bind loopback and default IP

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1

I am writing a redis playbook and I want to have any new redis replication node built listen on the loopback address AND default IP address. I am having trouble trying to figure out how to achieve this. I have it set up in my jijna template like this:

bind {{ hostvars[inventory_hostname][‘ansible_default_ipv4’][‘address’] }}

This is what I have in my defaults/main.yml
redis_bind_interface: 127.0.0.1 “{{ ansible_all_ipv4_addresses }}”

Thanks in advance!

2

The jinja template doesn't use this 'redis_bind_interface' variable?

But if you want to use it, you should define it like this in your
playbook (or role, judging by the file name):

redis_bind_interface: "127.0.0.1 {{ ansible_all_ipv4_addresses | join (' ') }}"

Note that ansible_all_ipv4_addresses is a list, so you have to join it
using a space.

Then refer to it like this in your template:

bind {{ redis_bind_interface }}

3

Getting this after running the playbook

fatal: [10.150.1.128]: FAILED! => {
“changed”: false,
“msg”: “AnsibleError: An unhandled exception occurred while templating ‘127.0.0.1 {{ ansible_all_ipv4_address|join[‘0’] }}’. Error was a <class ‘ansible.errors.AnsibleError’>, original message: template error while templating string: expected token ‘end of print statement’, got ‘[’. String: 127.0.0.1 {{ ansible_all_ipv4_address|join[‘0’] }}”
}

Thisi s from my defaults/main.yml
redis_bind_interface: “127.0.0.1 {{ ansible_all_ipv4_address|join[‘0’] }}”

This is from the templated jinja
bind {{ redis_bind_interface }}

4

Getting this after running the playbook

fatal: [10.150.1.128]: FAILED! => {
"changed": false,
"msg": "AnsibleError: An unhandled exception occurred while templating '127.0.0.1 {{
ansible_all_ipv4_address|join['0'] }}'. Error was a <class 'ansible.errors.AnsibleError'>, original message: template
error while templating string: expected token 'end of print statement', got '['. String: 127.0.0.1 {{
ansible_all_ipv4_address|join['0'] }}"
}

Thisi s from my defaults/main.yml
redis_bind_interface: "127.0.0.1 {{ ansible_all_ipv4_address|join['0'] }}"

This is from the templated jinja
bind {{ redis_bind_interface }}

Why do you use join['0'] ?

Regards
         Racke

5

That is because you did not use the instruction that I gave, but
instead mangled it so that it now gives errors.
Just copy paste what I wrote for redis_bind_interface.

6

I ended up doing this:
redis_bind_interface: “127.0.0.1 {{ ansible_default_ipv4.address }}”

However now I’m having issues copying the config file to the newly built server. It shows that it is making the change to the /etc/redis.conf but the change doesn’t make it. I have tried renaming the current config file and it still won’t do it. I have full sudo rights ( my own lab box) and I have a become directive in my template block.

  • name: Ensure Redis is configured.
    template:
    src: redis.conf.j2
    dest: “{{ redis_conf_path }}”
    mode: 0640
    owner: redis
    group: root
    backup: yes
    force: yes
    become: true
    notify: restart redis
7

I ended up doing this:
redis_bind_interface: "127.0.0.1 {{ ansible_default_ipv4.address }}"

However now I'm having issues copying the config file to the newly built server. It shows that it is making the change
to the /etc/redis.conf but the change doesn't make it. I have tried renaming the current config file and it still won't
do it. I have full sudo rights ( my own lab box) and I have a become directive in my template block.

- name: Ensure Redis is configured.
template:
src: redis.conf.j2
dest: "{{ redis_conf_path }}"
mode: 0640
owner: redis
group: root
backup: yes
force: yes
become: true
notify: restart redis

Can you show the output of this task with using --diff when executing your play book?

Regards
        Racke

8

TASK [redis : Ensure Redis is configured.] ************************************************************************************************************************************************************************
task path: /opt/syseng/automation/ansible/playbooks/roles/redis/tasks/main.yml:24
NOTIFIED HANDLER redis : restart redis for 10.150.1.128
— before: /etc/redis.conf
+++ after: /home/andrew.meyer/.ansible/tmp/ansible-local-2556111vlumpr9k/tmpvxxyrw0q/redis.conf.j2
@@ -0,0 +1,44 @@
+# Ansible managed

9

TASK [redis : Ensure Redis is configured.]
************************************************************************************************************************************************************************
task path: /opt/syseng/automation/ansible/playbooks/roles/redis/tasks/main.yml:24
NOTIFIED HANDLER redis : restart redis for 10.150.1.128
--- before: /etc/redis.conf
+++ after: /home/andrew.meyer/.ansible/tmp/ansible-local-2556111vlumpr9k/tmpvxxyrw0q/redis.conf.j2
@@ -0,0 +1,44 @@
+# Ansible managed
+
+daemonize no
+pidfile /var/run/redis/redis.pid
+port 6379
+bind 127.0.0.1 10.150.1.128
+
+
+supervisd systemd
+
+timeout 300
+
+protected mode False
+
+loglevel notice
+logfile /var/log/redis/redis-server.log
+
+# To enable logging to the system logger, just set 'syslog-enabled' to yes,
+# and optionally update the other syslog parameters to suit your needs.
+# syslog-enabled no
+# syslog-ident redis
+# syslog-facility local0
+
+databases 16
+
+save 900 1
+save 300 10
+save 60 10000
+
+rdbcompression yes
+dbfilename dump.rdb
+dir /var/lib/redis
+
+# maxclients 128
+
+
+appendonly yes
+appendfsync everysec
+no-appendfsync-on-rewrite no
+appendfilename appendonly.aof
+
+
+
+

changed: [10.150.1.128] => {"changed": true}

So you are saying that content doesn't end up in /etc/redis.conf on your server (IP 10.150.1.128) ?

Regards
       Racke

10

Are you sure you're not running in check mode?

11

Are you sure you're not running in check mode?

Or looking at the wrong server?

Regards
        Racke

12

Stupid me I was doing it in check mode…but I tried it without it yesterday and it still wouldn’t make the changes.

Thanks for your help! On to the next hurdle w/ this playbook.