Ansible - Change SSH user during playbook execution - ssh

Question

I'm new to ansible, maybe someone can help me with this configuration.
I have an inventory of multiple servers. SSH access to these servers is secured using PEM key files.
I have a playbook and want to change the ansible ssh user (default devops) to root if user devops on the remote host not exists. The root access should be done by using username and password.
This is my playbook:
- name: Deploy "devops" user on my_new_hosts
hosts: my_new_hosts
gather_facts: false
tasks:
- name: Test User "devops"
local_action: "command ssh -q -o BatchMode=yes -o ConnectTimeout=3 {{ inventory_hostname }} 'echo ok'"
register: test_devops
ignore_errors: true
changed_when: false
- name: Create User "devops"
remote_user: "{{ test_devops | success | ternary(omit, 'root') }}"
user:
name: "devops"
update_password: on_create
groups: "sudo"
append: yes
shell: "/bin/bash"
skeleton: "/etc/skel"
create_home: yes
I followed the instructions regarding in this post : Ansible: Check if my user exists on remote host, else use root user to connect with ssh
I'm using local ssh-agent for keeping my password for user devops. How is it possible to force the ask_pass command for root?
TASK [Create User "devops"] ****************************************************
task path: /etc/ansible/playbooks/cms_deploy_user_devops_with_root.yml:13
Using module file /usr/lib/python2.7/dist-packages/ansible/modules/core/system/user.py
<my-host> ESTABLISH SSH CONNECTION FOR USER: root
<my-host> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=root -o ConnectTimeout=10 -o ControlPath=/home/devops/.ansible/cp/ansible-ssh-%h-%p-%r my-host '/bin/sh -c '"'"'( umask 77 && mkdir -p "` echo ~/.ansible/tmp/ansible-tmp-1529062422.28-123292817615678 `" && echo ansible-tmp-1529062422.28-123292817615678="` echo ~/.ansible/tmp/ansible-tmp-1529062422.28-123292817615678 `" ) && sleep 0'"'"''
fatal: [my-host]: UNREACHABLE! => {
"changed": false,
"unreachable": true
}
MSG:
Failed to connect to the host via ssh: OpenSSH_7.4p1 Raspbian-10+deb9u3, OpenSSL 1.0.2l 25 May 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: auto-mux: Trying existing master
debug1: Control socket "/home/devops/.ansible/cp/ansible-ssh-my-host-22-root" does not exist
debug2: resolving "my-host" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to my-host [192.168.xx.xx] port 22.
debug2: fd 3 setting O_NONBLOCK
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug3: timeout: 10000 ms remain after connect
debug1: identity file /home/devops/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/devops/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Raspbian-10+deb9u3
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.10
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.10 pat OpenSSH_6.6.1* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to my-host:22 as 'root'
debug3: hostkeys_foreach: reading file "/home/devops/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/devops/.ssh/known_hosts:5
debug3: load_hostkeys: loaded 1 keys from my-host
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01#openssh.com,ecdsa-sha2-nistp384-cert-v01#openssh.com,ecdsa-sha2-nistp521-cert-v01#openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256#libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01#openssh.com,ecdsa-sha2-nistp384-cert-v01#openssh.com,ecdsa-sha2-nistp521-cert-v01#openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01#openssh.com,ssh-rsa-cert-v01#openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305#openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm#openssh.com,aes256-gcm#openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc: chacha20-poly1305#openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm#openssh.com,aes256-gcm#openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: umac-64-etm#openssh.com,umac-128-etm#openssh.com,hmac-sha2-256-etm#openssh.com,hmac-sha2-512-etm#openssh.com,hmac-sha1-etm#openssh.com,umac-64#openssh.com,umac-128#openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm#openssh.com,umac-128-etm#openssh.com,hmac-sha2-256-etm#openssh.com,hmac-sha2-512-etm#openssh.com,hmac-sha1-etm#openssh.com,umac-64#openssh.com,umac-128#openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: zlib#openssh.com,zlib,none
debug2: compression stoc: zlib#openssh.com,zlib,none
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256#libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm#openssh.com,aes256-gcm#openssh.com,chacha20-poly1305#openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc#lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm#openssh.com,aes256-gcm#openssh.com,chacha20-poly1305#openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc#lysator.liu.se
debug2: MACs ctos: hmac-md5-etm#openssh.com,hmac-sha1-etm#openssh.com,umac-64-etm#openssh.com,umac-128-etm#openssh.com,hmac-sha2-256-etm#openssh.com,hmac-sha2-512-etm#openssh.com,hmac-ripemd160-etm#openssh.com,hmac-sha1-96-etm#openssh.com,hmac-md5-96-etm#openssh.com,hmac-md5,hmac-sha1,umac-64#openssh.com,umac-128#openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160#openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5-etm#openssh.com,hmac-sha1-etm#openssh.com,umac-64-etm#openssh.com,umac-128-etm#openssh.com,hmac-sha2-256-etm#openssh.com,hmac-sha2-512-etm#openssh.com,hmac-ripemd160-etm#openssh.com,hmac-sha1-96-etm#openssh.com,hmac-md5-96-etm#openssh.com,hmac-md5,hmac-sha1,umac-64#openssh.com,umac-128#openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160#openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib#openssh.com
debug2: compression stoc: none,zlib#openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256#libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305#openssh.com MAC: <implicit> compression: zlib#openssh.com
debug1: kex: client->server cipher: chacha20-poly1305#openssh.com MAC: <implicit> compression: zlib#openssh.com
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:frX/+3pJF0LBtAnLE0j3rIbXOC/bGIsUflTcwQWBrHA
debug3: hostkeys_foreach: reading file "/home/devops/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/devops/.ssh/known_hosts:5
debug3: load_hostkeys: loaded 1 keys from my-host
debug3: hostkeys_foreach: reading file "/home/devops/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/devops/.ssh/known_hosts:6
debug3: load_hostkeys: loaded 1 keys from 192.168.xx.xx
debug1: Host 'my-host' is known and matches the ECDSA host key.
debug1: Found key in /home/devops/.ssh/known_hosts:5
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug2: key: /home/devops/.ssh/id_rsa (0x1d17d58), agent
debug2: key: /home/devops/.ssh/id_dsa ((nil))
debug2: key: /home/devops/.ssh/id_ecdsa ((nil))
debug2: key: /home/devops/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-with-mic,gssapi-keyex,hostbased,publickey
debug3: authmethod_lookup publickey
debug3: remaining preferred: ,gssapi-keyex,hostbased,publickey
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/devops/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/devops/.ssh/id_dsa
debug3: no such identity: /home/devops/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/devops/.ssh/id_ecdsa
debug3: no such identity: /home/devops/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/devops/.ssh/id_ed25519
debug3: no such identity: /home/devops/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey,password).
Can someone help me or explain where my fallacy is?

Answer 1

It's issue with your SSH-Keys.
You must correctly add your public / private keys.
debug3: no such identity: /home/devops/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/devops/.ssh/id_ecdsa
debug3: no such identity: /home/devops/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/devops/.ssh/id_ed25519
debug3: no such identity: /home/devops/.ssh/id_ed25519: No such file or directory
Please add the key to your agent using:
ssh-add