4. Record metrics from a remote system

1. Setup instructions for client systems

   • Install required packages:

   # yum -y install pcp
   

   • Allow incoming connections on TCP/44321:

   # firewall-cmd --permanent --zone=public --add-port=44321/tcp
   # firewall-cmd --reload
   

   • Ensure that PMCD talks to the outer world:

   #  if grep -q ^PMCD_LOCAL /etc/sysconfig/pmcd; then
         sed -ie 's,PMCD_LOCAL.*,PMCD_LOCAL=0,' /etc/sysconfig/pmcd
      else
         echo 'PMCD_LOCAL=0' >>/etc/sysconfig/pmcd
      fi
   # grep ^PMCD_LOCAL /etc/sysconfig/pmcd
   PMCD_LOCAL=0
   

   • Restart & activate PMCD:

   # systemctl restart pmcd
   # systemctl enable pmcd
   

2. Setup instructions for master (collector) system

   • Install required packages:

   # yum -y install pcp-zeroconf
   

   • Create a default config for the clients:

   # CLIENT='rhel7u8a'
   # /usr/libexec/pcp/bin/pmlogconf /var/lib/pcp/config/pmlogger/config.$CLIENT
   

   • Optionally: execute again, to customize:

   # /usr/libexec/pcp/bin/pmlogconf /var/lib/pcp/config/pmlogger/config.$CLIENT
   

   • Create the controller config for the client:

   # echo "$CLIENT.local n n PCP_LOG_DIR/pmlogger/$CLIENT.local" " -r -T30d -c config.$CLIENT" \
   >/etc/pcp/pmlogger/control.d/$CLIENT
   

   • Restart pmlogger:

   # /usr/libexec/pcp/bin/pmlogger_check
   

3. Verify data collection on master (collector) system

   # pcp
   
   Performance Co-Pilot configuration on rhel8u2a.local:
   platform: Linux rhel8u2a.local 4.18.0-167.el8.x86_64 #1 SMP Sun [..] 2019 x86_64
   hardware: 4 cpus, 1 disk, 1 node, 3938MB RAM
   timezone: CET-1
   services: pmcd
   pmcd: Version 5.0.2-1, 11 agents, 4 clients
   pmda: root pmcd proc pmproxy xfs linux nfsclient mmv kvm jbd2 dm
   pmlogger: primary logger: /var/log/pcp/pmlogger/rhel8u2a.local/20200317.05.32
   rhel7u8a: /var/log/pcp/pmlogger/rhel7u8a.local/20200317.06.20
   pmie: primary engine: /var/log/pcp/pmie/rhel8u2a.local/pmie.log