Lab 1-C – Running Fluentd in a Kubernetes environment
Hello Chris,
I am using kubernetes 1.18.2 on an ubuntu machine. I am trying to install fluentd as per the lab guide with just different labels.
apiVersion: apps/v1
kind: DaemonSet
metadata:
labels:
app: fluentd
name: fluentd
spec:
selector:
matchLabels:
app: fluentd
template:
metadata:
labels:
app: fluentd
spec:
containers:
- image: fluent/fluentd:latest
name: fluentd
env:
- name: fluentd_conf
value: "fluentd-kube.conf"
volumeMounts:
- name: fluentd-conf
mountPath: /fluentd/etc
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
volumes:
- name: fluentd-conf
configMap:
name: fluentd-config
The daemonset is created but the pods fail with error as below.
k get pods
NAME READY STATUS RESTARTS AGE
fluentd-88cml 0/1 CrashLoopBackOff 1 13s
fluentd-wclzl 0/1 CrashLoopBackOff 1 13s
k logs fluentd-88cml
chown: /fluentd/etc/..2020_05_01_12_59_01.526506452/fluentd-kube.conf: Read-only file system
chown: /fluentd/etc/..2020_05_01_12_59_01.526506452: Read-only file system
chown: /fluentd/etc/..2020_05_01_12_59_01.526506452: Read-only file system
chown: /fluentd/etc/fluentd-kube.conf: Read-only file system
chown: /fluentd/etc/..data: Read-only file system
chown: /fluentd/etc: Read-only file system
chown: /fluentd/etc: Read-only file system
/usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/lib/fluent/supervisor.rb:760:in initialize': No such file or directory @ rb_sysopen - /fluentd/etc/fluent.conf (Errno::ENOENT) from /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/lib/fluent/supervisor.rb:760:in
open'
from /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/lib/fluent/supervisor.rb:760:in read_config' from /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/lib/fluent/supervisor.rb:477:in
run_supervisor'
from /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/lib/fluent/command/fluentd.rb:310:in <top (required)>' from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in
require'
from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require' from /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.3.2/bin/fluentd:8:in
'
from /usr/bin/fluentd:23:in load' from /usr/bin/fluentd:23:in
Could you please help.
Comments
-
Hi Calvin,
I was able to reproduce your issue using the yaml you provided. It looks like the environment variable
fluentd_conf
is in all lowercase. Fluentd expects this variable in all uppercase in order for it to register.What tipped me off to this error was the line was
No such file or directory @ rb_sysopen - /fluentd/etc/fluent.conf
, which indicates that the Fluentd daemonset is looking for the wrong config file.Here is the complete daemonset manifest I used:
apiVersion: apps/v1 kind: DaemonSet metadata: name: fluentd-ds labels: k8s-app: fluentd-logging version: v1 spec: selector: matchLabels: k8s-app: fluentd-logging template: metadata: labels: k8s-app: fluentd-logging version: v1 spec: tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule terminationGracePeriodSeconds: 30 containers: - name: fluentd-ds image: fluent/fluentd:latest resources: limits: memory: 200Mi env: - name: FLUENTD_CONF ### Must be uppercase value: "fluentd-kube.conf" volumeMounts: - name: fluentd-conf mountPath: /fluentd/etc volumes: - name: fluentd-conf configMap: name: fluentd-config
0 -
I figured it out myself. A very small mistake in declaring the environment variable. I used lowercase and i thought it would work
0
Categories
- All Categories
- 60 LFX Mentorship
- 113 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 321 Cloud Engineer IT Professional Program
- 142 Advanced Cloud Engineer IT Professional Program
- 55 DevOps Engineer IT Professional Program
- 68 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.3K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 176 LFD103 Class Forum
- 22 LFD121 Class Forum
- 2 LFD137 Class Forum
- 61 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 653 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 2 LFS145 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 12 LFS203 Class Forum
- 92 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 12 LFS244 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 143 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 106 LFS260 Class Forum
- 145 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 20 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 249 LFW211 Class Forum
- 177 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 907 Hardware
- 220 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 764 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 143 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 482 Linux System Administration
- 40 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 51 Web Management
- 72 Mobile Computing
- 25 Android
- 32 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 545 Off Topic
- 132 Introductions
- 223 Small Talk
- 22 Study Material
- 831 Programming and Development
- 282 Kernel Development
- 515 Software Development
- 974 Software
- 260 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)