Ansible get current target host s IP address

Question

How do you get the current host s IP address in a role   I know you can get the list of groups the host is a member of and the hostname of the host but I am unable to find a solution to getting the IP address   You can get the hostname by using   inventory hostname   and the group by using   group names    I have tried things like    hostvars    inventory hostname      ansible ssh host      and ip     hostvars    inventory hostname    ansible ssh host

User · Answer

You can use in your template j2    ansible eth0 ipv4 address    the same way you use   inventory hostname     ps  Please refer to the following blogpost to have more information about HOW TO COLLECT INFORMATION ABOUT REMOTE HOSTS WITH ANSIBLE GATHERS FACTS      hoping it   ll help someone one day

User · Answer

http   docs ansible com ansible latest plugins lookup dig html  so in template  for e  g       lookup  dig   ansible host       Notes    Since not only DNS name could be used in inventory a check if it s not IP already better be added Obviously enough this receipt wouldn t work as intended for indirect host specifications  like using jump hosts  for e  g     But still it serves 99    figuratively speaking  of use cases

User · Answer

You can get the IP address from hostvars  dict ansible default ipv4 and key address  hostvars inventory hostname   ansible default ipv4    address     and IPv6 address respectively  hostvars inventory hostname   ansible default ipv6    address     An example playbook   --- - hosts  localhost   tasks      - debug  var hostvars inventory hostname   ansible default ipv4    address       - debug  var hostvars inventory hostname   ansible default ipv6    address

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Just use ansible ssh host variable      playbook example yml   - hosts  host1   tasks    - name  Show host s ip     debug        msg      ansible ssh host          hosts yml    hosts  host1   ansible host 1 2 3 4      Result   TASK  Show host s ip                                                                                                                                                                                                ok   host1    gt          msg    1 2 3 4

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Plain ansible default ipv4 address might not be what you think in some cases  use   ansible default ipv4 address default ansible all ipv4 addresses 0

User · Answer

If you want the external public IP and you re in a cloud environment like AWS or Azure  you can use the ipify facts module     TODO  SECURITY  This requires that we trust ipify to provide the correct public IP  We could run our own ipify server  - name  Get my public IP from ipify org   ipify facts    This will place the public IP into the variable ipify public ip

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A list of all addresses is stored in a fact ansible all ipv4 addresses  a default address in ansible default ipv4 address   --- - hosts  localhost   connection  local   tasks      - debug  var ansible all ipv4 addresses     - debug  var ansible default ipv4 address   Then there are addresses assigned to each network interface    In such cases you can display all the facts and find the one that has the value you want to use

User · Answer

Another way to find public IP would be to use uri module       - name  Find my public ip       uri           url  http   ifconfig me ip         return content  yes       register  ip response   Your IP will be in ip response content

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The following snippet will return the public ip of the remote machine and also default ip i e  LAN   This will print ip s in quotes also to avoid confusion in using config files    x000D   x000D   gt  gt  main yml x000D   x000D  --- x000D  - hosts  localhost x000D    tasks  x000D      - name  ipify x000D        ipify facts  x000D      - debug  var hostvars inventory hostname   ipify public ip   x000D      - debug  var hostvars inventory hostname   ansible default ipv4    address   x000D      - name  template x000D        template  x000D          src  debug j2 x000D          dest   tmp debug ansible x000D   x000D   gt  gt  templates debug j2 x000D   x000D  public ip    hostvars inventory hostname   ipify public ip      x000D  public ip in quotes     hostvars inventory hostname   ipify public ip       x000D   x000D  default ipv4    hostvars inventory hostname   ansible default ipv4    address      x000D  default ipv4 in quotes     hostvars inventory hostname   ansible default ipv4    address       x000D   x000D   x000D

User · Answer

Simple debug command   ansible -i inventory hosts yaml -m debug -a  var hostvars inventory hostname   all   output    hostvars inventory hostname           ansible check mode   false        ansible diff mode   false        ansible facts             ansible forks   5        ansible host    192 168 10 125         ansible inventory sources               root workspace ansible-minicros inventory hosts yaml               ansible playbook python     usr bin python2         ansible port   65532        ansible verbosity   0        ansible version              full    2 8 5             major   2            minor   8            revision   5            string    2 8 5            get host ip address   ansible -i inventory hosts yaml -m debug -a  var hostvars inventory hostname  ansible host  all  zk01   SUCCESS   gt         hostvars inventory hostname  ansible host    192 168 10 125

[ansible] Ansible: get current target host's IP address

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