Lab 5.3 with fluentd is too confusing?
Hello,
While doing lab 5.3 I was disappointed to see how I found it confusing.
As a beginner it took me some time to understand the objective.
I think I saw several mistakes and I would propose following modifications:
FLUENT_CONF env var is not working
Better to use
command: ["fluentd"] args: ["-c", "/etc/fluentd-config/fluentd.conf"]
We can see even coursebook is wrong
In the sample given in step 15
, the config file path is incorrect!!
student@ckad-1:~$ kubectl logs basicpod fdlogger 2019-03-06 18:55:33 +0000 [info]: parsing config file is succeeded path="/fluentd/etc/fluent.conf"
They should read the ConfigMap content at /etc/fluentd-config/fluentd.conf
and not default config at /fluentd/etc/fluent.conf
ConfigMap is incorrect
- Mountpoint given in step 11 is incorrect should be /var/log/access.log instead of /var/log/nginx/access.log
- The
@type forward
type is not relevant and leads to error, use@type stdout
instead?
echo ' apiVersion: v1 kind: ConfigMap metadata: name: fluentd-config data: fluentd.conf: | <source> @type tail format none path /var/log/access.log # <- we were pointing to wrong mount point /var/log/nginx/access.log in step 11 tag count.format1 </source> <match *.**> # <- we were doing a forward to server which shows nothing @type stdout </match> ' > weblog-configmap.yaml
I propose following modif from step 5.3.11 (I use deployment but pod is fine)
echo ' apiVersion: v1 kind: ConfigMap metadata: name: fluentd-config data: fluentd.conf: | <source> @type tail format none path /var/log/access.log tag count.format1 </source> <match *.**> @type stdout </match> ' > weblog-configmap.yaml k create -f weblog-configmap.yaml
And modify deployment as follows
echo ' apiVersion: apps/v1 kind: Deployment metadata: creationTimestamp: null labels: app: basic name: basic spec: replicas: 1 selector: matchLabels: app: basic strategy: {} template: metadata: creationTimestamp: null labels: app: basic spec: volumes: - name: weblog-pv-storage persistentVolumeClaim: claimName: weblog-pv-claim - name: log-config configMap: name: fluentd-config containers: - image: nginx name: nginx ports: - containerPort: 80 volumeMounts: - mountPath: "/var/log/nginx" name: weblog-pv-storage - image: fluent/fluentd command: ["fluentd"] args: ["-c", "/etc/fluentd-config/fluentd.conf", "--verbose"] name: fdlogger volumeMounts: - mountPath: "/var/log" name: weblog-pv-storage - mountPath: "/etc/fluentd-config" name: log-config ' > basic3.yaml k create -f basic3.yaml
Then we can tail the logs
export POD_NAME=$(k get pods -o wide | grep "basic-" | awk '{ print $1 }') k logs -f $POD_NAME fdlogger vagrant@k8sMaster:~$ k logs $POD_NAME fdlogger | grep access path "/var/log/access.log" 2020-02-13 19:08:22 +0000 [info]: #0 following tail of /var/log/access.log
Then in a separate window do:
export POD_IP=$(k get pods -o wide | grep "basic-" | awk '{ print $6 }') echo $POD_IP watch -n1 curl $POD_IP
And it appears in first window:
2020-02-13 19:56:12.855010348 +0000 count.format1: {"message":"10.0.2.15 - - [13/Feb/2020:19:56:12 +0000] \"GET / HTTP/1.1\" 200 612 \"-\" \"curl/7.58.0\" \"-\""} 2020-02-13 19:56:13.856553408 +0000 count.format1: {"message":"10.0.2.15 - - [13/Feb/2020:19:56:13 +0000] \"GET / HTTP/1.1\" 200 612 \"-\" \"curl/7.58.0\" \"-\""}
Am I wrong, did I miss something? What do you think?
Thanks for the help,
Cheers,
Sylvain
Comments
-
Hello,
Thank you for the feedback. We'll investigate the matter and update the material as necessary.
Thank you,
0
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