zdtsw

Error: cannot see nodes even "kubeadmin init" looks okej
>kubectl get nodes
Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")
Solution:
[root@kubint01 ~]# cp /etc/kubernetes/kubelet.conf ~/.kube/config
[root@kubint01 ~]# export KUBECONFIG=$HOME/.kube/config
[root@kubint01 ~]# echo $KUBECONFIG
/root/.kube/admin.conf
[root@kubint01 ~]# kubectl get nodes

zdtsw

#!groovy
@Library('deliveryLib')_ 
pipeline{
  agent {}
  environment{ VAR = credentials(VAL)}
  options{}
  tools{maven '****'}
  triggers{ cron('H */4 * * 1-5') }
  parameters{}
  stages{

zdtsw

We use mattermost along with hubot for some internal fun stuff
the settings requires:
1. a server has mattermost running on 
2. a server had hubot running on (could be the same server as the one mattermost is, or a dedicated one) in my case, two different servers
3. a jenkins instance (this is only when you want to interact with jenkins for some more serious stuff)

in mattermost, it requires:
1. public channel which hubot can read from (as incoming) and write to (as outgoing)
* remember in mattermost it is not possible to convert a public to private or viceversa , this can be done in slack
2. token generated by outgoing webhook : (example is based on I have a public channel named "Jon"

zdtsw

sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux

zdtsw

#ansible-vault file#
create a file in your ansible, e.g mySecret.yml
>cat mySecret.yml
---
myBankId: | 
  12345
myPin: |
  abcd
myJenkinsPsw: |
  !"#¤%  

zdtsw

there are something need to check for your ssh if you try to use publickey but it does not work for you (still ask for password)
1. /etc/ssh/sshd_config on server should allow correct group :
> AllowGroups  groupA groupB

2. on the target machine, ssh users folder should have right permission
700 .ssh/authorized_keys
700 .ssh/

zdtsw

ISSUE:
in module "unarchive"
- owner and group only set the file after decompress but not the folders
- need to use "file" module and recurse=yes set owner and group on the "top" folder after unarchive

Template:
use variable in template, ansible would set value during this template is called
use -force can overwrite any difference on target machine's template file with current one in ansible (after variable replace with value)

zdtsw

1. install flyway command line by downloading: flyway-commandline-4.2.0-linux-x64.tar.gz (or some later version)
2. >tar xvfz flyway-commandline-4.2.0-linux-x64.tar.gz
3. >cd flyway-4.2.0
4. >vi conf/flyway.conf 
: user, pasword, url need to be updated with correct value
5. >vi sql/V1__Create_person_table.sql
: put how you want to perform on the first transition, say create table etc
6. >flyway validate to check it first
7. >flyway migrate
: if you see ERROR, try to fix it in the *.sql file you created above

zdtsw

class jenkins_slave::erlang  ( $version ) {
  
file { '/etc/yum.repos.d/erlang.repo':
    source  => 'puppet:///modules/jenkins_slave/erlang.repo',
    owner  => 'root',
    group  => 'root',
    mode   => '0640',
  }

  package {'erlang':

zdtsw

Limitation in Jenkins 2.0 pipeline:
org.jenkinsci.plugins.scriptsecurity.sandbox.RejectedAccessException: Scripts not permitted to use method java.lang.String split java.lang.String int
when in jenkinsfile:
 def a = "jij-fhsif-vasdfs-sfa"
 String[] str = a.split('-',2)
 echo  str[1]
 
also code like this:
def (first, other) = a.split('-',2)
seems not work on my side