First line of admin.conf file downloaded to artifacts directory is wrong

[dmrub]

I set kubeconfig_localhost: true and kubectl_localhost: true. The downloaded admin.conf starts with following line: [kubeconfig] Writing "admin.conf" kubeconfig file. After manually removing this line everything works and I can access kubernetes cluster.

Environment:

• Cloud provider or hardware configuration:
  Installation on single virtual machine in vSphere

• OS (printf "$(uname -srm)\n$(cat /etc/os-release)\n"):
  Linux 3.10.0-957.10.1.el7.x86_64 x86_64
  NAME="CentOS Linux"
  VERSION="7 (Core)"
  ID="centos"
  ID_LIKE="rhel fedora"
  VERSION_ID="7"
  PRETTY_NAME="CentOS Linux 7 (Core)"
  ANSI_COLOR="0;31"
  CPE_NAME="cpe:/o:centos:centos:7"
  HOME_URL="https://www.centos.org/"
  BUG_REPORT_URL="https://bugs.centos.org/"

  CENTOS_MANTISBT_PROJECT="CentOS-7"
  CENTOS_MANTISBT_PROJECT_VERSION="7"
  REDHAT_SUPPORT_PRODUCT="centos"
  REDHAT_SUPPORT_PRODUCT_VERSION="7"

• Version of Ansible (ansible --version):
  ansible 2.7.10

Kubespray version (commit) (git rev-parse --short HEAD):
dcd9c95

Network plugin used:
calico

Copy of your inventory file:

Command used to invoke ansible:

Output of ansible run:

Anything else do we need to know:

[dmrub]

Problem is generated by following task:

kubespray/roles/kubernetes/client/tasks/main.yml

Line 44 in f293873

- name: Generate admin kubeconfig with external api endpoint

In the case that kubeadm_version >= v1.14.0, kubeadm does not output admin.conf to stdout, and shell command outputs its contents with cat:

kubespray/roles/kubernetes/client/tasks/main.yml

Line 69 in f293873

&& cat {{ kube_config_dir }}/external_kubeconfig/admin.conf &&

However, kubeadm outputs the following messages to the stdout that precede admin.conf:
[kubeconfig] Writing "admin.conf" kubeconfig file
or
[kubeconfig] Using existing kubeconfig file: "/etc/kubernetes/external_kubeconfig/admin.conf"

To fix this bug I suggest to change the line:
&& cat {{ kube_config_dir }}/external_kubeconfig/admin.conf &&
to
>/dev/null && cat {{ kube_config_dir }}/external_kubeconfig/admin.conf &&

[lystor]

Hello
Please merge the fix into release-2.10 branch.
Thank you

[woopstar]

Feel free to do a PR to that branch :)