i have tried the following commands to check the zookeeper health and its corresponding error i am getting 1. sh -c zookeeper-ready 2181 (error: zookeeper-ready command not found) 2. i have tried all echo commands (error: it is not a file) 3. /apache-zookeeper-3.5.5-bin/bin/zkServer.sh start (error: cannot be able to start) 4. /apache-zookeeper-3.5.5-bin/bin/zkServer.sh stop (error: zookeeper stopping ...... there is no zookeeper to stop) 5. /apache-zookeeper-3.5.5-bin/bin/zkServer.sh status (error: when i am stopping the zookeeper the probe needs to fail for this command but it is not happening. it needs to be done)
and i have used these commands in go file as
LivenessProbe: &corev1.Probe{
Handler: corev1.Handler{
Exec: &corev1.ExecAction{
Command: []string{"sh",
"/apache-zookeeper-3.5.5-bin/bin/zkServer.sh" ,
"status",
},
},
},
InitialDelaySeconds: 30,
TimeoutSeconds: 5,
},
ReadinessProbe: &corev1.Probe{
Handler: corev1.Handler{
Exec: &corev1.ExecAction{
Command: []string{
"sh",
"/apache-zookeeper-3.5.5-bin/bin/zkServer.sh" ,
"status",
},
},
},
InitialDelaySeconds: 30,
TimeoutSeconds: 5,
},
To check liveness and readiness for zookeeper you can use following command
echo "ruok" | timeout 2 nc -w 2 localhost 2181 | grep imok
but make sure to set the env variable ZOO_4LW_COMMANDS_WHITELIST=rouk other wise the the check will fail.
You have to configure
livenessProbe:
exec:
command: ['/bin/bash', '-c', 'echo "ruok" | nc -w 2 localhost 2181 | grep imok']
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 5
failureThreshold: 6
successThreshold: 1
readinessProbe:
exec:
command: ['/bin/bash', '-c', 'echo "ruok" | nc -w 2 localhost 2181 | grep imok']
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 5
failureThreshold: 6
successThreshold: 1For ruok,
Plain kafka
You need to set env. variable
ZOO_4LW_COMMANDS_WHITELIST=rouk
Confluent kafka
KAFKA_OPTS=-Dzookeeper.4lw.commands.whitelist=ruok
Also, You have to change the podManagementPolicy=parallel to start parallel