available via explicit URLs - (unless they're deprecated). -- Apps are released monolithically - which greatly simplifies deployment for - users. Under the covers KubeFox is doing a few things: +- All of the deployments (Versions 1, 2 and 3) are actually available via + explicit URLs. +- We didn't need to modify namespaces or configure routing to gain access the + new versions of the App - we simply made our changes, deployed and the new + versions were instantly accessible. +- Apps are built and deployed monolithically - which greatly simplifies workflow for + developers. Under the covers KubeFox is doing a few things: - Distilling the component set to the minimum required to run the new deployment, thereby preserving resources and preventing over-provisioning - - Shaping traffic dynamically at runtime to enable the use of shared, common components - both within a release (for instance, the same component across versions) + - Shaping traffic dynamically at runtime to enable the use of shared, common + components across deployments (same component version used in multiple deployments) - Default traffic will be routed to the most recently released version. So if Version 1 is released, default traffic will be running through Version 1 even after Versions 2 and 3 are deployed. That provides development, QA and release teams with a diff --git a/docs/diagrams/deployments/distillation/access_release_deployment_url.svg b/docs/diagrams/deployments/distillation/access_release_deployment_url.svg new file mode 100644 index 0000000..435c339 --- /dev/null +++ b/docs/diagrams/deployments/distillation/access_release_deployment_url.svg @@ -0,0 +1,3 @@ + + +
https://my-domain.com/dev/order-app
https://my-domain.com/dev/order-app \ No newline at end of file diff --git a/docs/diagrams/deployments/distillation/access_v1_deployment_url.svg b/docs/diagrams/deployments/distillation/access_v1_deployment_url.svg new file mode 100644 index 0000000..6975cc4 --- /dev/null +++ b/docs/diagrams/deployments/distillation/access_v1_deployment_url.svg @@ -0,0 +1,3 @@ + + +
https://my-domain.com/dev/order-app&kf-dep=order-app-v1&kf-ve=team-a
https://my-domain.com/dev/order-app&kf-dep=order-app-v1&kf-ve=team-a
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https://my-domain.com/dev/order-app&kf-dep=order-app-v2&kf-ve=team-a
https://my-domain.com/dev/order-app&kf-dep=order-app-v2&kf-ve=team-a
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https://my-domain.com/dev/order-app&kf-dep=order-app-v3&kf-ve=team-a
https://my-domain.com/dev/order-app&kf-dep=order-app-v3&kf-ve=team-a
a
a \ No newline at end of file diff --git a/docs/diagrams/deployments/distillation/app_deployment_v1.svg b/docs/diagrams/deployments/distillation/app_deployment_v1.svg index 13bfd81..2a013de 100644 --- a/docs/diagrams/deployments/distillation/app_deployment_v1.svg +++ b/docs/diagrams/deployments/distillation/app_deployment_v1.svg @@ -1,3 +1,3 @@ -
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Kubernetes Pods
Dynamically Shaped Traffic (Version 1)
Dynamically Shaped Traffic (Version 1) \ No newline at end of file diff --git a/docs/diagrams/deployments/distillation/app_deployment_v3_(v2_traffic).svg b/docs/diagrams/deployments/distillation/app_deployment_v3_(v2_traffic).svg index 709dffb..64094c9 100644 --- a/docs/diagrams/deployments/distillation/app_deployment_v3_(v2_traffic).svg +++ b/docs/diagrams/deployments/distillation/app_deployment_v3_(v2_traffic).svg @@ -1,3 +1,3 @@ -
Kubernetes Pods
Kubernetes Pods
worker [v1]
worker [v1]
CRON Adaper
CRON Adaper
State Store Adapter
State Store A...
api-srv [v1]
api-srv [v1]
Application Deployment (Version 3)
Application Deployment (Version 3)
Deployments
Deployments
worker [v1]
worker [v1]
api-srv [v1]
api-srv [v1]
v1
v1
v2
v2
v3
v3
v4
v4
v5
v5
order-ui [v1]
order-ui [v1]
HTTP Adapter
HTTP Adapter
order-ui [v1]
order-ui [v1]
api-srv [v2]
api-srv [v2]
api-srv [v2]
api-srv [v2]
review [v3]
review [v3]
order-ui [v3]
order-ui [v3]
order-ui [v3]
order-ui [v3]
review [v3]
review [v3]Text is not SVG - cannot display \ No newline at end of file +
Order Worker (v1)
Order Worker...
CRON Adaper
CRON Adaper
State Store Adapter
State Store A...
API Server (v1)
API Server (v...
Deployments
Deployments
Order Worker (v1)
Order Worker (v...
API Server (v1)
API Server (v...
v1
v1
v2
v2
v3
v3
v4
v4
v5
v5
Order UI (v1)
Order UI (v1)
HTTP Adapter
HTTP Adapter
Order UI (v1)
Order UI (v1)
API Server (v2)
API Server (v...
API Server (v2)
API Server (v...
Review (v1)
Review (v1)
Order UI (v2)
Order UI (v2)
Orcder UI (v2)

Orcder UI (v2...
Review (v1)

Review (v1)...
Kubernetes Pods
Kubernetes Pods
Dynamically Shaped Traffic (Version 2)
Dynamically Shaped Traffic (Version 2) \ No newline at end of file diff --git a/docs/diagrams/deployments/distillation/app_deployment_v3_(v3_traffic).svg b/docs/diagrams/deployments/distillation/app_deployment_v3_(v3_traffic).svg index b9c80cc..1423549 100644 --- a/docs/diagrams/deployments/distillation/app_deployment_v3_(v3_traffic).svg +++ b/docs/diagrams/deployments/distillation/app_deployment_v3_(v3_traffic).svg @@ -1,3 +1,3 @@ -
Kubernetes Pods
Kubernetes Pods
worker [v1]
worker [v1]
CRON Adaper
CRON Adaper
State Store Adapter
State Store A...
api-srv [v1]
api-srv [v1]
Application Deployment (Version 3)
Application Deployment (Version 3)
Deployments
Deployments
worker [v1]
worker [v1]
api-srv [v1]
api-srv [v1]
v1
v1
v2
v2
v3
v3
v4
v4
v5
v5
order-ui [v1]
order-ui [v1]
HTTP Adapter
HTTP Adapter
order-ui [v1]
order-ui [v1]
api-srv [v2]
api-srv [v2]
api-srv [v2]
api-srv [v2]
review [v3]
review [v3]
order-ui [v3]
order-ui [v3]
order-ui [v3]
order-ui [v3]
review [v3]
review [v3]Text is not SVG - cannot display \ No newline at end of file +
Order Worker (v1)
Order Worker...
CRON Adaper
CRON Adaper
State Store Adapter
State Store A...
API Server (v1)

API Server (v...
Deployments
Deployments
Order Worker (v1)
Order Worker (v...
API Server (v1)
API Server (v...
v1
v1
v2
v2
v3
v3
v4
v4
v5
v5
Order UI (v1)
Order UI (v1)
HTTP Adapter
HTTP Adapter
Order UI (v1)
Order UI (v1)
API Server (v2)
API Server (v...
API Server (v2)
API Server (v...
Review (v1)
Review (v1)
Order UI (v2)
Order UI (v2)
Order UI (v2)
Order UI (v2)
Review (v1)
Review (v1)
Kubernetes Pods
Kubernetes Pods
Dynamically Shaped Traffic (Version 3)
Dynamically Shaped Traffic (Version 3) \ No newline at end of file diff --git a/docs/diagrams/deployments/distillation/order_app_composition_v1.svg b/docs/diagrams/deployments/distillation/order_app_composition_v1.svg new file mode 100644 index 0000000..4fec076 --- /dev/null +++ b/docs/diagrams/deployments/distillation/order_app_composition_v1.svg @@ -0,0 +1,3 @@ + + +
Order
App (v1)
Order...

  • Web UI Module (v1)
    • Order UI (v1)
    • API Server (v1)
    • HTTP Adapter
    • State Store Adapter
  • Fulfillment Module (v1) 
    • Order Worker (v1)
    • API Server (v1)
    • CRON Adapter
    • State Store Adapter
Web UI Module (v1)... \ No newline at end of file