Microk8s Ingress returns 502 - kubernetes

Question

I'm new at Kubernetes and trying to do a simple project to connect MySQL and PhpMyAdmin using Kubernetes on my Ubuntu 20.04. I created the components needed and here is the components.
mysql.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-deployment
labels:
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-secret
key: mysql-root-password
- name: MYSQL_USER
valueFrom:
secretKeyRef:
name: mysql-secret
key: mysql-user-username
- name: MYSQL_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-secret
key: mysql-user-password
- name: MYSQL_DATABASE
valueFrom:
configMapKeyRef:
name: mysql-configmap
key: mysql-database
---
apiVersion: v1
kind: Service
metadata:
name: mysql-service
spec:
selector:
app: mysql
ports:
- protocol: TCP
port: 3306
targetPort: 3306
phpmyadmin.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: phpmyadmin
labels:
app: phpmyadmin
spec:
replicas: 1
selector:
matchLabels:
app: phpmyadmin
template:
metadata:
labels:
app: phpmyadmin
spec:
containers:
- name: phpmyadmin
image: phpmyadmin
ports:
- containerPort: 3000
env:
- name: PMA_HOST
valueFrom:
configMapKeyRef:
name: mysql-configmap
key: database_url
- name: PMA_PORT
value: "3306"
- name: PMA_USER
valueFrom:
secretKeyRef:
name: mysql-secret
key: mysql-user-username
- name: PMA_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-secret
key: mysql-user-password
---
apiVersion: v1
kind: Service
metadata:
name: phpmyadmin-service
spec:
selector:
app: phpmyadmin
ports:
- protocol: TCP
port: 8080
targetPort: 3000
ingress-service.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-service
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /
spec:
defaultBackend:
service:
name: phpmyadmin-service
port:
number: 8080
rules:
- host: test.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: phpmyadmin-service
port:
number: 8080
when I execute microk8s kubectl get ingress ingress-service, the output is:
NAME CLASS HOSTS ADDRESS PORTS AGE
ingress-service public test.com 127.0.0.1 80 45s
and when I tried to access test.com, that's when I got 502 error.
My kubectl version:
Client Version: v1.22.2-3+9ad9ee77396805
Server Version: v1.22.2-3+9ad9ee77396805
My microk8s' client and server version:
Client:
Version: v1.5.2
Revision: 36cc874494a56a253cd181a1a685b44b58a2e34a
Go version: go1.15.15
Server:
Version: v1.5.2
Revision: 36cc874494a56a253cd181a1a685b44b58a2e34a
UUID: b2bf55ad-6942-4824-99c8-c56e1dee5949
As for my microk8s' own version, I followed the installation instructions from here, so it should be 1.21/stable. (Couldn't find the way to check the exact version from the internet, if someone know how, please tell me how)
mysql.yaml logs:
2021-10-14 07:05:38+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.26-1debian10 started.
2021-10-14 07:05:38+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2021-10-14 07:05:38+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.26-1debian10 started.
2021-10-14 07:05:38+00:00 [Note] [Entrypoint]: Initializing database files
2021-10-14T07:05:38.960693Z 0 [System] [MY-013169] [Server] /usr/sbin/mysqld (mysqld 8.0.26) initializing of server in progress as process 41
2021-10-14T07:05:38.967970Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-10-14T07:05:39.531763Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-10-14T07:05:40.591862Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2021-10-14T07:05:40.592247Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2021-10-14T07:05:40.670594Z 6 [Warning] [MY-010453] [Server] root#localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
2021-10-14 07:05:45+00:00 [Note] [Entrypoint]: Database files initialized
2021-10-14 07:05:45+00:00 [Note] [Entrypoint]: Starting temporary server
2021-10-14T07:05:45.362827Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.26) starting as process 90
2021-10-14T07:05:45.486702Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-10-14T07:05:45.845971Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-10-14T07:05:46.022043Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2021-10-14T07:05:46.022189Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2021-10-14T07:05:46.023446Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-10-14T07:05:46.023728Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-10-14T07:05:46.026088Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2021-10-14T07:05:46.044967Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /var/run/mysqld/mysqlx.sock
2021-10-14T07:05:46.045036Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.26' socket: '/var/run/mysqld/mysqld.sock' port: 0 MySQL Community Server - GPL.
2021-10-14 07:05:46+00:00 [Note] [Entrypoint]: Temporary server started.
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone1970.tab' as time zone. Skipping it.
2021-10-14 07:05:48+00:00 [Note] [Entrypoint]: Creating database testing-database
2021-10-14 07:05:48+00:00 [Note] [Entrypoint]: Creating user testinguser
2021-10-14 07:05:48+00:00 [Note] [Entrypoint]: Giving user testinguser access to schema testing-database
2021-10-14 07:05:48+00:00 [Note] [Entrypoint]: Stopping temporary server
2021-10-14T07:05:48.422053Z 13 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.0.26).
2021-10-14T07:05:50.543822Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.26) MySQL Community Server - GPL.
2021-10-14 07:05:51+00:00 [Note] [Entrypoint]: Temporary server stopped
2021-10-14 07:05:51+00:00 [Note] [Entrypoint]: MySQL init process done. Ready for start up.
2021-10-14T07:05:51.711889Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.26) starting as process 1
2021-10-14T07:05:51.725302Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-10-14T07:05:51.959356Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-10-14T07:05:52.162432Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2021-10-14T07:05:52.162568Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2021-10-14T07:05:52.163400Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-10-14T07:05:52.163556Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-10-14T07:05:52.165840Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2021-10-14T07:05:52.181516Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2021-10-14T07:05:52.181562Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.26' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
phpmyadmin.yaml logs:
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 10.1.114.139. Set the 'ServerName' directive globally to suppress this message
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 10.1.114.139. Set the 'ServerName' directive globally to suppress this message
[Thu Oct 14 03:57:32.653011 2021] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.51 (Debian) PHP/7.4.24 configured -- resuming normal operations
[Thu Oct 14 03:57:32.653240 2021] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND'
Here is also my Allocatable on describe nodes command:
Allocatable:
cpu: 4
ephemeral-storage: 113289380Ki
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 5904508Ki
pods: 110
and the Allocated resources:
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 550m (13%) 200m (5%)
memory 270Mi (4%) 370Mi (6%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-1Gi 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
Any help? Thanks in advance.

Answer 1

Turns out it is a fudged up mistake of mine, where I specify the phpmyadmin's container port to be 3000, while the default image port opens at 80. After changing the containerPort and phpmyadmin-service's targetPort to 80, it opens the phpmyadmin's page.
So sorry for kkopczak and AndD for the fuss and also big thanks for trying to help! :)