Support multiple cores via SOLR_CORES (#37)

Introduces the ability to support creating multiple Solr cores when
using Solr in standalone mode.

The Cores API will only support creating additional cores IF the core
data and configuration directories already exist.

This new environment variable SOLR_CORES supports a comma, semi-colon or space
separated list of cores to create at first run.

bitnami/solr/8/debian-10/rootfs/opt/bitnami/scripts/libsolr.sh

@@ -112,7 +112,7 @@ solr_validate() {
     ! is_yes_no_value "$SOLR_ENABLE_CLOUD_MODE" && print_validation_error "SOLR_ENABLE_CLOUD_MODE possible values are yes or no"
     is_boolean_yes "$SOLR_ENABLE_CLOUD_MODE" && [[ -z "$SOLR_ZK_HOSTS" ]] && print_validation_error "You need to provide the Zookeper node list in SOLR_ZK_HOSTS"
 
-    ! is_boolean_yes "$SOLR_CLOUD_BOOTSTRAP" && is_boolean_yes "$SOLR_ENABLE_CLOUD_MODE" && [[ -n "$SOLR_CORE" ]] && info "This node is not a boostrap node and will not create the collection"
+    ! is_boolean_yes "$SOLR_CLOUD_BOOTSTRAP" && is_boolean_yes "$SOLR_ENABLE_CLOUD_MODE" && [[ -n "$SOLR_CORES" ]] && info "This node is not a boostrap node and will not create the collection"
 
     ! is_true_false_value "$SOLR_SSL_CHECK_PEER_NAME" && print_validation_error "SOLR_SSL_CHECK_PEER_NAME possible values are true or false"
 
@@ -171,12 +171,11 @@ solr_wait_for_zookeeper() {
 # Globals:
 #   SOLR_*
 # Arguments:
-#   $1 - Core name
+#   None
 # Returns:
 #   None
 #########################
-solr_create_core() {
-    local -r core="${1:?Missing core}"
+solr_create_cores() {
     local -r exec="curl"
     local command_args=("--silent" "--fail")
     local protocol="http"
@@ -185,20 +184,24 @@ solr_create_core() {
 
     is_boolean_yes "$SOLR_ENABLE_AUTHENTICATION" && command_args+=("--user" "${SOLR_ADMIN_USERNAME}:${SOLR_ADMIN_PASSWORD}")
 
-    mkdir -p "${SOLR_SERVER_DIR}/solr/${core}/data"
-    mkdir -p "${SOLR_SERVER_DIR}/solr/${core}/conf"
-    cp -r "${SOLR_CORE_CONF_DIR}"/* "${SOLR_SERVER_DIR}/solr/${core}/conf/"
+    read -r -a cores <<< "$(tr ',;' ' ' <<< "${SOLR_CORES}")"
+    info "Creating cores..."
+    for core in "${cores[@]}"; do
+        mkdir -p "${SOLR_SERVER_DIR}/solr/${core}/data"
+        mkdir -p "${SOLR_SERVER_DIR}/solr/${core}/conf"
+        cp -r "${SOLR_CORE_CONF_DIR}"/* "${SOLR_SERVER_DIR}/solr/${core}/conf/"
 
-    command_args+=("${protocol}://localhost:${SOLR_PORT_NUMBER}/solr/admin/cores?action=CREATE&name=${core}&instanceDir=${core}&dataDir=data")
+        command_args+=("${protocol}://localhost:${SOLR_PORT_NUMBER}/solr/admin/cores?action=CREATE&name=${core}&instanceDir=${core}&dataDir=data")
 
-    info "Creating solr core: ${SOLR_CORE}"
+        info "Creating solr core: ${core}"
 
-    if ! debug_execute "$exec" "${command_args[@]}" >/dev/null; then
-        error "There was an error when creating the core"
-        exit 1
-    else
-        info "Core created"
-    fi
+        if ! debug_execute "$exec" "${command_args[@]}" >/dev/null; then
+            error "There was an error when creating the core"
+            exit 1
+        else
+            info "Core created"
+        fi
+    done
 }
 
 #########################
@@ -623,7 +626,7 @@ solr_initialize() {
 
             is_boolean_yes "$SOLR_ENABLE_AUTHENTICATION" && solr_update_password "$SOLR_ADMIN_USERNAME" "$SOLR_ADMIN_PASSWORD"
 
-            [[ -n "$SOLR_CORE" ]] && solr_create_core "$SOLR_CORE"
+            [[ -n "$SOLR_CORES" ]] && solr_create_cores
 
             solr_stop
         fi

bitnami/solr/8/debian-10/rootfs/opt/bitnami/scripts/solr-env.sh

@@ -27,7 +27,7 @@ solr_env_vars=(
     SOLR_HEAP
     SOLR_JAVA_MEM
     SOLR_PORT_NUMBER
-    SOLR_CORE
+    SOLR_CORES
     SOLR_COLLECTION
     SOLR_COLLECTION_REPLICAS
     SOLR_COLLECTION_SHARDS
@@ -77,7 +77,7 @@ export SOLR_HEAP="${SOLR_HEAP:-}"
 export SOLR_JAVA_MEM="${SOLR_JAVA_MEM:--Xms512m -Xmx512m}"
 export SOLR_PORT_NUMBER="${SOLR_PORT_NUMBER:-8983}"
 export SOLR_PID_FILE="${SOLR_PID_DIR}/solr-${SOLR_PORT_NUMBER}.pid"
-export SOLR_CORE="${SOLR_CORE:-}"
+export SOLR_CORES="${SOLR_CORES:-}"
 SOLR_COLLECTION="${SOLR_COLLECTION:-"${SOLR_COLLECTION:-}"}"
 export SOLR_COLLECTION="${SOLR_COLLECTION:-}"
 export SOLR_COLLECTION_REPLICAS="${SOLR_COLLECTION_REPLICAS:-1}"

bitnami/solr/README.md

@@ -150,7 +150,7 @@ When you start the solr image, you can adjust the configuration of the instance
 
 - `SOLR_PORT_NUMBER`: Port used by Solr server. Default: **8983**
 - `SOLR_SERVER_DIR`: Specify the Solr server directory. Default: **/opt/bitnami/solr/server**
-- `SOLR_CORE`: Core name to create at first run. By default, it will not create a core. (E.g.: '**my_core**')
+- `SOLR_CORES`: Comma, semi-colon or space separated list of cores to create at first run. By default, it will not create a core. (E.g.: '**my_dev_core,my_test_core**')
 - `SOLR_CORE_CONF_DIR`: Configuration directory to copy when creating a new core. Default: **data_driven_schema_configs**
 
 Cluster related environment variables:
@@ -186,14 +186,14 @@ This requires a minor change to the [`docker-compose.yml`](https://github.com/bi
 solr:
   ...
   environment:
-    - SOLR_CORE=my_core
+    - SOLR_CORES=my_core
   ...
 ```
 
 ### Specifying Environment Variables on the Docker command line
 
 ```console
-$ docker run -d -e SOLR_CORE=my_core --name solr bitnami/solr:latest
+$ docker run -d -e SOLR_CORES=my_core --name solr bitnami/solr:latest
 ```
 
 ## Using your Apache Solr Cores configuration files