ansible jinja2 template file creation based on input values - templates

Question

i want to create a file application.properties file and copy it over to specific location. im using template module for same. but i want to create content of the file based on comma separated input ip addresses count/values
the content of the file should is below.
conf_pg_hba_replication.connection=host replication oracle {{IP1}}/32 trust\nhost replication oracle {{IP2}}/32 trust\nhost replication oracle {{IP3}}/32.............
so i want my file to be created with dynamic content based on comma separated input ip address value.
if my input ip value is 127.0.0.1,123.123.123.123
file content should be
conf_pg_hba_replication.connection=host replication oracle 127.0.0.1/32 trust\nhost replication oracle 123.123.123.123/32 trust
so likewise i need to create contents of file.
please help me on this.
---
- name: pp
hosts: localhost
tasks:
- name: pp
template:
src: pp.j2
dest: pp.properties
newline_sequence: \n
-bash-4.2$ cat pp.j2
conf_pg_hba_replication.connection=host replication oracle {{slave_ip}}/32 trust
i pass ips list through a variable to ansible playbook like below
ansible-playbook postgres.yml -e "ips_list=ip1,ip2,ip3"

Answer 1

You are passing a coma separated ip list as an extra var on the ansible command line.
To acheive your requirement you need to:
transform the string containing the coma separated list to a real list with the split function.
loop over you list in your template to output the result.
This can actually be done in a single task. Given the following templates/pp.j2...
{% for slave_ip in ip_list %}
conf_pg_hba_replication.connection=host replication oracle {{ slave_ip }}/32 trust
{% endfor %}
and the following playbook...
---
- name: template our pp file
hosts: localhost
gather_facts: false
tasks:
- name: pp
template:
src: pp.j2
dest: pp.properties
vars:
ip_list: "{{ ip_list_raw.split(',') }}"
that you call like this...
ansible-playbook test.yml -e "ip_list_raw=127.0.0.1,1.2.3.4,5.6.7.8"
you get the following result
$ cat pp.properties
conf_pg_hba_replication.connection=host replication oracle 127.0.0.1/32 trust
conf_pg_hba_replication.connection=host replication oracle 1.2.3.4/32 trust
conf_pg_hba_replication.connection=host replication oracle 5.6.7.8/32 trust
Note that you can also drop the vars declaration with the split in the template task by passing directly the list of ips as a json array on the command line
ansible-playbook test.yml -e '{"ip_list":["127.0.0.1","1.2.3.4","5.6.7.8"]}'
Or even load them from an external yaml file e.g. my_ip_list.yml
---
ip_list:
- 127.0.0.1
- 1.2.3.4
- 5.6.7.8
like this:
ansible-playbook test.yml -e #my_ip_list.yml'

Answer 2

---
- name: check for postgresql standby
command: "{{ service }} postgres-check-standby"
ignore_errors: yes
register: check_standby
- set_fact:
is_standby: "N"
when:
- '"Error: Cannot get status of postgres server" in check_standby.stdout or "Error: Postgres-Server reports being" in check_standby.stdout'
- '" pg_last_xlog_receive_location \n-------------------------------\n \n(1 row)" in check_standby.stdout'
- set_fact:
is_standby: "Y"
when:
- '"postgres-server is slave/standby" in check_standby.stdout or "Error: Cannot get status of postgres server" in check_standby.stdout'
- '" pg_last_xlog_receive_location \n-------------------------------\n \n(1 row)" not in check_standby.stdout'
- set_fact:
is_standby: "D"
when:
- '"ERROR: postgres server is down or does not seem be standby" in check_standby.stdout'
- '"Is the server running locally and accepting" in check_standby.stderr'
- name: print if standby
command: echo "postgres-server is slave/standby"
when: is_standby == "Y"
- name: print if not standby
command: echo "postgres-server is not slave/standby"
when: is_standby == "N"
- name: print if component is down
command: echo "postgresql component is down"
when: is_standby == "D"
---
- name: check for postgresql master
command: "{{ service }} postgres-check-master"
ignore_errors: yes
register: check_master
- set_fact:
is_master: "Y"
when:
- '" pg_current_xlog_location \n--------------------------\n \n(1 row)" not in check_master.stdout'
- '"postgres-server is master" in check_master.stdout or "Cannot get status of postgres server" in check_master.stdout'
- set_fact:
is_master: "N"
when:
- '"postgres server is down or does not seem be" in check_master.stdout'
- '"ERROR: recovery is in progress" in check_master.stderr'
- set_fact:
is_master: "D"
when:
- '"postgres server is down or does not seem be" in check_master.stdout'
- '"Is the server running locally and accepting" in check_master.stderr'
- name: print if master
command: echo "postgres-server is master"
when: is_master == "Y"
- name: print if not master
command: echo "postgres-server is not master"
when: is_master == "N"
- name: print if component is down
command: echo "postgresql component is down"
when: is_master == "D"
---
- name: check postgresql status
command: "{{ service }} status"
ignore_errors: yes
register: postgresql_status
- name: start if its down
command: "{{ service }} start"
when:
- 'postgresql_status is failed or postgresql_status.rc != 0 or "apigee-service: apigee-postgresql: OK" not in postgresql_status.stderr'
- name: validate it is a standby node
include: check_standby.yml
- fail:
msg: postgres-server is not standby or down - please check"
when: is_standby != "Y"
- name: get ip address of old_master
shell: host {{OLD_MASTER_FQDN}} | awk -F"has address " '{print$2}'
ignore_errors: yes
register: old_master_ip
- name: get no of octet in ip address
shell: echo {{old_master_ip.stdout}} | sed s'/\./ /g' | wc -w
ignore_errors: yes
register: ip_octet_count
- name: echo old_master_ip
command: echo Old Master Node Ip address:- {{old_master_ip.stdout}}
when: old_master_ip.stdout != "" and ip_octet_count.stdout == "4"
- name: fail if unable to get ip address
fail:
msg: failed to get the ip address, please check and enter FQDN of old master postgres node
when: old_master_ip.stdout == "" or ip_octet_count.stdout != "4"
- name: Switching standby to master
shell: "{{ service}} promote-standby-to-master {{old_master_ip.stdout}}"
- name: validate master post swap
include: check_master.yml
- fail:
msg: postgresql is not master. please check microservice logs for error details.
when: is_master != "Y"
- name: backup existing file
command: "mv {{properties_file}} {{properties_file}}_backup{{ansible_date_time.date}}"
when: postgres_properties_file.stat.exists
- name: download properties file from Bitbucket
shell: "curl -k -v -u {{ username }}:{{ passwd }} {{POSTGRESQL_PROPERTIES_BB_URL}}?raw -o {{properties_file}}"
args:
warn: no
- name: restart postgresql component
command: "{{ service }} restart"
- name: print Outcome
command: echo "Successfully converted postgresql slave to master"
---
- name: check whether node is master node
include: check_master.yml
- name: bring down node if master is up and running
command: "{{ service }} stop"
when: is_master != "D"
- name: get ip address of new_master
shell: host {{NEW_MASTER_FQDN}} | awk -F"has address " '{print$2}'
ignore_errors: yes
register: new_master_ip
- name: get slave ip
shell: hostname -i
ignore_errors: yes
register: slave_ip
- name: get no of octet in slave ip address
shell: echo {{slave_ip.stdout}} | sed s'/\./ /g' | wc -w
ignore_errors: yes
register: slave_ip_octet_count
- name: get no of octet in new master ip address
shell: echo {{new_master_ip.stdout}} | sed s'/\./ /g' | wc -w
ignore_errors: yes
register: ip_octet_count_m
- name: echo new_master_ip and slave ip
command: "{{ item }}"
with_items:
- echo New Master Node Ip address:- {{new_master_ip.stdout}}
- echo Slave Ip address:- {{slave_ip.stdout}}
when: new_master_ip.stdout != "" and ip_octet_count_m.stdout == "4" and slave_ip.stdout != "" and slave_ip_octet_count.stdout == "4"
- name: fail if unable to get ip address
fail:
msg: failed to get the ip addresses, please check and enter FQDN of postgresql node
when: new_master_ip.stdout == "" or ip_octet_count_m.stdout != "4" or slave_ip.stdout == "" or slave_ip_octet_count.stdout != "4"
- name: create temp replication config file
copy:
dest: /tmp/setup_replication.txt
content: |
PG_MASTER={{new_master_ip.stdout}}
PG_STANDBY={{slave_ip.stdout}}
mode: 0750
- name: comment out the conf_pg_hba_replication.connection property in postgresql properties file
replace:
path: "{{properties_file}}"
regexp: 'conf_pg_hba_replication.connection='
replace: '#conf_pg_hba_replication.connection='
backup: yes
when: postgres_properties_file.stat.exists
- name: remove data folder
file:
path: /opt/apigee/data/apigee-postgresql
state: absent
- name: perform postgresql standby replication
shell: nohup {{service}} setup-replication-on-standby -f /tmp/setup_replication.txt >/tmp/standby_replication.log &
register: nohup_rep
- name: get PID of replication progress
shell: ps -eaf|grep -i setup-replication-on-standby|grep -v grep
ignore_errors: true
register: PID
- name: get PID count
shell: ps -eaf|grep -i setup-replication-on-standby|grep -v grep|wc -l
ignore_errors: true
register: PID_COUNT
- fail:
msg: There is an issue with replication - Please check the logs.
when: PID_COUNT.stdout == "0"
- name: print PID of replication process
command: "{{ item }}"
with_items:
- "echo {{nohup_rep.cmd}}"
- "echo {{PID.stdout}}"