How to manually collect logs and detailed node information from a TKGI environment

Products

• VMware Tanzu Kubernetes Grid

Issue/Introduction

Symptoms:
How to manually collect logs and detailed node information from a TKGI environment

Resolution

The steps in this page will collect the following information

• Process, CPU, Memory, Network and Disk statistics
• Operating system logs
• All pods and container logs
• bosh job logs from the deployment selected
• These steps can be used with TKGI tile, Harbor Tile and TKGI deployed clusters

Workaround:

Generate script to gather node statistics

cat << EOF > $PWD/get-node-stats.sh
 
set -x
 
# Process/OS
sudo ulimit -a &> ulimit.out
sudo sysctl -a &> sysctl.out
sudo cat /proc/loadavg &> loadavg.out
sudo cat /proc/sys/kernel/threads-max &> threads-max.out
sudo ps -elf &> pself.out
sudo ps -elfT &> psthreads.out
sudo cat /proc/sys/fs/file-nr &> file-nr.out
sudo cat /proc/sys/fs/file-max &> file-max.out
sudo lsof -n &> lsof-n.out
sudo uname -a &> uname.out
sudo vmstat 1 5 &> vmstat.out
sudo sar -A &> sar-A.out
sudo pidstat -p ALL -T ALL -I -l -r  -t  -u &> pidstat.out
sudo cat /proc/vmstat &> proc-vmstat.out
 
# Memory
sudo ps -eo pid,ppid,cmd,vsz,fuser,%mem,%cpu --sort=-%mem | head -n 20 &> psmem.out
sudo cat /proc/meminfo &> mem-info.out
sudo vmstat -m &> vmstat-m.out
sudo cat /proc/slabinfo &> slabinfo.out
sudo slabtop -s c -o &> slabtop.out
sudo free -m &> free-m.out
sudo dmesg -H &> dmesg-H.out
 
# CPU
sudo ps -eo pid,ppid,cmd,vsz,fuser,%mem,%cpu --sort=-%cpu | head -n 20 &> pscpu.out
sudo cat /proc/cpuinfo &> cpuinfo.out
sudo cat /proc/softirqs &> softirqs.out
sudo cat /proc/interrupts &> interrupts.out
sudo lscpu &> lscpu.out
sudo uptime &> uptime.out
sudo mpstat 1 5 -P ALL &> mpstat-all.out
 
# Network
sudo netstat -lantupWe &> netstat-lantupWe.out
sudo netstat -i &> netstat-i.out
sudo netstat -s &> netstat-s.out
sudo ss -noemitaup &> ss-noemitaup.out
sudo cat /proc/net/dev &> proc-net-dev.out
sudo cat /proc/net/sockstat &> sockstat.out
sudo cat /proc/net/sockstat6 &> sockstat6.out
sudo ip addr &> ip-addr.out
sudo route -n &> route-n.out
sudo ip rule list &> ip-rule-list.out
sudo ip route show table all &> ip-show-table.out
sudo iptables -L -v -n --line-numbers &> iptables-all.out
sudo conntrack -L &> conntrack-L.out
sudo conntrack -S &> conntrack-S.out
 
# Disk/IO
sudo df -ih --total &> df-ih.out
sudo df -ah --total &> df-ah.out
sudo arp -an &> arp-an.out
sudo iostat 1 5 &> iostat.out
 
# Bundle Artifacts
sudo tar czvf /var/log/node-stats-\$(date +%F-%H-%M-%Z).tar.gz *.out
EOF

Collect Kubernetes Cluster Logs Using Bosh CLI

# Setup Bosh Deployment ID
export BOSH_LOG_DEPLOYMENT="service-instance_8e4c492e-daae-4e72-94fb-1f6430f7f4a7"

# Cluster control plane nodes log collection
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" master "sudo rm /tmp/get-node-stats.sh"
bosh scp -d "${BOSH_LOG_DEPLOYMENT}" $PWD/get-node-stats.sh master:/tmp/get-node-stats.sh
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" master "sudo install -C -m 775 -o vcap -g vcap /tmp/get-node-stats.sh /var/log/get-node-stats.sh"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" master "sudo bash /var/log/get-node-stats.sh"

# Cluster worker nodes log collection
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" worker "sudo rm /tmp/get-node-stats.sh"
bosh scp -d "${BOSH_LOG_DEPLOYMENT}" $PWD/get-node-stats.sh worker:/tmp/get-node-stats.sh
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" worker "sudo install -C -m 775 -o vcap -g vcap /tmp/get-node-stats.sh /var/log/get-node-stats.sh"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" worker "sudo bash /var/log/get-node-stats.sh"

# Setup for /var/log/ collection. This will include all relevant OS logs, sar data and customer application pod logs
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" master "sudo ln -s /var/log /var/vcap/sys/log/custom-varlog"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" worker "sudo ln -s /var/log /var/vcap/sys/log/custom-varlog"
bosh logs -d "${BOSH_LOG_DEPLOYMENT}"

# Important Step - Remove symlink for cleanup and executing the script next time
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" master "sudo rm /var/vcap/sys/log/custom-varlog"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" worker "sudo rm /var/vcap/sys/log/custom-varlog"

Collect TKGI Deployment Logs Using Bosh

export BOSH_LOG_DEPLOYMENT="pivotal-container-service-a3eb6951085e47e40419"

bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pivotal-container-service "sudo rm /tmp/get-node-stats.sh"
bosh scp -d "${BOSH_LOG_DEPLOYMENT}" $PWD/get-node-stats.sh pivotal-container-service:/tmp/get-node-stats.sh
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pivotal-container-service "sudo install -C -m 775 -o vcap -g vcap /tmp/get-node-stats.sh /var/log/get-node-stats.sh"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pivotal-container-service "sudo bash /var/log/get-node-stats.sh"

bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pks-db "sudo rm /tmp/get-node-stats.sh"
bosh scp -d "${BOSH_LOG_DEPLOYMENT}" $PWD/get-node-stats.sh pks-db:/tmp/get-node-stats.sh
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pks-db "sudo install -C -m 775 -o vcap -g vcap /tmp/get-node-stats.sh /var/log/get-node-stats.sh"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pks-db "sudo bash /var/log/get-node-stats.sh"

bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pivotal-container-service "sudo ln -s /var/log /var/vcap/sys/log/custom-varlog"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pks-db "sudo ln -s /var/log /var/vcap/sys/log/custom-varlog"
bosh logs -d "${BOSH_LOG_DEPLOYMENT}"

# Important Step - Remove symlink for cleanup and executing the script next time
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pivotal-container-service "sudo rm /var/vcap/sys/log/custom-varlog"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" pks-db "sudo rm /var/vcap/sys/log/custom-varlog"

Collect Harbor Deployment Logs Using Bosh

export BOSH_LOG_DEPLOYMENT="harbor-container-registry-d4601cf8b13de303f734"

bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" harbor-app "sudo rm /tmp/get-node-stats.sh"
bosh scp -d "${BOSH_LOG_DEPLOYMENT}" $PWD/get-node-stats.sh harbor-app:/tmp/get-node-stats.sh
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" harbor-app "sudo install -C -m 775 -o vcap -g vcap /tmp/get-node-stats.sh /var/log/get-node-stats.sh"
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" harbor-app "sudo bash /var/log/get-node-stats.sh"

bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" harbor-app "sudo ln -s /var/log /var/vcap/sys/log/custom-varlog"
bosh logs -d "${BOSH_LOG_DEPLOYMENT}"

# Important Step - Remove symlink for cleanup and executing the script next time
bosh ssh -d "${BOSH_LOG_DEPLOYMENT}" harbor-app "sudo rm /var/vcap/sys/log/custom-varlog"