I am using telepresence to remote debugging the kubernetes cluster, and I am log in cluster using command:
telepresence
but when I want to install some software in the telepresence pod:
sudo apt-get install wget
and I did not know the password of telepresence pod, so what should I do to install software?
you could using this script to login pod as root:
#!/usr/bin/env bash
set -xe
POD=$(kubectl describe pod "$1")
NODE=$(echo "$POD" | grep -m1 Node | awk -F'/' '{print $2}')
CONTAINER=$(echo "$POD" | grep -m1 'Container ID' | awk -F 'docker://' '{print $2}')
CONTAINER_SHELL=${2:-bash}
set +e
ssh -t "$NODE" sudo docker exec --user 0 -it "$CONTAINER" "$CONTAINER_SHELL"
if [ "$?" -gt 0 ]; then
set +x
echo 'SSH into pod failed. If you see an error message similar to "executable file not found in $PATH", please try:'
echo "$0 $1 sh"
fi
login like this:
./login-k8s-pod.sh flink-taskmanager-54d85f57c7-wd2nb
Related
I am having an odd issue with Ansible and connecting to a host (any host) and hoping someone can see something I'm not. I can ssh directly to the host w/o any issue. I can run -m ping w/o issue. But that's where success ends. If I run a -m setup it appears to connect and gather some info, but subsequent connections fail.
This is a server spun up on Proxmox (7.2.11). I've done this 100's of times w/o issue. That's why I can't seen to identify what has changed. I typically spin up a container and set up w/ a ssh key (requiring passphrase) for root. If a VM, I simply copy the public key to the root users authorized_keys. Then run ansible playbook to add the user(s) and services along with locking down ssh. So my playbooks initially run using the root user. Ansible has always prompted for the passphrase and then go along it's merry way.
I'm using pipelining, but I've set to false in testing.
Appreciate any insight you may have... Thank you
Here's the output of a simple gather facts. You can see that the first two SSH: EXEC return a result, but the third connection hangs.
➜ ansible git:(main) ✗ ansible all -vvv -i ./inventory.yml -m setup
ansible 2.10.8
config file = /home/johndoe/NAS1-Mounts/Code/ansible/ansible.cfg
configured module search path = ['/home/johndoe/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
ansible python module location = /usr/lib/python3/dist-packages/ansible
executable location = /usr/bin/ansible
python version = 3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]
Using /home/johndoe/NAS1-Mounts/Code/ansible/ansible.cfg as config file
host_list declined parsing /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml as it did not pass its verify_file() method
script declined parsing /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml as it did not pass its verify_file() method
Parsed /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml inventory source with ini plugin
Skipping callback 'default', as we already have a stdout callback.
Skipping callback 'minimal', as we already have a stdout callback.
Skipping callback 'oneline', as we already have a stdout callback.
META: ran handlers
<target_server> Attempting python interpreter discovery
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'echo PLATFORM; uname; echo FOUND; command -v '"'"'"'"'"'"'"'"'/usr/bin/python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.9'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.8'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.5'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/libexec/platform-python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/bin/python3'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python'"'"'"'"'"'"'"'"'; echo ENDFOUND && sleep 0'"'"''
<10.2.0.27> (0, b'PLATFORM\nLinux\nFOUND\n/usr/bin/python3\nENDFOUND\n', b'')
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'/usr/bin/python3 && sleep 0'"'"''
<10.2.0.27> (0, b'{"platform_dist_result": [], "osrelease_content": "PRETTY_NAME=\\"Ubuntu 22.04.1 LTS\\"\\nNAME=\\"Ubuntu\\"\\nVERSION_ID=\\"22.04\\"\\nVERSION=\\"22.04.1 LTS (Jammy Jellyfish)\\"\\nVERSION_CODENAME=jammy\\nID=ubuntu\\nID_LIKE=debian\\nHOME_URL=\\"https://www.ubuntu.com/\\"\\nSUPPORT_URL=\\"https://help.ubuntu.com/\\"\\nBUG_REPORT_URL=\\"https://bugs.launchpad.net/ubuntu/\\"\\nPRIVACY_POLICY_URL=\\"https://www.ubuntu.com/legal/terms-and-policies/privacy-policy\\"\\nUBUNTU_CODENAME=jammy\\n"}\n', b'')
Using module file /usr/lib/python3/dist-packages/ansible/modules/setup.py
Pipelining is enabled.
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'/usr/bin/python3 && sleep 0'"'"''
^C [ERROR]: User interrupted execution
➜ ansible git:(main) ✗
-m ping
➜ ansible git:(main) ✗ ansible all -vvv -i ./inventory.yml -m ping
ansible 2.10.8
config file = /home/johndoe/NAS1-Mounts/Code/ansible/ansible.cfg
configured module search path = ['/home/johndoe/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
ansible python module location = /usr/lib/python3/dist-packages/ansible
executable location = /usr/bin/ansible
python version = 3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]
Using /home/johndoe/NAS1-Mounts/Code/ansible/ansible.cfg as config file
host_list declined parsing /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml as it did not pass its verify_file() method
script declined parsing /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml as it did not pass its verify_file() method
Parsed /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml inventory source with ini plugin
Skipping callback 'default', as we already have a stdout callback.
Skipping callback 'minimal', as we already have a stdout callback.
Skipping callback 'oneline', as we already have a stdout callback.
META: ran handlers
<target_server> Attempting python interpreter discovery
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'echo PLATFORM; uname; echo FOUND; command -v '"'"'"'"'"'"'"'"'/usr/bin/python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.9'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.8'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.5'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/libexec/platform-python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/bin/python3'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python'"'"'"'"'"'"'"'"'; echo ENDFOUND && sleep 0'"'"''
<10.2.0.27> (0, b'PLATFORM\nLinux\nFOUND\n/usr/bin/python3\nENDFOUND\n', b'')
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'/usr/bin/python3 && sleep 0'"'"''
<10.2.0.27> (0, b'{"platform_dist_result": [], "osrelease_content": "PRETTY_NAME=\\"Ubuntu 22.04.1 LTS\\"\\nNAME=\\"Ubuntu\\"\\nVERSION_ID=\\"22.04\\"\\nVERSION=\\"22.04.1 LTS (Jammy Jellyfish)\\"\\nVERSION_CODENAME=jammy\\nID=ubuntu\\nID_LIKE=debian\\nHOME_URL=\\"https://www.ubuntu.com/\\"\\nSUPPORT_URL=\\"https://help.ubuntu.com/\\"\\nBUG_REPORT_URL=\\"https://bugs.launchpad.net/ubuntu/\\"\\nPRIVACY_POLICY_URL=\\"https://www.ubuntu.com/legal/terms-and-policies/privacy-policy\\"\\nUBUNTU_CODENAME=jammy\\n"}\n', b'')
Using module file /usr/lib/python3/dist-packages/ansible/modules/ping.py
Pipelining is enabled.
<10.2.0.27> ESTABLISH SSH CONNECTION FOR USER: root
<10.2.0.27> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/home/johndoe/.dotfiles/ansible/.ansible/cp/27e670244a 10.2.0.27 '/bin/sh -c '"'"'/usr/bin/python3 && sleep 0'"'"''
<10.2.0.27> (0, b'\n{"ping": "pong", "invocation": {"module_args": {"data": "pong"}}}\n', b'')
target_server | SUCCESS => {
"ansible_facts": {
"discovered_interpreter_python": "/usr/bin/python3"
},
"changed": false,
"invocation": {
"module_args": {
"data": "pong"
}
},
"ping": "pong"
}
META: ran handlers
META: ran handlers
ansible.cfg
➜ ansible git:(main) ✗ cat ansible.cfg
[default]
inventory = /home/johndoe/NAS1-Mounts/Code/ansible/inventory.yml
# Use the Beautiful Output callback plugin.
stdout_callback = beautiful_output
# Use specific ssh key and user
# ed25519 w/ passphrase
private_key = /home/johndoe/.ssh/johndoe_default
host_key_checking = False
# For updates/maintenance as sudo user
remote_user = johndoe
# Set remote host working directory
remote_tmp = ~/.ansible/tmp
# Misc
allow_world_readable_tmpfiles = True
display_skipped_hosts = False
# display_args_to_stdout = True
# stdout_callback = full_skip
transport = ssh
[ssh_connection]
pipelining = True
timeout = 30
[connection]
pipelining = True
my inventory.yml
➜ ansible git:(main) ✗ cat inventory.yml
# Vagrant Host
#default
[workstation]
[server]
target_server ansible_user=root ansible_host=10.2.0.27 install_docker=true
[pve_container]
my .ssh/config file
➜ ansible git:(main) ✗ cat ~/.ssh/config
# Defaults
Host *
# Default ed25519 Keypair for all connections - unless otherwise specified
IdentityFile ~/.ssh/johndoe_default
IdentitiesOnly yes
# Always use multiplex'd sessions - unless otherwise specified in host def below
Controlmaster auto
ControlPersist yes
Controlpath /tmp/ssh-%r#%h:%p
ControlPersist 10m
ssh directly to host
➜ ansible git:(main) ✗ ssh root#10.2.0.27
Welcome to Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-56-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Wed Dec 14 05:06:20 PM UTC 2022
System load: 0.0 Processes: 117
Usage of /: 31.8% of 14.66GB Users logged in: 1
Memory usage: 11% IPv4 address for ens18: 10.2.0.27
Swap usage: 0%
50 updates can be applied immediately.
To see these additional updates run: apt list --upgradable
Last login: Wed Dec 14 17:05:53 2022 from 10.0.2.5
root#ubuntu-ansible-test:~#
My apologies for wasting anyone's time. My issue turned out to be a MTU issue with the Tunnel to the remote site. Someone set it up with 1500 on the wireguard tunnel. A packet capture pcap showed a bunch of TCP Out or order, TCP Dup ACK and TCP Retransmission. Setting back to 1420 cured the issue.
Best
Using crictl an containerd, is there an easy way to find to which pod/container belongs a given process, using it's PID` on the host machine?
For example, how can I retrieve the name of the pod which runs the process below (1747):
root#k8s-worker-node:/# ps -ef | grep mysql
1000 1747 1723 0 08:58 ? 00:00:01 mysqld
Assuming that you're looking at the primary process in a pod, you could do something like this:
crictl ps -q | while read cid; do
if crictl inspect -o go-template --template '{{ .info.pid }}' $cid | grep -q $target_pid; then
echo $cid
fi
done
This walks through all the crictl managed pods and checks the pod pid against the value of the $target_pid value (which you have set beforehand to the host pid in which you are interested).
1. Using pid2pod
pid2pod is a dedicated tool: https://github.com/k8s-school/pid2pod
Example:
# Install
$ curl -Lo ./pid2pod https://github.com/k8s-school/pid2pod/releases/download/v0.0.1/pid2pod-linux-amd64
$ chmod +x ./pid2pod
$ mv ./pid2pod /some-dir-in-your-PATH/pid2pod
# Run
$ ./pid2pod 1525
NAMESPACE POD CONTAINER PRIMARY PID
kube-system calico-node-6kt29 calico-node 1284
2. Using sysdig OSS
Install sysdig and run:
sudo csysdig -pc
You'll get something in the htop's style:
3. Custom script
Using #Iarsks answer, I propose a solution based on command belown which provides the pod name for a given PID:
$ pid=1254
$ nsenter -t $pid -u hostname
coredns-558bd4d5db-rxz9r
This solution display namespace, pod, container and container's primary PID. It is possible to copy paste the script below in a file named get_pid.sh and then run ./get_pid.sh 2345 for example.
#!/bin/bash
# Display pod information about a process, using its host PID as input
set -euo pipefail
usage() {
cat << EOD
Usage: `basename $0` PID
Available options:
-h this message
Display pod information about a process, using its host PID as input:
- display namespace, pod, container, and primary process pid for this container if the process is running in a pod
- else exit with code 1
EOD
}
if [ $# -ne 1 ] ; then
usage
exit 2
fi
pid=$1
is_running_in_pod=false
pod=$(nsenter -t $pid -u hostname 2>&1)
if [ $? -ne 0 ]
then
printf "%s %s:\n %s" "nsenter command failed for pid" "$pid" "$pod"
fi
cids=$(crictl ps -q)
for cid in $cids
do
current_pod=$(crictl inspect -o go-template --template '{{ index .info.config.labels "io.kubernetes.pod.name"}}' "$cid")
if [ "$pod" == "$current_pod" ]
then
tmpl='NS:{{ index .info.config.labels "io.kubernetes.pod.namespace"}} POD:{{ index .info.config.labels "io.kubernetes.pod.name"}} CONTAINER:{{ index .info.config.labels "io.kubernetes.container.name"}} PRIMARY PID:{{.info.pid}}'
crictl inspect --output go-template --template "$tmpl" "$cid"
is_running_in_pod=true
break
fi
done
if [ "$is_running_in_pod" = false ]
then
echo "Process $pid is not running in a pod."
exit 1
fi
WARNING: this solution does not work if two pods have the same name (even in different namespaces)
Instruction page says as:-
Install the Confluent Cloud CLI
Run this command to install the Confluent Cloud CLI.
curl -L --http1.1 https://cnfl.io/ccloud-cli | sh -s -- -b /usr/local/bin
it failed for permission
"install: cannot create regular file '/usr/local/bin/ccloud':
Permission denied"
Even if I tried
sudo curl -L --http1.1 https://cnfl.io/ccloud-cli | sh -s -- -b /usr/local/bin
Same error. How do I install it?
Well, I installed it as:-
curl -L --http1.1 https://cnfl.io/ccloud-cli | sh -s -- -b ~/Downloads/
After the above command
sudo mv ~/Downloads/ccloud /usr/local/bin/
Everything is fine now.
Hey I'm running a kubernetes cluster and I want to run a command on all pods that belong to a specific service.
As far as I know kubectl exec can only run on a pod and tracking all my pods is a ridiculous amount of work (which is one of the benefits of services).
Is there any way or tool that gives you the ability to "broadcast" to all pods in a service?
Thanks in advance for your help!
Here's a simple example with kubectl pipe to xargs, printing env of each pod:
k get pod \
-l {your label selectors} \
--field-selector=status.phase=Running \
-o custom-columns=name:metadata.name --no-headers \
| xargs -I{} kubectl exec {} env
As Bal Chua wrote, kubectl has no way to do this, but you can use bash script to do this:
#!/usr/bin/env bash
PROGNAME=$(basename $0)
function usage {
echo "usage: $PROGNAME [-n NAMESPACE] [-m MAX-PODS] -s SERVICE -- COMMAND"
echo " -s SERVICE K8s service, i.e. a pod selector (required)"
echo " COMMAND Command to execute on the pods"
echo " -n NAMESPACE K8s namespace (optional)"
echo " -m MAX-PODS Max number of pods to run on (optional; default=all)"
echo " -q Quiet mode"
echo " -d Dry run (don't actually exec)"
}
function header {
if [ -z $QUIET ]; then
>&2 echo "###"
>&2 echo "### $PROGNAME $*"
>&2 echo "###"
fi
}
while getopts :n:s:m:qd opt; do
case $opt in
d)
DRYRUN=true
;;
q)
QUIET=true
;;
m)
MAX_PODS=$OPTARG
;;
n)
NAMESPACE="-n $OPTARG"
;;
s)
SERVICE=$OPTARG
;;
\?)
usage
exit 0
;;
esac
done
if [ -z $SERVICE ]; then
usage
exit 1
fi
shift $(expr $OPTIND - 1)
while test "$#" -gt 0; do
if [ "$REST" == "" ]; then
REST="$1"
else
REST="$REST $1"
fi
shift
done
if [ "$REST" == "" ]; then
usage
exit 1
fi
PODS=()
for pod in $(kubectl $NAMESPACE get pods --output=jsonpath={.items..metadata.name}); do
echo $pod | grep -qe "^$SERVICE" >/dev/null 2>&1
if [ $? -eq 0 ]; then
PODS+=($pod)
fi
done
if [ ${#PODS[#]} -eq 0 ]; then
echo "service not found in ${NAMESPACE:-default}: $SERVICE"
exit 1
fi
if [ ! -z $MAX_PODS ]; then
PODS=("${PODS[#]:0:$MAX_PODS}")
fi
header "{pods: ${#PODS[#]}, command: \"$REST\"}"
for i in "${!PODS[#]}"; do
pod=${PODS[$i]}
header "{pod: \"$(($i + 1))/${#PODS[#]}\", name: \"$pod\"}"
if [ "$DRYRUN" != "true" ]; then
kubectl $NAMESPACE exec $pod -- $REST
fi
done
Here:
kubectl -n alex get pods -l app=alex-admin-api -o name | xargs -I{} kubectl -n alex exec {} -- cat alexAdminApi.log >> alex-admin-api_pods.logs
I have written a simple kubectl plugin that "boardcast"s commands to all pods, using Tmux. Assuming that all your pods in the service should share the same labels in their spec, app=foobar for instance, you can use the command below,
kubectl tmux-exec -l app=foobar bash
The plugin is available on Github: predatorray/kubectl-tmux-exec. Hope it will help you!
there is also a kubectl plugin called kubectl-exec-all https://github.com/jpdasma/kubectl-exec-all that is doing a good job.
Can't work with krew index but you can save the content of https://raw.githubusercontent.com/jpdasma/kubectl-exec-all/master/unix/exec-all.sh to /usr/local/bin/kubectl-exec_all and don't forget to make it executable by running
chmod +x /usr/local/bin/kubectl-exec_all
then it work like this:
kubectl plugin exec-all daemonset docker-daemon -- docker system prune -a -f
I'm writing a shell script which needs to login into the pod and execute a series of commands in a kubernetes pod.
Below is my sample_script.sh:
kubectl exec octavia-api-worker-pod-test -c octavia-api bash
unset http_proxy https_proxy
mv /usr/local/etc/octavia/octavia.conf /usr/local/etc/octavia/octavia.conf-orig
/usr/local/bin/octavia-db-manage --config-file /usr/local/etc/octavia/octavia.conf upgrade head
After running this script, I'm not getting any output.
Any help will be greatly appreciated
Are you running all these commands as a single line command? First of all, there's no ; or && between those commands. So if you paste it as a multi-line script to your terminal, likely it will get executed locally.
Second, to tell bash to execute something, you need: bash -c "command".
Try running this:
$ kubectl exec POD_NAME -- bash -c "date && echo 1"
Wed Apr 19 19:29:25 UTC 2017
1
You can make it multiline like this:
$ kubectl exec POD_NAME -- bash -c "date && \
echo 1 && \
echo 2"
The following should work
kubectl -it exec podname -- bash -c "ls && ls"
bin dev etc home proc root run sys tmp usr var bin
dev etc home proc root run sys tmp usr var
If above command doesn't work then try too replace bash with one of the following /bin/bash, sh or /bin/sh
-t
can solve your task
For example, I run here few cmd:
kubectl get pods |grep nginx|cut -f1 -d\ |\
while read pod; \
do echo "$pod writing:";\
kubectl exec -t $pod -- bash -c \
"dd if=/dev/zero of=/feeds/test.bin bs=260K count=4 2>&1|\
grep copi |cut -d, -f4; \
a=$SECONDS; echo -ne 'reading:'; cat /feeds/test.bin >/dev/null ; \
let a=SECONDS-a ; \
echo $a sec"
done
p.s. your example will be:
kubectl exec -t octavia-api-worker-pod-test -c octavia-api -- bash -c "unset http_proxy https_proxy ; mv /usr/local/etc/octavia/octavia.conf /usr/local/etc/octavia/octavia.conf-orig ; /usr/local/bin/octavia-db-manage --config-file /usr/local/etc/octavia/octavia.conf ; upgrade ; head"
Posting here because google search still brings you to this post...
I'd like to throw out using a HEREDOC as an additional possibility.
kubectl exec -i --tty-false PODNAME -- bash << EOF
echo "insert all your commands here."
echo "this subprocess will even pickup any variables you have in"
echo "the shell script that is calling this"
EOF