Fix systemd unit file for mongodb and add manage limits.

defaults/main.yml

@@ -16,6 +16,8 @@ mongodb_pymongo_pip_version: 3.7.1
 mongodb_user_update_password: "on_create"        # MongoDB user password update default policy
 mongodb_manage_service: true
 mongodb_manage_systemd_unit: true
+mongodb_systemd_unit_limit_nofile: 64000
+mongodb_systemd_unit_limit_nproc: 64000
 
 mongodb_disable_transparent_hugepages: false
 

tasks/install.debian.yml

@@ -59,8 +59,8 @@
     state: present
 
 - name: Add systemd configuration if present
-  copy:
+  template:
-    src: mongodb.service
+    src: mongodb.service.j2
     dest: "/lib/systemd/system/{{mongodb_daemon_name}}.service"
     owner: root
     group: root

templates/mongodb.service.j2

@@ -1,9 +1,10 @@
+# {{ ansible_managed }}
 [Unit]
 Description=An object/document-oriented database
 Documentation=man:mongod(1)
 
 [Service]
-User=mongodb
+User={{ mongodb_user }}
 ExecStart=/usr/bin/numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf
 # file size
 LimitFSIZE=infinity
@@ -12,9 +13,9 @@ LimitCPU=infinity
 # virtual memory size
 LimitAS=infinity
 # open files
-LimitNOFILE=64000
+LimitNOFILE={{ mongodb_systemd_unit_limit_nofile }}
 # processes/threads
-LimitNPROC=64000
+LimitNPROC={{ mongodb_systemd_unit_limit_nproc }}
 # locked memory
 LimitMEMLOCK=infinity
 # total threads (user+kernel)