Add jmespath/jinja2 precheck and pump parameters (#807)

* Add jmespath and jinja2 precheck (#802)

* Add parameters to pump config (#805)

conf/pump.yml

@@ -22,3 +22,8 @@ security:
 storage:
   # Set to true (by default) to guarantee reliability by ensuring binlog data is flushed to the disk.
   # sync-log: true
+
+  # stop write when disk available space less than the configured size
+  # 42 MB -> 42000000, 42 mib -> 44040192
+  # default: 10 gib
+  # stop-write-at-available-space = "10 gib"

roles/check_system_static/tasks/main.yml

@@ -64,3 +64,42 @@
   fail:
     msg: "It is not recommended to set vm.overcommit_memory to 2, set it to 0 or 1."
   when: vm_overcommit_memory.stdout | int == 2
+
+- name: Check ansible version
+  fail:
+    msg: "Stop if ansible version is too low, make sure that the Ansible version is 2.4.2 or later, otherwise a compatibility issue occurs. Current ansible version is {{ ansible_version.full }}"
+  when: ansible_version.full | version_compare('2.4.2', '<')
+
+- name: Get if jmespath info[1]
+  shell: pip list | grep -iw jmespath | wc -l
+  register: jmespath_exist
+
+- name: Get if jinja2 exist[1]
+  shell: pip list | grep -iw jinja2 | wc -l
+  register: jinja2_exist
+
+- name: Preflight check - Fail when jmespath or jinja2 doesn't exist
+  fail:
+    msg: "Jmespath or Jinja2 does not exist, Please run `pip install -r requirements.txt` to install."
+  when: jmespath_exist.stdout | int == 0 or jinja2_exist.stdout | int == 0
+
+- name: Get jmespath info[2]
+  shell: pip show jmespath | grep Version |grep -v Metadata-Version
+  register: jmespath
+
+- name: Get jmespath version
+  set_fact:
+    jmespath_version: "{{ jmespath.stdout_lines[0] | replace('Version: ', '') }}"
+
+- name: Get jinja2 info[2]
+  shell: pip show jinja2 | grep Version |grep -v Metadata-Version
+  register: jinja2
+
+- name: Get jinja2 version
+  set_fact:
+    jinja2_version: "{{ jinja2.stdout_lines[0] | replace('Version: ', '') }}"
+
+- name: Preflight check - Fail when the versions of jmespath and jinja2 doesn't meet the requirements
+  fail:
+    msg: "Jmespath({{ jmespath_version }}) or jinja2({{ jinja2_version }}) version is too low, Please run `pip install --upgrade -r requirements.txt` to upgrade."
+  when: jmespath_version | version_compare('0.9.0', '<') or jinja2_version | version_compare('2.9.6', '<')

roles/pump/vars/default.yml

@@ -22,3 +22,8 @@ security:
 storage:
   # Set to true (by default) to guarantee reliability by ensuring binlog data is flushed to the disk.
   # sync-log: true
+
+  # stop write when disk available space less than the configured size
+  # 42 MB -> 42000000, 42 mib -> 44040192
+  # default: 10 gib
+  # stop-write-at-available-space = "10 gib"