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Revert - Recursive chown the /etc/srv/sshproxy if kube-apiserver is running as non root. This way if a key already exists we will be able to read it.

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This commit is contained in:
Vinayak Goyal
2021-05-05 14:56:15 -07:00
parent 406ceae991
commit 6aa495ddc6
3 changed files with 13 additions and 23 deletions
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25
cluster/gce/gci/configure-helper.sh
View File

@@ -2043,18 +2043,6 @@ function update-node-label() {
done
}
# A helper function that sets file permissions for kube-controller-manager to
# run as non root.
# User and group should never contain characters that need to be quoted
# shellcheck disable=SC2086
function run-kube-controller-manager-as-non-root {
prepare-log-file /var/log/kube-controller-manager.log ${KUBE_CONTROLLER_MANAGER_RUNASUSER}
setfacl -m u:${KUBE_CONTROLLER_MANAGER_RUNASUSER}:r "${CA_CERT_BUNDLE_PATH}"
setfacl -m u:${KUBE_CONTROLLER_MANAGER_RUNASUSER}:r "${SERVICEACCOUNT_CERT_PATH}"
setfacl -m u:${KUBE_CONTROLLER_MANAGER_RUNASUSER}:r "${SERVICEACCOUNT_KEY_PATH}"
}
# Starts kubernetes controller manager.
# It prepares the log file, loads the docker image, calculates variables, sets them
# in the manifest file, and then copies the manifest file to /etc/kubernetes/manifests.
@@ -2073,7 +2061,7 @@ function start-kube-controller-manager {
fi
echo "Start kubernetes controller-manager"
create-kubeconfig "kube-controller-manager" "${KUBE_CONTROLLER_MANAGER_TOKEN}"
prepare-log-file /var/log/kube-controller-manager.log
prepare-log-file /var/log/kube-controller-manager.log "${KUBE_CONTROLLER_MANAGER_RUNASUSER:-0}"
# Calculate variables and assemble the command line.
local params=("${CONTROLLER_MANAGER_TEST_LOG_LEVEL:-"--v=2"}" "${CONTROLLER_MANAGER_TEST_ARGS:-}" "${CLOUD_CONFIG_OPT}")
local config_path='/etc/srv/kubernetes/kube-controller-manager/kubeconfig'
@@ -2162,12 +2150,13 @@ function start-kube-controller-manager {
sed -i -e "s@{{cpurequest}}@${KUBE_CONTROLLER_MANAGER_CPU_REQUEST}@g" "${src_file}"
if [[ -n "${KUBE_CONTROLLER_MANAGER_RUNASUSER:-}" && -n "${KUBE_CONTROLLER_MANAGER_RUNASGROUP:-}" ]]; then
run-kube-controller-manager-as-non-root
sed -i -e "s@{{runAsUser}}@${KUBE_CONTROLLER_MANAGER_RUNASUSER}@g" "${src_file}"
sed -i -e "s@{{runAsGroup}}@${KUBE_CONTROLLER_MANAGER_RUNASGROUP}@g" "${src_file}"
sed -i -e "s@{{runAsUser}}@\"runAsUser\": ${KUBE_CONTROLLER_MANAGER_RUNASUSER},@g" "${src_file}"
sed -i -e "s@{{runAsGroup}}@\"runAsGroup\":${KUBE_CONTROLLER_MANAGER_RUNASGROUP},@g" "${src_file}"
sed -i -e "s@{{supplementalGroups}}@\"supplementalGroups\": [ ${KUBE_PKI_READERS_GROUP} ],@g" "${src_file}"
else
sed -i -e "s@{{runAsUser}}@0@g" "${src_file}"
sed -i -e "s@{{runAsGroup}}@0@g" "${src_file}"
sed -i -e "s@{{runAsUser}}@@g" "${src_file}"
sed -i -e "s@{{runAsGroup}}@@g" "${src_file}"
sed -i -e "s@{{supplementalGroups}}@@g" "${src_file}"
fi
cp "${src_file}" /etc/kubernetes/manifests

4
cluster/gce/gci/configure-kubeapiserver.sh
View File

@@ -278,7 +278,7 @@ function start-kube-apiserver {
params+=" --advertise-address=${MASTER_ADVERTISE_ADDRESS}"
if [[ -n "${PROXY_SSH_USER:-}" ]]; then
if [[ -n "${KUBE_API_SERVER_RUNASUSER:-}" && -n "${KUBE_API_SERVER_RUNASGROUP:-}" ]]; then
chown -R "${KUBE_API_SERVER_RUNASUSER}":"${KUBE_API_SERVER_RUNASGROUP}" /etc/srv/sshproxy/
chown "${KUBE_API_SERVER_RUNASUSER}":"${KUBE_API_SERVER_RUNASGROUP}" /etc/srv/sshproxy
fi
params+=" --ssh-user=${PROXY_SSH_USER}"
params+=" --ssh-keyfile=/etc/srv/sshproxy/.sshkeyfile"
@@ -287,7 +287,7 @@ function start-kube-apiserver {
local -r vm_external_ip=$(get-metadata-value "instance/network-interfaces/0/access-configs/0/external-ip")
if [[ -n "${PROXY_SSH_USER:-}" ]]; then
if [[ -n "${KUBE_API_SERVER_RUNASUSER:-}" && -n "${KUBE_API_SERVER_RUNASGROUP:-}" ]]; then
chown -R "${KUBE_API_SERVER_RUNASUSER}":"${KUBE_API_SERVER_RUNASGROUP}" /etc/srv/sshproxy/
chown "${KUBE_API_SERVER_RUNASUSER}":"${KUBE_API_SERVER_RUNASGROUP}" /etc/srv/sshproxy
fi
params+=" --advertise-address=${vm_external_ip}"
params+=" --ssh-user=${PROXY_SSH_USER}"

7
cluster/gce/manifests/kube-controller-manager.manifest
View File

@@ -11,11 +11,12 @@
},
"spec":{
"securityContext": {
{{runAsUser}}
{{runAsGroup}}
{{supplementalGroups}}
"seccompProfile": {
"type": "RuntimeDefault"
},
"runAsUser": {{runAsUser}},
"runAsGroup": {{runAsGroup}}
}
},
"priorityClassName": "system-node-critical",
"priority": 2000001000,