操作系统 ubuntu18.04, 安装 k8s 1.17：
Tuesday 17 March 2020 15:10:20 +0800 (0:00:00.150) 0:00:20.002 *********
ok: [master01]
ok: [node01]
ok: [node02]
ok: [master02]
ok: [master03]
TASK [prepare/nodes : Annotating nodes] *********************************************************************************
Tuesday 17 March 2020 15:10:20 +0800 (0:00:00.376) 0:00:20.378 *********
fatal: [master01]: FAILED! => {}
MSG:
Invalid variable name in ‘register’ specified: ‘import’
fatal: [node01]: FAILED! => {}
MSG:
Invalid variable name in ‘register’ specified: ‘import’
fatal: [master03]: FAILED! => {}
MSG:
Invalid variable name in ‘register’ specified: ‘import’
fatal: [master02]: FAILED! => {}
MSG:
Invalid variable name in ‘register’ specified: ‘import’
fatal: [node02]: FAILED! => {}
MSG:
Invalid variable name in ‘register’ specified: ‘import’
PLAY RECAP **************************************************************************************************************
master01 : ok=12 changed=4 unreachable=0 failed=1 skipped=11 rescued=0 ignored=0
master02 : ok=9 changed=2 unreachable=0 failed=1 skipped=11 rescued=0 ignored=0
master03 : ok=9 changed=2 unreachable=0 failed=1 skipped=11 rescued=0 ignored=0
node01 : ok=13 changed=4 unreachable=0 failed=1 skipped=7 rescued=0 ignored=0
node02 : ok=13 changed=4 unreachable=0 failed=1 skipped=7 rescued=0 ignored=0
