I've containerized server app running as a DaemonSet component in k8s cluster. And there is a containerized client running as a deploy component in the same cluster.
I'm using same logging mechanism for both client and server.
client code.
err := os.MkdirAll("/root/mahesh/logs/", 0777)
if err != nil {
log.Fatalf("error creating directory file: %v", err)
}
filename := filepath.Join("/root/mahesh/logs/", "client.log")
f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
log.SetOutput(f)
log.Println("LOG INITIALIZED and writing in file")
server code
err := os.MkdirAll("/root/mahesh/logs/", 0777)
if err != nil {
log.Fatalf("error creating directory file: %v", err)
}
filename := filepath.Join("/root/mahesh/logs/", "server.log")
f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
log.SetOutput(f)
log.Println("server/server:InitializeServer() LOG initialized")
client Persistent volume configuration,
spec:
containers:
- name: client
image: <client-image-name>:<image-tag>
volumeMounts:
- mountPath: /root/mahesh/logs
name: mydir
ports:
- containerPort: 50051
envFrom:
- configMapRef:
name: client-config
volumes:
- name: mydir
hostPath:
# Ensure the file directory is created.
path: /root/mahesh/logs
type: DirectoryOrCreate
nodeSelector:
node: ubuntu22
server daemonset file configuration for volume,
containers:
- name: server
image: <server-image-name>:<image-tag>
ports:
- containerPort: 50051
hostPort: 50051
envFrom:
- configMapRef:
name: server-config
volumeMounts:
- mountPath: /root/mahesh/logs
name: server-log
securityContext:
privileged: true
volumes:
- name: server-log
hostPath:
# Ensure the file directory is created.
path: /root/mahesh/logs
type: DirectoryOrCreate
When ever client restarted I can see after restart logs are properly appending to existing file as expected.
But in server, due to heavy load server gets restarted many times I expect the logs should append in the same file in log folder. But it didn't. After every restart log file also gets restarted, it seems.
So I couldn't debug further. How to resolve this issue?
