I want to use a public aws keypair .pem file for running ansible playbooks. I want to do this without changing my ~/.ssh/id_rsa.pub and I can't create a new keypair from my current ~/.ssh/id_rsa.pub and apply it to the ec2 instances I am trying to change.
$ ansible --version
ansible 1.9.6
configured module search path = None
Here is my hosts file (note that my actual ip is replaced with 1.2.3.4). This is probably the issue since I need a way to set a public key variable and use that:
[all_servers:vars]
ansible_ssh_private_key_file = ./mykeypair.pem
[dashboard]
1.2.3.4 dashboard_domain=my.domain.info
Here is my playbook:
---
- hosts: dashboard
gather_facts: False
remote_user: ubuntu
tasks:
- name: ping
ping:
This is the command I am using to run it:
ansible-playbook -i ./hosts test.yml
It results in the following error:
fatal: [1.2.3.4] => SSH Error: Permission denied (publickey).
while connecting to 1.2.3.4:22
There is no problem with my keypair:
$ ssh -i mykeypair.pem ubuntu#1.2.3.4 'whoami'
ubuntu
What am I doing wrong?
Ok little mistakes I guess you can't have spaces in host file variables and need to define the group you are applying the vars to. This hosts file works with it all:
[dashboard:vars]
ansible_ssh_private_key_file=./mykeypair.pem
[dashboard]
1.2.3.4 dashboard_domain=my.domain.info
I have come across this and all what I had to do was to run the below
#ssh-agent bash
#ssh-add ~/.ssh/keypair.pem
Related
I'm executing ansible playbook with appuser whereas I wish to create folder with user webuser on localhost.
ssh keys are setup for webuser on my localhost. So after login with appuser I can simply ssh webuser#localhost to switch user to webuser.
Note: I do not have sudo priveledges so I cannot sudo to switch to webuser from appuser.
Below is my playbook that is run with user appuser but needs to create a folder 04May2020 on localhost using webuser
- name: "Play 1"
hosts: localhost
remote_user: "webuser"
vars:
ansible_ssh_extra_args: -o StrictHostKeyChecking=no
ansible_ssh_private_key_file: /app/misc_automation/ssh_keys_id_rsa
tasks:
- name: create folder for today's print
file:
path: "/webWeb/htdocs/print/04May2020"
state: directory
remote_user: webuser
However, the output shows that the folder is created with appuser instead of webuser. See output showing ssh connectivity with appuser instead of webuser.
ansible-playbook /app/Ansible/playbook/print_oracle/print.yml -i /app/Ansible/playbook/print_oracle/allhosts.hosts -vvv
TASK [create folder for today] ***********************************
task path: /app/Ansible/playbook/print_oracle/print.yml:33
Using module file /usr/lib/python2.7/site-packages/ansible/modules/files/file.py
Pipelining is enabled.
<127.0.0.1> ESTABLISH LOCAL CONNECTION FOR USER: appuser
<127.0.0.1> EXEC /bin/sh -c '/usr/bin/python2 && sleep 0'
Can you please suggest if it is possible without sudo?
Putting all my comments together in a comprehensive answer.
<127.0.0.1> ESTABLISH LOCAL CONNECTION FOR USER: appuser
This is indicating that you are connecting to localhost through the local connection plugin, either because you explicitelly re-declared the host as such or because you are using the implicit localhost. From discussions, you are in the second situation.
When using the local connection plugin, as indicated in the above documentation, the remote_user is ignored. Trying to change the user has no effect as you can see in the below test run (user (u)ids changed):
# Check we are locally running as user1
$ id -a
uid=xxxx(user1) gid=yyy(group1) groups=yyy(group1)
# Running the same command through ansible returns the same result
$ ansible localhost -a 'id -a'
localhost | CHANGED | rc=0 >>
uid=xxxx(user1) gid=yyy(group1) groups=yyy(group1)
# Trying to change the remote user has no effect
$ ansible localhost -u whatever -a 'id -a'
localhost | CHANGED | rc=0 >>
uid=xxxx(user1) gid=yyy(group1) groups=yyy(group1)
Without changing your playbook and/or inventory, the only solution is to launch the playbook as the user who needs to create the directory.
Since you have ssh available, an other solution is to declare a new host that you will use only for this purpose, which will target the local IP through ssh. (Note: you can explicitly declare localhost like this but then all connections will go through ssh which might not be what you want to do).
Somewhere at the top of you inventory, add the line:
localssh ansible_host=127.0.0.1
And in your playbook, change
hosts: localssh
Now the connection to your local machine will go through ssh and the remote_user will be obeyed correctly.
One way you can try is by setting the ansible_connection to localhost. To do this, in the directory from which you are running ansible commands, create a host_vars directory. In that sub-directory, create a file named localhost, containing the line ansible_connection: smart
I am using Ansible to provision a Vagrant environment. As part of the provisioning process, I need to connect from the currently-provisioning VM to a private external repository using an ssh key in order to use composer to pull in modules for an application. I've done a lot of reading on this before asking this question, but still can't seem to comprehend what's going on.
What I want to happen is:
As part of the playbook, on the Vagrant VM, I add the ssh key to the private repo to the ssh-agent
Using that private key, I am then able to use composer to require modules from the external source
I've read articles which highlight specifying the key in playbook execution. (E.g. ansible-play -u username --private-key play.yml) As far as I understand, this isn't for me, as I'm calling the playbook via Vagrant file. I've also read articles which mention ssh forwarding. (SSH Agent Forwarding with Ansible). Based on what I have read, this is what I've done:
On the VM being provisioned, I insert a known_hosts file which consists of the host entries of the machines which house the repos I need:
On the VM being provisioned, I have the following in ~/.ssh/config:
Host <VM IP>
ForwardAgent yes
I have the following entries in my ansible.cfg to support ssh forwarding:
[defaults]
transport = ssh
[ssh_connection]
ssh_args=-o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s -o ControlPath=/tmp/ansible-ssh-%h-%p-%r
[privilege_escalation]
pipelining = False
I have also added the following task to the playbook which tries to
use composer:
- name: Add ssh agent line to sudoers
become: true
lineinfile:
dest: /etc/sudoers
state: present
regexp: SSH_AUTH_SOCK
line: Defaults env_keep += "SSH_AUTH_SOCK"
I exit the ansible provisioner and add the private key on the provisioned VM to the agent via a shell provisioner (This is where I suspect I'm going wrong)
Then, I attempt to use composer, or call git via the command module. Like this, for example, to test:
- name: Test connection
command: ssh -T git#github.com
Finally, just in case I wasn't understanding ssh connection forwarding correctly, I assumed that what was supposed to happen was that I needed to first add the key to my local machine's agent, then forward that through to the provisioned VM to use to grab the repositories via composer. So I used ssh-add on my local machine before executing vagrant up and running the provisioner.
No matter what, though, I always get permission denied when I do this. I'd greatly appreciate some understanding as to what I may be missing in my understanding of how ssh forwarding should be working here, as well as any guidance for making this connection happen.
I'm not certain I understand your question correctly, but I often setup machines that connect to a private bitbucket repository in order to clone it. You don't need to (and shouldn't) use agent forwarding for that ("ssh forwarding" is unclear; there's "authentication agent forwarding" and "port forwarding", but you need neither in this case).
Just to be clear with terminology, you are running Ansible in your local machine, you are provisioning the controlled machine, and you want to ssh from the controlled machine to a third-party server.
What I do is I upload the ssh key to the controlled machine, in /root/.ssh (more generally $HOME/.ssh where $HOME is the home directory of the controlled machine user who will connect to the third-party server—in my case that's root). I don't use the names id_rsa and id_rsa.pub, because I don't want to touch the default keys of that user (these might have a different purpose; for example, I use them to backup the controlled machine). So this is the code:
- name: Install bitbucket aptiko_ro ssh key
copy:
dest: /root/.ssh/aptiko_ro_id_rsa
mode: 0600
content: "{{ aptiko_ro_ssh_key }}"
- name: Install bitbucket aptiko_ro ssh public key
copy:
dest: /root/.ssh/aptiko_ro_id_rsa.pub
content: "{{ aptiko_ro_ssh_pub_key }}"
Next, you need to tell the controlled machine ssh this: "When you connect to the third-party server, use key X instead of the default key, and logon as user Y". You tell it in this way:
- name: Install ssh config that uses aptiko_ro keys on bitbucket
copy:
dest: /root/.ssh/config
content: |
Host bitbucket.org
IdentityFile ~/.ssh/aptiko_ro_id_rsa
User aptiko_ro
I'm not able to connect to a host in Ansible. This is the error:
192.168.1.12 | UNREACHABLE! => {
"changed": false,
"msg": "ERROR! SSH encountered an unknown error during the connection. We recommend you re-run the command using -vvvv, which
will enable SSH debugging output to help diagnose the issue",
"unreachable": true }
This is my hosts file:
[test]
192.168.1.12
And this is the ad-hoc instruction:
ansible all -m ping
I'm able to connect via raw ssh.
By default Ansible try to use SSH keys. It seems that you have wrong keys. Try to use Password authentication.
ansible all -m ping --ask-pass --ask-sudo-pass
I Hope it helps.
#bigdestroyer, to setup ssh public keys use this playbook
- hosts: all
remote_user: root
vars:
authorized_key_list:
- name: root
authorized_keys:
- key: "{{ lookup('file', '~/.ssh/id_rsa.pub') }}"
state: present
roles:
- { role: GROG.authorized-key }
Execute this playbook with --ask-pass since you'll use it to setup public key authentication.
ansible-playbook setup_ssh.yml --ask-pass
This role will add your current user public key to remote host authorized_keys file.
NOTE
ask-pass works only one time per run so this will only work with hosts that has the same password.
I usually use -limit and execute in batches on hosts that has the same password.
For example, let's assume host1,host2 and host3 has password foo host4 and host5 bar
ansible-playbook setup-ssh.yml --ask-pass -l host1,host2,host3
provide password foo
ansible-playbook setup-ssh.yml --ask-pass -l host4,host5
provide password bar
THEN
ansible -m ping host1,host2,host3,host4,host5
You can read the role documentation here
For those that come here running Ansible 2.6, --ask-sudo-pass is now deprecated. The correct syntax is:
ansible all -m ping --ask-pass --ask-become-pass
I encountered this issue - my ssh keys weren't set up correctly. I fixed this using the following:
Make sure each machine has an ssh keys set up, using the ssh-keygen command.
ssh-keygen
Pass your public key over to the machine, using the ssh-copy-id command.
ssh-copy-id -i <location of id_rsa.pub> <ip-address of host>
This helped resolve my error, hopefully it helps!
I resolved this issue by adding --ask-pass argument
I'm generated ssh key, and copy it to remote server. When I try to ssh to that server everything works fine:
ssh user#ip_address
User is not a root. If I try to ssh throw ansible:
ansible-playbook -i hosts playbook.yml
with ansible playbook:
---
- hosts: web
remote_user: user
tasks:
- name: test connection
ping:
and hosts file:
[web]
192.168.0.103
I got error:
...
Permission denied (publickey,password)
What's the problem?
Ansible is using different key compared to what you are using to connect to that 'web' machine.
You can explicitly configure ansible to use a specific private key by
private_key_file=/path/to/key_rsa
as mentioned in the docs Make sure that you authorize that key which ansible uses, to the remote user in remote machine with ssh-copy-id -i /path/to/key_rsa.pub user#webmachine_ip_address
In my case I got similar error while running ansible playbook when host changed it's fingerprint. I found this, trying to establish ssh connection from command line. So, after running ssh-keygen -f "/root/.ssh/known_hosts" -R my_ip this problem was solved.
Hi Run the play as below. by default ansible plays using root.
ansible-playbook -i hosts playbook.yml -u user
If you still get the error, run below and paste the out-put here.
ansible-playbook -i hosts playbook.yml -u user -vvv
How do I setup passwordless ssh between nodes on AWS cluster
Following steps to setup password less authentication are tested thoroughly for Centos and Ubuntu.
Assumptions:
You already have access to your EC2 machine. May be using the pem key or you have credentials for a unix user which has root permissions.
You have already setup RSA keys on you local machine. Private key and public key are available at "~/.ssh/id_rsa" and "~/.ssh/id_rsa.pub" respectively.
Steps:
Login to you EC2 machine as a root user.
Create a new user
useradd -m <yourname>
sudo su <yourname>
cd
mkdir -p ~/.ssh
touch ~/.ssh/authorized_keys
Append contents of file ~/.ssh/id_rsa.pub on you local machine to ~/.ssh/authorized_keys on EC2 machine.
chmod -R 700 ~/.ssh
chmod 600 ~/.ssh/*
Make sure sshing is permitted by the machine. In file /etc/ssh/sshd_config, make sure that line containing "PasswordAuthentication yes" is uncommented. Restart sshd service if you make any change in this file:
service sshd restart # On Centos
service ssh restart # On Ubuntu
Your passwordless login should work now. Try following on your local machine:
ssh -A <yourname>#ec2-xx-xx-xxx-xxx.ap-southeast-1.compute.amazonaws.com
Making yourself a super user. Open /etc/sudoers. Make sure following two lines are uncommented:
## Allows people in group wheel to run all commands
%wheel ALL=(ALL) ALL
## Same thing without a password
%wheel ALL=(ALL) NOPASSWD: ALL
Add yourself to wheel group.
usermod -aG wheel <yourname>
This may help someone
Copy the pem file on the machine then copy the content of pem file to the .ssh/id_rsa file you can use bellow command or your own
cat my.pem > ~/.ssh/id_rsa
try ssh localhost it should work and same with the other machines in the cluster
how I made Paswordless shh work between two instances is the following:
create ec2 instances – they should be in the same subnet and have the same security group
Open ports between them – make sure instances can communicate to each other. Use the default security group which has one rule relevant for this case:
Type: All Traffic
Source: Custom – id of the security group
Log in to the instance you want to connect from to the other instance
Run:
1 ssh-keygen -t rsa -N "" -f /home/ubuntu/.ssh/id_rsa
to generate a new rsa key.
Copy your private AWS key as ~/.ssh/my.key (or whatever name you want to use)
Make sure you change the permission to 600
1 chmod 600 .ssh/my.key
Copy the public key to the instance you wish to connect to passwordless
1 cat ~/.ssh/id_rsa.pub | ssh -i ~/.ssh/my.key ubuntu#10.0.0.X "cat >> ~/.ssh/authorized_keys"
If you test the passwordless ssh to the other machine, it should work.
1 ssh 10.0.0.X
you can use ssh keys like described here:
http://pkeck.myweb.uga.edu/ssh/