Breaking-Change: generate-pvc now needs a config.

introduced storage-size & storage-class-name

project-cljs.clj

@@ -1,4 +1,4 @@
-(defproject org.domaindrivenarchitecture/c4k-common-cljs "1.0.1-SNAPSHOT"
+(defproject org.domaindrivenarchitecture/c4k-common-cljs "1.1.0-SNAPSHOT"
   :description "Contains predicates and tools for c4k"
   :url "https://domaindrivenarchitecture.org"
   :license {:name "Apache License, Version 2.0"

project.clj

@@ -1,4 +1,4 @@
-(defproject org.domaindrivenarchitecture/c4k-common-clj "1.0.1-SNAPSHOT"
+(defproject org.domaindrivenarchitecture/c4k-common-clj "1.1.0-SNAPSHOT"
   :description "Contains predicates and tools for c4k"
   :url "https://domaindrivenarchitecture.org"
   :license {:name "Apache License, Version 2.0"

src/main/cljc/dda/c4k_common/common.cljc

@@ -1,6 +1,7 @@
 (ns dda.c4k-common.common
   (:require
    [clojure.walk]
+   [clojure.spec.alpha :as s]
    #?(:clj [orchestra.core :refer [defn-spec]]
       :cljs [orchestra.core :refer-macros [defn-spec]])
    [dda.c4k-common.predicate :as cp]))
@@ -50,3 +51,8 @@
                             value-to-replace
                             %) 
                          coll))
+
+(defn-spec concat-vec vector?
+  [& vs (s/* seq?)]
+  (into []
+        (apply concat vs)))

src/main/cljc/dda/c4k_common/postgres.cljc

@@ -22,8 +22,11 @@
 (s/def ::postgres-data-volume-path string?)
 (s/def ::postgres-size postgres-size?)
 (s/def ::db-name cp/bash-env-string?)
+(s/def ::pvc-storage-class-name cp/pvc-storage-class-name?)
+(s/def ::pv-storage-size-gb pos?)
 (defn pg-config? [input]
-  (s/keys :opt-un [::postgres-size ::db-name ::postgres-data-volume-path]))
+  (s/keys :opt-un [::postgres-size ::db-name ::postgres-data-volume-path 
+                   ::pvc-storage-class-name ::pv-storage-size-gb]))
 (defn pg-auth? [input]
   (s/keys :opt-un [::postgres-db-user ::postgres-db-password]))
 
@@ -53,7 +56,7 @@
                         (str "postgres/config-" (name postgres-size) ".yaml")))
      (assoc-in [:data :postgres-db] db-name))))
 
-
+; TODO: why do we need a sequence of configs?
 (defn-spec generate-deployment cp/map-or-seq?
   [& config (s/? pg-config?)]
   (let [{:keys [postgres-image]
@@ -64,14 +67,23 @@
 
 (defn-spec generate-persistent-volume cp/map-or-seq?
   [config pg-config?]
-  (let [{:keys [postgres-data-volume-path]} config]
+  (let [{:keys [postgres-data-volume-path pv-storage-size-gb] 
+         :or {postgres-data-volume-path "/var/postgres"
+              pv-storage-size-gb 10}} config]
     (->
      (yaml/from-string (yaml/load-resource "postgres/persistent-volume.yaml"))
-     (assoc-in [:spec :hostPath :path] postgres-data-volume-path))))
+     (assoc-in [:spec :hostPath :path] postgres-data-volume-path)
+     (assoc-in [:spec :capacity :storage] (str pv-storage-size-gb "Gi")))))
 
 (defn-spec generate-pvc cp/map-or-seq? 
-  []
+  [config pg-config?]
-  (yaml/from-string (yaml/load-resource "postgres/pvc.yaml")))
+  (let [{:keys [pv-storage-size-gb pvc-storage-class-name] 
+         :or {pv-storage-size-gb 10
+              pvc-storage-class-name :manual}} config]
+  (-> 
+   (yaml/from-string (yaml/load-resource "postgres/pvc.yaml"))
+   (assoc-in [:spec :resources :requests :storage] (str pv-storage-size-gb "Gi"))
+   (assoc-in [:spec :storageClassName] (name pvc-storage-class-name)))))
 
 (defn-spec generate-secret cp/map-or-seq? 
   [my-auth any?]

src/main/cljc/dda/c4k_common/predicate.cljc

@@ -17,3 +17,7 @@
 (defn map-or-seq?
   [input]
   (or (map? input) (seq? input)))
+
+(defn pvc-storage-class-name?
+  [input]
+  (contains? #{:manual :local-path} input))

src/main/resources/postgres/pvc.yaml

@@ -5,9 +5,9 @@ metadata:
   labels:
     app: postgres
 spec:
-  storageClassName: manual
+  storageClassName: REPLACEME
   accessModes:
     - ReadWriteOnce
   resources:
     requests:
-      storage: 10Gi
+      storage: REPLACEME

src/test/cljc/dda/c4k_common/postgres_test.cljc

@@ -37,7 +37,39 @@
            :accessModes ["ReadWriteOnce"]
            :capacity {:storage "10Gi"}
            :hostPath {:path "xx"}}}
-         (cut/generate-persistent-volume {:postgres-data-volume-path "xx"}))))
+         (cut/generate-persistent-volume {:postgres-data-volume-path "xx"})))
+  (is (= {:kind "PersistentVolume"
+          :apiVersion "v1"
+          :metadata
+          {:name "postgres-pv-volume", :labels {:type "local"}}
+          :spec
+          {:storageClassName "manual"
+           :accessModes ["ReadWriteOnce"]
+           :capacity {:storage "20Gi"}
+           :hostPath {:path "xx"}}}
+         (cut/generate-persistent-volume {:postgres-data-volume-path "xx"
+                                          :pv-storage-size-gb 20}))))
+
+(deftest should-generate-persistent-volume-claim
+  (is (= {:apiVersion "v1"
+          :kind "PersistentVolumeClaim"
+          :metadata
+          {:name "postgres-claim", :labels {:app "postgres"}}
+          :spec
+          {:storageClassName "manual"
+           :accessModes ["ReadWriteOnce"]
+           :resources {:requests {:storage "10Gi"}}}}
+         (cut/generate-pvc {})))
+  (is (= {:apiVersion "v1"
+          :kind "PersistentVolumeClaim"
+          :metadata
+          {:name "postgres-claim", :labels {:app "postgres"}}
+          :spec
+          {:storageClassName "local-path"
+           :accessModes ["ReadWriteOnce"]
+           :resources {:requests {:storage "20Gi"}}}}
+         (cut/generate-pvc {:pv-storage-size-gb 20
+                            :pvc-storage-class-name :local-path}))))
 
 (deftest should-generate-secret
   (is (= {:apiVersion "v1"