feat(matilda): administración de servidores — core + config + plan

matilda-core: modelo declarativo (Host, Container, VHost, Inventory). matilda-config: renderiza Container→docker-compose/docker run y VHost→bloque server nginx (con TLS + redirección :80→:443). matilda-plan: reconciliación pura actual→deseado con acciones ordenadas por dependencia (contenedores antes que vhosts, removes en orden inverso). Demo CLI en apps/matilda. 29 tests. Funciones puras, cero Docker/SSH/disco. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 17:06:36 +00:00
parent 71f6cf1306
commit 3f8a3ea4b6
18 changed files with 1190 additions and 0 deletions
@@ -0,0 +1,268 @@
+//! `matilda-plan` — reconciliación de estado deseado vs actual.
+//!
+//! Dado el inventario *actual* de un servidor y el inventario *deseado*,
+//! produce la lista de [`Action`]s que lo lleva de uno al otro. El orden
+//! respeta las dependencias:
+//!
+//! 1. crear/actualizar hosts;
+//! 2. crear/actualizar contenedores (los vhosts dependen de ellos);
+//! 3. crear/actualizar vhosts;
+//! 4. eliminar vhosts (antes que sus contenedores);
+//! 5. eliminar contenedores;
+//! 6. eliminar hosts.
+//!
+//! Es una función pura y determinista — el mismo par de inventarios da
+//! siempre el mismo plan. Aplicarlo (Docker, nginx, SSH) es trabajo de
+//! capas superiores.
+
+#![forbid(unsafe_code)]
+
+use matilda_core::Inventory;
+use serde::{Deserialize, Serialize};
+
+/// El tipo de recurso sobre el que opera una acción.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum Resource {
+    Host,
+    Container,
+    VHost,
+}
+
+impl Resource {
+    fn label(self) -> &'static str {
+        match self {
+            Resource::Host => "host",
+            Resource::Container => "contenedor",
+            Resource::VHost => "vhost",
+        }
+    }
+}
+
+/// La operación de una acción.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum Op {
+    Create,
+    Update,
+    Remove,
+}
+
+impl Op {
+    fn verb(self) -> &'static str {
+        match self {
+            Op::Create => "crear",
+            Op::Update => "actualizar",
+            Op::Remove => "eliminar",
+        }
+    }
+}
+
+/// Una acción del plan: operar sobre un recurso identificado por nombre.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Action {
+    pub op: Op,
+    pub resource: Resource,
+    /// Nombre del recurso — `name` del host/contenedor, `domain` del vhost.
+    pub name: String,
+}
+
+impl Action {
+    fn new(op: Op, resource: Resource, name: impl Into<String>) -> Self {
+        Self { op, resource, name: name.into() }
+    }
+
+    /// Descripción legible — `"crear contenedor «web»"`.
+    pub fn describe(&self) -> String {
+        format!("{} {} «{}»", self.op.verb(), self.resource.label(), self.name)
+    }
+}
+
+/// El plan de reconciliación: acciones en orden de aplicación.
+#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Plan {
+    pub actions: Vec<Action>,
+}
+
+impl Plan {
+    /// `true` si no hay nada que cambiar — los inventarios ya coinciden.
+    pub fn is_empty(&self) -> bool {
+        self.actions.is_empty()
+    }
+
+    /// Cantidad de acciones.
+    pub fn len(&self) -> usize {
+        self.actions.len()
+    }
+
+    /// Cuenta las acciones de una operación dada.
+    pub fn count(&self, op: Op) -> usize {
+        self.actions.iter().filter(|a| a.op == op).count()
+    }
+}
+
+/// Calcula el plan que lleva de `current` a `desired`.
+pub fn plan(current: &Inventory, desired: &Inventory) -> Plan {
+    let mut actions: Vec<Action> = Vec::new();
+
+    // --- Fase 1: hosts a crear/actualizar ---
+    for h in desired.hosts() {
+        match current.host(&h.name) {
+            None => actions.push(Action::new(Op::Create, Resource::Host, &h.name)),
+            Some(cur) if cur != h => {
+                actions.push(Action::new(Op::Update, Resource::Host, &h.name))
+            }
+            Some(_) => {}
+        }
+    }
+
+    // --- Fase 2: contenedores a crear/actualizar ---
+    for c in desired.containers() {
+        match current.container(&c.name) {
+            None => actions.push(Action::new(Op::Create, Resource::Container, &c.name)),
+            Some(cur) if cur != c => {
+                actions.push(Action::new(Op::Update, Resource::Container, &c.name))
+            }
+            Some(_) => {}
+        }
+    }
+
+    // --- Fase 3: vhosts a crear/actualizar ---
+    for v in desired.vhosts() {
+        match current.vhost(&v.domain) {
+            None => actions.push(Action::new(Op::Create, Resource::VHost, &v.domain)),
+            Some(cur) if cur != v => {
+                actions.push(Action::new(Op::Update, Resource::VHost, &v.domain))
+            }
+            Some(_) => {}
+        }
+    }
+
+    // --- Fase 4: vhosts a eliminar (antes que sus contenedores) ---
+    for v in current.vhosts() {
+        if desired.vhost(&v.domain).is_none() {
+            actions.push(Action::new(Op::Remove, Resource::VHost, &v.domain));
+        }
+    }
+
+    // --- Fase 5: contenedores a eliminar ---
+    for c in current.containers() {
+        if desired.container(&c.name).is_none() {
+            actions.push(Action::new(Op::Remove, Resource::Container, &c.name));
+        }
+    }
+
+    // --- Fase 6: hosts a eliminar ---
+    for h in current.hosts() {
+        if desired.host(&h.name).is_none() {
+            actions.push(Action::new(Op::Remove, Resource::Host, &h.name));
+        }
+    }
+
+    Plan { actions }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use matilda_core::{Container, Host, VHost};
+
+    #[test]
+    fn empty_to_empty_is_a_noop() {
+        let p = plan(&Inventory::new(), &Inventory::new());
+        assert!(p.is_empty());
+    }
+
+    #[test]
+    fn fresh_inventory_is_all_creates() {
+        let mut desired = Inventory::new();
+        desired.add_host(Host::new("edge", "10.0.0.1"));
+        desired.add_container(Container::new("web", "nginx"));
+        desired.add_vhost(VHost::to_container("site.com", "web", 80));
+        let p = plan(&Inventory::new(), &desired);
+        assert_eq!(p.count(Op::Create), 3);
+        assert_eq!(p.count(Op::Remove), 0);
+    }
+
+    #[test]
+    fn unchanged_inventory_yields_no_actions() {
+        let mut inv = Inventory::new();
+        inv.add_container(Container::new("web", "nginx:1.27"));
+        let p = plan(&inv, &inv.clone());
+        assert!(p.is_empty());
+    }
+
+    #[test]
+    fn changed_image_is_an_update() {
+        let mut current = Inventory::new();
+        current.add_container(Container::new("web", "nginx:1.26"));
+        let mut desired = Inventory::new();
+        desired.add_container(Container::new("web", "nginx:1.27"));
+        let p = plan(&current, &desired);
+        assert_eq!(p.actions, vec![Action::new(Op::Update, Resource::Container, "web")]);
+    }
+
+    #[test]
+    fn dropped_resources_become_removes() {
+        let mut current = Inventory::new();
+        current.add_container(Container::new("old", "img"));
+        current.add_vhost(VHost::to_container("old.com", "old", 80));
+        let p = plan(&current, &Inventory::new());
+        assert_eq!(p.count(Op::Remove), 2);
+    }
+
+    #[test]
+    fn vhost_removal_precedes_container_removal() {
+        // Un vhost debe eliminarse antes que el contenedor que lo sirve.
+        let mut current = Inventory::new();
+        current.add_container(Container::new("web", "nginx"));
+        current.add_vhost(VHost::to_container("site.com", "web", 80));
+        let p = plan(&current, &Inventory::new());
+        let vhost_pos = p
+            .actions
+            .iter()
+            .position(|a| a.resource == Resource::VHost)
+            .unwrap();
+        let cont_pos = p
+            .actions
+            .iter()
+            .position(|a| a.resource == Resource::Container)
+            .unwrap();
+        assert!(vhost_pos < cont_pos);
+    }
+
+    #[test]
+    fn container_creation_precedes_vhost_creation() {
+        let mut desired = Inventory::new();
+        desired.add_container(Container::new("web", "nginx"));
+        desired.add_vhost(VHost::to_container("site.com", "web", 80));
+        let p = plan(&Inventory::new(), &desired);
+        let cont_pos = p
+            .actions
+            .iter()
+            .position(|a| a.resource == Resource::Container)
+            .unwrap();
+        let vhost_pos = p
+            .actions
+            .iter()
+            .position(|a| a.resource == Resource::VHost)
+            .unwrap();
+        assert!(cont_pos < vhost_pos);
+    }
+
+    #[test]
+    fn plan_is_deterministic() {
+        let mut current = Inventory::new();
+        current.add_container(Container::new("a", "img:1"));
+        let mut desired = Inventory::new();
+        desired.add_container(Container::new("a", "img:2"));
+        desired.add_container(Container::new("b", "img:1"));
+        assert_eq!(plan(&current, &desired), plan(&current, &desired));
+    }
+
+    #[test]
+    fn describe_is_human_readable() {
+        let a = Action::new(Op::Create, Resource::Container, "web");
+        assert_eq!(a.describe(), "crear contenedor «web»");
+    }
+}