doc: add emissary introduction

2023-05-23 14:48:49 +02:00 · 2023-05-23 14:48:49 +02:00 · e56809289c
parent 6a976c0b51
commit e56809289c
5 changed files with 192 additions and 1 deletions
--- a/.gitignore
+++ b/.gitignore
@ -9,4 +9,5 @@ dist/
 /agent-key.json
 /apps
 /server-key.json
-/.emissary-token
+/.emissary-token
+/out
--- a/doc/README.md
+++ b/doc/README.md
@ -1,5 +1,7 @@
 # Documentation

+- (FR) - [Introduction](./fr/introduction.md)
+
 ## Tutorials

 - (FR) - [Premiers pas](./tutorials/fr/first-steps.md)
--- a/doc/fr/introduction.md
+++ b/doc/fr/introduction.md
@ -0,0 +1,30 @@
+# Introduction
+
+"Emissary" est un programme entrant dans la catégorie des outils de gestion et déploiement de configuration.
+
+En utilisant un agent déployé sur chaque système cible, il permet aux administrateurs système de centraliser le contrôle et la supervision de la configuration. Grâce à ses fonctionnalités avancées, il est capable de faire converger la configuration d'une machine vers un modèle précis défini par une ou plusieurs spécifications centralisées sur un serveur de pilotage dédié.
+
+Le principal atout d'"Emissary" réside dans sa capacité à activer des "contrôleurs" spécifiques pour chaque aspect de la configuration système. Ces contrôleurs sont des modules intelligents qui agissent comme des agents spécialisés, veillant à ce que les paramètres de configuration soient correctement appliqués et respectent les spécifications définies.
+
+Grâce à cette approche modulaire, "Emissary" peut gérer diverses facettes de la configuration, telles que les paramètres réseau, les règles de sécurité, les options de performance et bien plus encore. Chaque contrôleur est conçu pour répondre à des besoins spécifiques, offrant ainsi une flexibilité et une granularité optimales dans la gestion de la configuration.
+
+Certains contrôleurs permettent également l'exécution de services spécialisés comme des serveurs mandataires inverses ou des applications web autonomes.
+
+L'utilisation d'un serveur de pilotage centralisé permet à "Emissary" de stocker et de mettre à jour les spécifications de configuration de manière cohérente. Les administrateurs peuvent définir des modèles de configuration précis, les affiner au fil du temps et les appliquer en un seul clic sur l'ensemble du parc de machines gérées. Cela garantit une uniformité et une conformité accrues, tout en facilitant la maintenance et les mises à jour à grande échelle.
+
+À l'heure actuelle, Emissary est conçu pour cibler spécifiquement le système d'exploitation OpenWRT. L'activation des "contrôleurs" spécifiques à cet OS permet de converger la configuration de la machine OpenWRT vers un modèle correspondant aux spécifications centralisées sur le serveur de pilotage. Ces spécifications peuvent inclure des paramètres réseau, des configurations de sécurité, des règles de pare-feu, des options de routage, des services système, et bien d'autres éléments spécifiques à OpenWRT. 
+
+## Vue d'ensemble de l'architecture
+
+![](./resources/overview.svg)
+
+
+## Contrôleurs
+
+Voici la liste des contrôleurs implémentés à ce jour:
+
+- **Contrôleur UCI** - Permet de modifier les données [UCI](https://openwrt.org/docs/guide-user/base-system/uci) (**U**nified **C**onfiguration **S**ystem) d'un système OpenWRT et ainsi configurer les services systèmes, les règles pare-feu, la configuration des NICs, etc sur celui-ci.
+- **Contrôleur SysUpgrade** - Permet de mettre à jour un système OpenWRT via l'outil [`sysupgrade`](https://openwrt.org/docs/guide-user/installation/generic.sysupgrade).
+- **Contrôleur Proxy** - Permet de déployer des services de type passerelle mandataire inverse ("reverse proxy") sur la machine cible.
+- **Contrôleur mDNS** - Permet d'annoncer des services via mDNS sur les différents réseaux de la machine cible.
+- **Contrôleur App** - Permet de déployer des applications web "embarquées" (s'exécutant localement et non dépendantes d'une connectivité internet) sur la machine cible. Voir le projet ["Edge App"](https://forge.cadoles.com/arcad/edge).
--- a/doc/fr/resources/overview.plantuml
+++ b/doc/fr/resources/overview.plantuml
@ -0,0 +1,59 @@
+@startuml
+top to bottom direction
+skinparam linetype ortho
+
+node PilotNode as "Pilot Node" {
+    database DataStore as "Data Store"
+
+    component EmissaryServer as "Emissary Server" {
+
+        component SpecificationRegistry as "Specification Registry" {
+            component UCISpecification as "UCI Spec"
+            component MDNSSpecification as "mDNS Spec"
+            component AppSpecification as "App Spec"
+            component ProxySpecification as "Proxy Spec"
+            component SysUpgradeSpecification as "SysUpgrade Spec"
+        }
+
+        component HTTPHandler as "HTTP Handler"
+
+        HTTPHandler .down.> SpecificationRegistry: validates agents data with
+
+        HTTPHandler .right.> DataStore: saves agent data in
+    }
+}
+
+node OperatorNode as "Operator Node" {
+    component EmissaryClient as "Emissary Client"
+
+    EmissaryClient -left-> HTTPHandler: administrates
+}
+
+node OpenWRTNode as "OpenWRT Node" {
+    component EmissaryAgent as "Emissary Agent" {
+
+        component StateManager as "State Manager"
+
+        StateManager --up-> HTTPHandler: fetches agent ^*specs from
+
+        component UCIController as "UCI Controller"
+
+        UCIController .up.> StateManager: reconciles with
+
+        component SysUpgradeController as "SysUpgrade Controller"
+
+        SysUpgradeController .up.> StateManager: reconciles with
+    
+        component ProxyController as "Proxy Controller"
+
+        ProxyController .up.> StateManager: reconciles with
+
+        component MDNSController as "mDNS Controller"
+
+        MDNSController .up.> StateManager: reconciles with
+
+        component AppController as "App Controller"
+
+        AppController .up.> StateManager: reconciles with
+    }
+}
--- a/doc/fr/resources/overview.svg
+++ b/doc/fr/resources/overview.svg
@ -0,0 +1,99 @@
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+entity StateManager--><g id="elem_StateManager"><rect fill="#F1F1F1" height="49.0679" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="139" x="1048.5" y="392"/><rect fill="#F1F1F1" height="10" style="stroke:#181818;stroke-width:0.5;" width="15" x="1167.5" y="397"/><rect fill="#F1F1F1" height="2" style="stroke:#181818;stroke-width:0.5;" width="4" x="1165.5" y="399"/><rect fill="#F1F1F1" height="2" style="stroke:#181818;stroke-width:0.5;" width="4" x="1165.5" y="403"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="99" x="1063.5" y="426.9659">State Manager</text></g><!--MD5=[27f8877b35bcf78d2c9b0e363caea569]
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+entity AppController--><g id="elem_AppController"><rect fill="#F1F1F1" height="49.0679" rx="2.5" ry="2.5" style="stroke:#181818;stroke-width:0.5;" width="138" x="1518" y="537"/><rect fill="#F1F1F1" height="10" style="stroke:#181818;stroke-width:0.5;" width="15" x="1636" y="542"/><rect fill="#F1F1F1" height="2" style="stroke:#181818;stroke-width:0.5;" width="4" x="1634" y="544"/><rect fill="#F1F1F1" height="2" style="stroke:#181818;stroke-width:0.5;" width="4" x="1634" y="548"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacing" textLength="98" x="1533" y="571.9659">App Controller</text></g><!--MD5=[8c3501b26c9c3ea39952224ab3fba557]
+link HTTPHandler to SpecificationRegistry--><g id="link_HTTPHandler_SpecificationRegistry"><path d="M334.7,128 C268.96,128 178,128 178,128 C178,128 178,158.5475 178,190.5263 C178,190.7761 178,191.026 178,191.276 " fill="none" id="HTTPHandler-to-SpecificationRegistry" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="178,191.276,182,182.276,178,186.276,174,182.276,178,191.276" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="156" x="151.03" y="142.897">validates agents data with</text></g><!--MD5=[1442fca2dc2f53bf9ae23d9e844c6c8b]
+link HTTPHandler to DataStore--><g id="link_HTTPHandler_DataStore"><path d="M334.65,112 C334.65,112 128.41,112 128.41,112 " fill="none" id="HTTPHandler-to-DataStore" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="123.41,112,132.41,116,128.41,112,132.41,108,123.41,112" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="115" x="203.28" y="126.897">saves agent data in</text></g><!--MD5=[04b946759b53ef2d0699bda61eed296c]
+reverse link HTTPHandler to EmissaryClient--><g id="link_HTTPHandler_EmissaryClient"><path d="M473.28,112 C473.28,112 725.14,112 725.14,112 " fill="none" id="HTTPHandler-backto-EmissaryClient" style="stroke:#181818;stroke-width:1.0;"/><polygon fill="#181818" points="468.28,112,477.28,116,473.28,112,477.28,108,468.28,112" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="82" x="516.21" y="107.897">administrates</text></g><!--MD5=[0dd7156c6052ea784bc88dfca61e007b]
+reverse link HTTPHandler to StateManager--><g id="link_HTTPHandler_StateManager"><path d="M473.28,128 C473.28,128 665,128 665,128 C665,128 665,409 665,409 C665,409 921.14,409 1048.21,409 " fill="none" id="HTTPHandler-backto-StateManager" style="stroke:#181818;stroke-width:1.0;"/><polygon fill="#181818" points="468.28,128,477.28,132,473.28,128,477.28,124,468.28,128" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="163" x="501" y="360.137">fetches agent ^*specs from</text></g><!--MD5=[beea302d68a5d9dc6027ab4e0b987cea]
+reverse link StateManager to UCIController--><g id="link_StateManager_UCIController"><path d="M1042.15,425 C1042.15,425 876.5,425 876.5,425 C876.5,425 876.5,497.45 876.5,536.78 " fill="none" id="StateManager-backto-UCIController" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="1047.15,425,1038.15,421,1042.15,425,1038.15,429,1047.15,425" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="88" x="814.43" y="420.897">reconciles with</text></g><!--MD5=[8cf138a1950decb1251fc88353171770]
+reverse link StateManager to SysUpgradeController--><g id="link_StateManager_SysUpgradeController"><path d="M1080.25,447.43 C1080.25,447.43 1080.25,536.9 1080.25,536.9 " fill="none" id="StateManager-backto-SysUpgradeController" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="1080.25,442.43,1076.25,451.43,1080.25,447.43,1084.25,451.43,1080.25,442.43" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="88" x="991.25" y="488.057">reconciles with</text></g><!--MD5=[8dba0e44c0268b5c6a2c1c6565c41b8b]
+reverse link StateManager to ProxyController--><g id="link_StateManager_ProxyController"><path d="M1167.5,447.43 C1167.5,447.43 1167.5,536.9 1167.5,536.9 " fill="none" id="StateManager-backto-ProxyController" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="1167.5,442.43,1163.5,451.43,1167.5,447.43,1171.5,451.43,1167.5,442.43" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="88" x="1078.5" y="507.057">reconciles with</text></g><!--MD5=[94df0ade1dc92be8853ce902c4f83dad]
+reverse link StateManager to MDNSController--><g id="link_StateManager_MDNSController"><path d="M1193.72,425 C1193.72,425 1406,425 1406,425 C1406,425 1406,497.45 1406,536.78 " fill="none" id="StateManager-backto-MDNSController" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="1188.72,425,1197.72,429,1193.72,425,1197.72,421,1188.72,425" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="88" x="1266.75" y="420.897">reconciles with</text></g><!--MD5=[e74434bc519cba41fdddc7c857699717]
+reverse link StateManager to AppController--><g id="link_StateManager_AppController"><path d="M1193.96,409 C1193.96,409 1587,409 1587,409 C1587,409 1587,493.45 1587,536.66 " fill="none" id="StateManager-backto-AppController" style="stroke:#181818;stroke-width:1.0;stroke-dasharray:7.0,7.0;"/><polygon fill="#181818" points="1188.96,409,1197.96,413,1193.96,409,1197.96,405,1188.96,409" style="stroke:#181818;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="88" x="1365.31" y="404.897">reconciles with</text></g><!--MD5=[6fc50b732d8962c26a79ff20e99a40e3]
+@startuml
+top to bottom direction
+skinparam linetype ortho
+
+node PilotNode as "Pilot Node" {
+    database DataStore as "Data Store"
+
+    component EmissaryServer as "Emissary Server" {
+
+        component SpecificationRegistry as "Specification Registry" {
+            component UCISpecification as "UCI Spec"
+            component MDNSSpecification as "mDNS Spec"
+            component AppSpecification as "App Spec"
+            component ProxySpecification as "Proxy Spec"
+            component SysUpgradeSpecification as "SysUpgrade Spec"
+        }
+
+        component HTTPHandler as "HTTP Handler"
+
+        HTTPHandler .down.> SpecificationRegistry: validates agents data with
+
+        HTTPHandler .right.> DataStore: saves agent data in
+    }
+}
+
+node OperatorNode as "Operator Node" {
+    component EmissaryClient as "Emissary Client"
+
+    EmissaryClient -left-> HTTPHandler: administrates
+}
+
+node OpenWRTNode as "OpenWRT Node" {
+    component EmissaryAgent as "Emissary Agent" {
+
+        component StateManager as "State Manager"
+
+        StateManager - -up-> HTTPHandler: fetches agent ^*specs from
+
+        component UCIController as "UCI Controller"
+
+        UCIController .up.> StateManager: reconciles with
+
+        component SysUpgradeController as "SysUpgrade Controller"
+
+        SysUpgradeController .up.> StateManager: reconciles with
+    
+        component ProxyController as "Proxy Controller"
+
+        ProxyController .up.> StateManager: reconciles with
+
+        component MDNSController as "mDNS Controller"
+
+        MDNSController .up.> StateManager: reconciles with
+
+        component AppController as "App Controller"
+
+        AppController .up.> StateManager: reconciles with
+    }
+}
+@end
+
+PlantUML version 1.2022.7(Mon Aug 22 19:01:30 CEST 2022)
+(GPL source distribution)
+Java Runtime: OpenJDK Runtime Environment
+JVM: OpenJDK 64-Bit Server VM
+Default Encoding: UTF-8
+Language: fr
+Country: FR
+--></g></svg>