From 0b50bcc867a0bd38ad7e69157d244bfed29e2c8c Mon Sep 17 00:00:00 2001
From: Mikhail Konyakhin <m.konyahin@gmail.com>
Date: Mon, 25 Nov 2019 14:23:54 +0300
Subject: [PATCH] Fix systemd unit file for mongodb and add manage limits.

---
 defaults/main.yml                                     | 2 ++
 tasks/install.debian.yml                              | 4 ++--
 files/mongodb.service => templates/mongodb.service.j2 | 7 ++++---
 3 files changed, 8 insertions(+), 5 deletions(-)
 rename files/mongodb.service => templates/mongodb.service.j2 (79%)

diff --git a/defaults/main.yml b/defaults/main.yml
index be3b175..b5d1bd5 100644
--- a/defaults/main.yml
+++ b/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
 
diff --git a/tasks/install.debian.yml b/tasks/install.debian.yml
index 826aea9..2d78dd4 100644
--- a/tasks/install.debian.yml
+++ b/tasks/install.debian.yml
@@ -59,8 +59,8 @@
     state: present
 
 - name: Add systemd configuration if present
-  copy:
-    src: mongodb.service
+  template:
+    src: mongodb.service.j2
     dest: "/lib/systemd/system/{{mongodb_daemon_name}}.service"
     owner: root
     group: root
diff --git a/files/mongodb.service b/templates/mongodb.service.j2
similarity index 79%
rename from files/mongodb.service
rename to templates/mongodb.service.j2
index ea90f2d..ce37667 100644
--- a/files/mongodb.service
+++ b/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)