Error: Could not request certificate: getaddrinfo - puppet agent

 Issue:

[root@puppet-client ~]# /opt/puppetlabs/bin/puppet agent --test

Error: Could not request certificate: getaddrinfo: Name or service not known

Exiting; failed to retrieve certificate and waitforcert is disabled

Solution: Make sure you check following

• Is the master running?
• Does the hostname 'puppet' or 'puppet.abc.com' resolve from the agent?
• Is TCP port 8140 on the master reachable from the agent (try: telnet puppet 8140)?
• What does syslog on the agent say?
• Try puppet agent --test on the agent, which will attempt to connect to the master and stay in foreground to show the output.

Tried all of those still did not work. Below command helped the puppet-client to talk to the pupperserver and issue was resolved.

[root@puppet-client ~]# puppet agent --server=idm-puppetmaster.interview.local

[root@idm-puppetmaster ~]# /opt/puppetlabs/bin/puppet cert list --all

  "puppet-client.interview.local"    (SHA256) F0:8C:52:53:DC:CD:1A:

- Make sure that you sign the client cert.

[root@idm-puppetmaster ~]# /opt/puppetlabs/bin/puppet cert sign puppet-client.interview.local

Signing Certificate Request for:

  "puppet-client.interview.local" (SHA256) F0:8C:52:53:DC:CD:1A:A4:9

output is truncated.............

How to install and Use PSFTP – Putty’s SFTP Client

Go to - https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

And

Download - https://the.earth.li/~sgtatham/putty/latest/w64/psftp.exe

- Once the client is open. [PS: don't use root user, instead login as a normal user]

psftp: no hostname specified; use "open host.name" to connect

psftp> open root@192.168.119.144

Using username "root".

root@192.168.119.144's password:

Remote working directory is /root

psftp> dir

Listing directory /root

dr-xr-x---   17 root     root         4096 Dec  9 22:41 .

dr-xr-xr-x   21 root     root         4096 Nov 24 16:15 ..

-rw-------    1 root     root        22167 Dec 10 00:30 .bash_history

-rw-r--r--    1 root     root           18 Dec 29  2013 .bash_logout

-rw-r--r--    1 root     root          259 Dec  8 13:27 .bash_profile

-rw-r--r--    1 root     root          176 Dec  8 13:25 .bashrc

psftp: no hostname specified; use "open host.name" to connect

psftp> open root@192.168.119.144

Using username "root".

root@192.168.119.144's password:

Remote working directory is /root

psftp> dir

Listing directory /root

dr-xr-x---   17 root     root         4096 Dec  9 22:41 .

dr-xr-xr-x   21 root     root         4096 Nov 24 16:15 ..

-rw-------    1 root     root        22167 Dec 10 00:30 .bash_history

-rw-r--r--    1 root     root           18 Dec 29  2013 .bash_logout

-rw-r--r--    1 root     root          259 Dec  8 13:27 .bash_profile

-rw-r--r--    1 root     root          176 Dec  8 13:25 .bashrc

psftp: no hostname specified; use "open host.name" to connect

psftp> open root@192.168.119.144

Using username "root".

root@192.168.119.144's password:

Remote working directory is /root

psftp> lpwd

Current local directory is C:\Users\rajus\OneDrive\Documents\splunk

psftp> put fakedata.csv

local:fakedata.csv => remote:/root/fakedata.csv

psftp> ls

Listing directory /root

dr-xr-x---   17 root     root         4096 Dec 10 11:51 .

dr-xr-xr-x   21 root     root         4096 Nov 24 16:15 ..

-rw-------    1 root     root        22167 Dec 10 00:30 .bash_history

-rw-r--r--    1 root     root           18 Dec 29  2013 .bash_logout

-rw-r--r--    1 root     root          259 Dec  8 13:27 .bash_profile

-rw-r--r--    1 root     root          176 Dec  8 13:25 .bashrc

-rw-r--r--    1 root     root       127819 Dec 10 11:51 fakedata.csv

 Bash Auto completion package install and enable the completion feature.

Install the package with yum and source the bash_completion.sh and logout/login back.

yum install bash-completion bash-completion-extras

source /etc/profile.d/bash_completion.sh

How to change "which java" path to the desired Java version

- open .bash_profile and add the following to make java version as needed ( I needed this for jenkins and maven project as mvn install was failing from the ci_workflow job

 export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

export PATH=$JAVA_HOME/bin:$PATH

- simply source the .bash_profile

[root@katello ~]# which java

/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64/bin/java

[root@katello ~]# java -version

openjdk version "11.0.9" 2020-10-20 LTS

OpenJDK Runtime Environment 18.9 (build 11.0.9+11-LTS)

OpenJDK 64-Bit Server VM 18.9 (build 11.0.9+11-LTS, mixed mode, sharing)

[root@katello ~]# date

Tue Dec  8 12:28:18 IST 2020

 Installing maven and setting JAVA_HOME on CentOS7.

download binary tar.gz from - https://maven.apache.org/download.cgi

move it to /usr/local/src/

- Run below command to untar the file

# tar -xvzf apache-maven-3.6.3-bin.tar.gz

- Rename the default directory 

# mv apache-maven-3.6.3/ apache-mvn/

- Go to /etc/profile.d

# vi maven.sh

#!/bin/bash

# Apache Maven Environment Variables

# MAVEN_HOME for Maven 1 - M2_HOME for Maven 2

export M2_HOME=/usr/local/src//apache-mvn/

export PATH=${M2_HOME}/bin:${PATH}

- change the permission to executable

# chmod +x maven.sh

# source maven.sh

[root@katello ~]# mvn -version

The JAVA_HOME environment variable is not defined correctly

This environment variable is needed to run this program

NB: JAVA_HOME should point to a JDK not a JRE

Ran into this error - I had two versions of JDK installed jdk1.8.0_271-i586 and java-11-openjdk-11.0.9.11-0.el7_9.x86_64 

- Simply followed the JAVA_HOME to set to the latest Java version

# .bashrc

# User specific aliases and functions

alias rm='rm -i'

alias cp='cp -i'

alias mv='mv -i'

# Source global definitions

if [ -f /etc/bashrc ]; then

        . /etc/bashrc

fi

#export JAVA_HOME=/usr/java/jdk1.8.0_271-i586

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

- This fixed the issue.

[root@katello ~]# mvn -version

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)

Maven home: /usr/local/src/apache-mvn

Java version: 11.0.9, vendor: Red Hat, Inc., runtime: /usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

Default locale: en_US, platform encoding: UTF-8

OS name: "linux", version: "3.10.0-1127.19.1.el7.x86_64", arch: "amd64", family: "unix"

[root@katello ~]# date

Tue Dec  8 11:54:27 IST 2020

Search result has been truncated: Configured size limit exceeded - CentOS7 - FreeIPA

Ran into this error "Search result has been truncated: Configured size limit exceeded - CentOS7 - FreeIPA" while searching all hosts enrolled with FreeIPA - but the serach results were limited to 500 hosts, whereas our database had more than 800.

# ipa config-mod --searchrecordslimit=1000
# ipa host-find --all  | grep "Host name" > /tmp/ldap-all-hosts.txt

Install .dmg package on MacOS Catalina.

Example with Vagrant package.

* Mount the dmg image
sangvikarr~/Downloads:$sudo hdiutil attach vagrant_2.2.6_x86_64.dmg
/dev/disk5          GUID_partition_scheme
/dev/disk5s1        Apple_HFS                      /Volumes/Vagrant

* Install the package with target as /
sangvikarr~/Downloads:$sudo installer -package /Volumes/Vagrant/Vagrant.pkg -target /
installer: Package name is Vagrant
installer: Upgrading at base path /
installer: The upgrade was successful.

* Finally detach the image.
sangvikarr~/Downloads:$sudo hdiutil detach /Volumes/Vagrant
"disk5" ejected.

* sangvikarr~# vagrant version
Installed Version: 2.2.6
Latest Version: 2.2.6

You're running an up-to-date version of Vagrant!

sangvikarr~# cd
sangvikarr# which vagrant
/usr/local/bin/vagrant