DobreMihaela's questions

I have 119Gb in sda2, but centos_template--centos7-root is only 27.8Gb, how can I increase it?

[root@runner~]# lsblk -o NAME,FSTYPE,LABEL,SIZE,MOUNTPOINT
NAME                              FSTYPE      LABEL  SIZE MOUNTPOINT
sda                                                  120G
├─sda1                            xfs                  1G /boot
└─sda2                            LVM2_member        119G
  ├─centos_template--centos7-root xfs               27.8G /
  └─centos_template--centos7-swap swap               3.2G [SWAP]

I have some free space unallocated and this problem affects more instances.

Number  Start   End     Size    Type     File system  Flags
        32.3kB  1049kB  1016kB           Free Space
 1      1049kB  1075MB  1074MB  primary  xfs          boot
 2      1075MB  34.4GB  33.3GB  primary               lvm
        34.4GB  53.7GB  19.3GB           Free Space

How can I fix this issue using shell scripting? It is impossible to do the operations using cfdisk on every instance.

sfdisk -l

[root@test ~]# sfdisk -l

Disk /dev/sda: 6527 cylinders, 255 heads, 63 sectors/track
Units: cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/sda1   *      0+    130-    131-   1048576   83  Linux
/dev/sda2        130+   4177-   4047-  32504832   8e  Linux LVM
/dev/sda3          0       -       0          0    0  Empty
/dev/sda4          0       -       0          0    0  Empty

Disk /dev/mapper/centos_template--centos7-root: 3758 cylinders, 255 heads, 63 sectors/track

Disk /dev/mapper/centos_template--centos7-swap: 417 cylinders, 255 heads, 63 sectors/track

pvs

[root@test ~]# pvs
  PV         VG                      Fmt  Attr PSize    PFree
  /dev/sda1  centos_template-centos7 lvm2 a--  1020.00m    0
  /dev/sda2  centos_template-centos7 lvm2 a--   <31.00g    0

[root@test ~]# vgdisplay
  --- Volume group ---
  VG Name               centos_template-centos7
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               31.99 GiB
  PE Size               4.00 MiB
  Total PE              8190
  Alloc PE / Size       8190 / 31.99 GiB
  Free  PE / Size       0 / 0
  VG UUID               OtZy5d-vzvd-ojJw-247H-Bzd7-Xezz-QCFFIu

I have a Kubernetes cluster which is running in a private cloud. I want to run some commands from another VM but I receive this:

[root@runner-tmp ~]# kubectl get pods --kubeconfig local-cluster.yaml
error: tls: failed to find any PEM data in certificate input

My local-cluster.yaml:

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: DATA+OMITTED
    server: https://x.x.x.x:6443
  name: kubernetes
contexts:
- context:
    cluster: kubernetes
    namespace: FSM
    user: kubernetes-admin
  name: kubernetes-admin@kubernetes
current-context: kubernetes-admin@kubernetes
kind: Config
preferences: {}
users:
- name: kubernetes-admin
  user:
    client-certificate-data: REDACTED
    client-key-data: REDACTED

Do you have any idea where should I specify this PEM certificate and how can I generate it?

I have the following ingress manifest file:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  namespace: fsm
  name: fsm
  labels:
    app: fsm
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /$2
    cert-manager.io/issuer: "letsencrypt-staging"
spec:
    tls:
    - hosts: 
      - k8s-cluster.int
      secretName: quickstart-example-tls
    rules:    
    - host: k8s-cluster.int
      http:
        paths:
          - path: /fsm(/|$)(.*)
            backend:
              serviceName: fsm
              servicePort: 8081

I am working with VMware with Vsphere. I don't have a domain like www.google.com, just a DNS name which is k8s-cluster and the domain .int (inside my company). When I am trying to generate the certificate I receive this error: "msg"="error waiting for authorization" "error"="acme: authorization error for k8s-cluster.int: 400 urn:ietf:params:acme:error:dns: DNS problem: NXDOMAIN looking up A for k8s-cluster.int - check that a DNS record exists for this domain" "dnsName"="k8s-cluster.int" "resource_kind"="Challenge" "resource_name"="quickstart-example-tls-w7vj9-4141989927-3312743172" "resource_namespace"="fsm" "resource_version"="v1" "type"="HTTP-01"

Can this problem appear because k8s-cluster.int is inside a intranet? If I curl k8s-cluster.int

<html>
<head><title>308 Permanent Redirect</title></head>
<body>
<center><h1>308 Permanent Redirect</h1></center>
<hr><center>nginx/1.19.1</center>
</body>
</html>

So, I think that the DNS works.