ovirt: Cannot authenticate user 'admin@internal': Unable to log in because the user account is disabled or locked. Contact the system administrator..

Tried to login with wrong password in Engine more than 3 times and I got:

Cannot authenticate user 'admin@internal': Unable to log in because the user account is disabled or locked. Contact the system administrator..

To unlock:

On Engine machine:

# ovirt-aaa-jdbc-tool user unlock admin

golang: execCommand example

// execCommand executes a command from cmdName with args

// provided from cmdArgs. Returns the stdout in []byte and error or nil

func execCommand(cmdName string, cmdArgs ...string) ([]byte, error) {

        logrus.Debugf("Executing: %s %s ", cmdName, cmdArgs)

        cmd := exec.Command(cmdName, cmdArgs...)

        stdout, err := cmd.Output()

        if err != nil {

                return nil, errors.Wrapf(err, "Error executing the command")

        }

        return stdout, nil

}

ovirt/rhev host: virsh (requiring user/password)

# virsh  capabilities 

Please enter your authentication name: vdsm@ovirt    

Please enter your password: shibboleth

<capabilities>

  <host>

    <uuid>ed618474-2399-47ce-90a7-0dadbee585dc</uuid>

    <cpu>

      <arch>x86_64</arch>

      <model>Broadwell-noTSX-IBRS</model>

      <vendor>Intel</vendor>

      <microcode version='180'/>

      <counter name='tsc' frequency='3503985000' scaling='no'/>

      <topology sockets='1' cores='2' threads='2'/>

      <feature name='vme'/>

      <feature name='ds'/>

      <feature name='acpi'/>

      <feature name='ss'/>

      <feature name='ht'/>

      <feature name='tm'/>

      <feature name='pbe'/>

      <feature name='dtes64'/>

      <feature name='monitor'/>

      <feature name='ds_cpl'/>

      <feature name='vmx'/>

      <feature name='est'/>

      <feature name='tm2'/>

      <feature name='xtpr'/>

      <feature name='pdcm'/>

      <feature name='osxsave'/>

      <feature name='f16c'/>

      <feature name='rdrand'/>

      <feature name='arat'/>

      <feature name='tsc_adjust'/>

      <feature name='mpx'/>

      <feature name='clflushopt'/>

      <feature name='intel-pt'/>

      <feature name='md-clear'/>

      <feature name='stibp'/>

      <feature name='ssbd'/>

      <feature name='xsaveopt'/>

      <feature name='xsavec'/>

      <feature name='xgetbv1'/>

      <feature name='xsaves'/>

      <feature name='pdpe1gb'/>

      <feature name='abm'/>

      <feature name='invtsc'/>

      <pages unit='KiB' size='4'/>

      <pages unit='KiB' size='2048'/>

      <pages unit='KiB' size='1048576'/>

    </cpu>

    <power_management>

      <suspend_mem/>

    </power_management>

    <iommu support='no'/>

    <migration_features>

      <live/>

      <uri_transports>

        <uri_transport>tcp</uri_transport>

        <uri_transport>rdma</uri_transport>

      </uri_transports>

    </migration_features>

    <topology>

      <cells num='1'>

        <cell id='0'>

          <memory unit='KiB'>33437624</memory>

          <pages unit='KiB' size='4'>8359406</pages>

          <pages unit='KiB' size='2048'>0</pages>

          <pages unit='KiB' size='1048576'>0</pages>

          <distances>

            <sibling id='0' value='10'/>

          </distances>

          <cpus num='4'>

            <cpu id='0' socket_id='0' core_id='0' siblings='0,2'/>

            <cpu id='1' socket_id='0' core_id='1' siblings='1,3'/>

            <cpu id='2' socket_id='0' core_id='0' siblings='0,2'/>

            <cpu id='3' socket_id='0' core_id='1' siblings='1,3'/>

          </cpus>

        </cell>

      </cells>

    </topology>

    <cache>

      <bank id='0' level='3' type='both' size='4' unit='MiB' cpus='0-3'/>

    </cache>

    <secmodel>

      <model>selinux</model>

      <doi>0</doi>

      <baselabel type='kvm'>system_u:system_r:svirt_t:s0</baselabel>

      <baselabel type='qemu'>system_u:system_r:svirt_tcg_t:s0</baselabel>

    </secmodel>

    <secmodel>

      <model>dac</model>

      <doi>0</doi>

      <baselabel type='kvm'>+107:+107</baselabel>

      <baselabel type='qemu'>+107:+107</baselabel>

    </secmodel>

  </host>

  <guest>

    <os_type>hvm</os_type>

    <arch name='i686'>

      <wordsize>32</wordsize>

      <emulator>/usr/libexec/qemu-kvm</emulator>

      <machine maxCpus='240'>pc-i440fx-rhel7.6.0</machine>

      <machine canonical='pc-i440fx-rhel7.6.0' maxCpus='240'>pc</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.6.0</machine>

      <machine canonical='pc-q35-rhel7.6.0' maxCpus='384'>q35</machine>

      <machine maxCpus='240'>rhel6.3.0</machine>

      <machine maxCpus='240'>rhel6.4.0</machine>

      <machine maxCpus='240'>rhel6.0.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.5.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>

      <machine maxCpus='255'>pc-q35-rhel7.3.0</machine>

      <machine maxCpus='240'>rhel6.5.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.4.0</machine>

      <machine maxCpus='240'>rhel6.6.0</machine>

      <machine maxCpus='240'>rhel6.1.0</machine>

      <machine maxCpus='240'>rhel6.2.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.5.0</machine>

      <domain type='qemu'/>

      <domain type='kvm'>

        <emulator>/usr/libexec/qemu-kvm</emulator>

      </domain>

    </arch>

    <features>

      <cpuselection/>

      <deviceboot/>

      <disksnapshot default='on' toggle='no'/>

      <acpi default='on' toggle='yes'/>

      <apic default='on' toggle='no'/>

      <pae/>

      <nonpae/>

    </features>

  </guest>

  <guest>

    <os_type>hvm</os_type>

    <arch name='x86_64'>

      <wordsize>64</wordsize>

      <emulator>/usr/libexec/qemu-kvm</emulator>

      <machine maxCpus='240'>pc-i440fx-rhel7.6.0</machine>

      <machine canonical='pc-i440fx-rhel7.6.0' maxCpus='240'>pc</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.6.0</machine>

      <machine canonical='pc-q35-rhel7.6.0' maxCpus='384'>q35</machine>

      <machine maxCpus='240'>rhel6.3.0</machine>

      <machine maxCpus='240'>rhel6.4.0</machine>

      <machine maxCpus='240'>rhel6.0.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.5.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>

      <machine maxCpus='255'>pc-q35-rhel7.3.0</machine>

      <machine maxCpus='240'>rhel6.5.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.4.0</machine>

      <machine maxCpus='240'>rhel6.6.0</machine>

      <machine maxCpus='240'>rhel6.1.0</machine>

      <machine maxCpus='240'>rhel6.2.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>

      <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>

      <machine maxCpus='384'>pc-q35-rhel7.5.0</machine>

      <domain type='qemu'/>

      <domain type='kvm'>

        <emulator>/usr/libexec/qemu-kvm</emulator>

      </domain>

    </arch>

    <features>

      <cpuselection/>

      <deviceboot/>

      <disksnapshot default='on' toggle='no'/>

      <acpi default='on' toggle='yes'/>

      <apic default='on' toggle='no'/>

    </features>

  </guest>

</capabilities>

Need extra space in /tmp (tmpfs) ? From 10G to 50G

mount -o remount,size=50G,noatime /tmp

10 things I wish I knew before experiencing burnout

Good presentation about burnout: 10 things I wish I knew before experiencing burnout

openshift installer: get current version

   $ openshift-install version

openshift installer - monitoring bootstrap services

On bootstrap VM:

# journalctl -b -f -u release-image.service -u bootkube.service

Troubleshooting bootstrap: https://github.com/openshift/installer/blob/master/docs/user/troubleshootingbootstrap.md

create a quick pre-allocated file in linux (fallocate)

Create a quick pre-allocated file in Linux, use fallocate

 

rhel8 - how to enable FIPS 8

Red Hat Enterprise Linux 8 is designed to follow the FIPS 140-2 level 1 requirements for all of its core cryptographic components 

How to enable:

# fips-mode-setup --enable

# reboot

Disable:

# fips-mode-setup --disable
# reboot

Reference

git: delete a branch (locally and remote)

$ git branch -d ${LOCAL_BRANCH_NAME}
$ git push origin --delete ${REMOTE_BRANCH_NAME}

gitlab: working with non default ssh key pair paths

1. Set perm for ~/.ssh/config
$ chmod 644 ~/.ssh/config

2. Generate the rsa key
$ ssh-keygen -t rsa -b 2048 -C "${MY_EMAIL_ADDRESS}"

3. Add the new key to the ssh agent
$ ssh-add ~/.ssh/id_rsa_${MY_PRIVATE_KEY}

4. Set the configuration file for the gitlab host
$ cat ~/.ssh/config
Host gitlab.com
   PreferredAuthentications publickey
   IdentityFile ~/.ssh/id_rsa_${PRIVATE_KEY}
   User git

Ref: https://docs.gitlab.com/ee/ssh/#working-with-non-default-ssh-key-pair-paths