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environment_check.sh: check the hostname uniqueness

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Longhorn 5012

Signed-off-by: Derek Su <derek.su@suse.com>
This commit is contained in:
Derek Su 2022-12-07 16:08:29 +08:00 committed by David Ko
parent 13ac2a6641
commit 939ac11774
1 changed files with 69 additions and 35 deletions
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104
scripts/environment_check.sh
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@ -1,5 +1,8 @@
#!/bin/bash
######################################################
# Log
######################################################
export RED='\x1b[0;31m'
export GREEN='\x1b[38;5;22m'
export CYAN='\x1b[36m'
@ -67,17 +70,9 @@ error() {
fi
}
detect_node_os()
{
local pod="$1"
OS=`kubectl exec -i $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c 'grep -E "^ID_LIKE=" /etc/os-release | cut -d= -f2'`
if [[ -z "${OS}" ]]; then
OS=`kubectl exec -i $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c 'grep -E "^ID=" /etc/os-release | cut -d= -f2'`
fi
echo "$OS"
}
######################################################
# Check logics
######################################################
set_packages_and_check_cmd()
{
case $OS in
@ -110,23 +105,37 @@ set_packages_and_check_cmd()
esac
}
check_dependencies() {
detect_node_os()
{
local pod="$1"
OS=`kubectl exec -i $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c 'grep -E "^ID_LIKE=" /etc/os-release | cut -d= -f2'`
if [[ -z "${OS}" ]]; then
OS=`kubectl exec -i $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c 'grep -E "^ID=" /etc/os-release | cut -d= -f2'`
fi
echo "$OS"
}
check_local_dependencies() {
local targets=($@)
local allFound=true
local all_found=true
for ((i=0; i<${#targets[@]}; i++)); do
local target=${targets[$i]}
if [ "$(which $target)" == "" ]; then
allFound=false
all_found=false
error "Not found: $target"
fi
done
if [ "$allFound" == "false" ]; then
error "Please install missing dependencies."
if [ "$all_found" == "false" ]; then
msg="Please install missing dependencies: ${targets[@]}."
info "$msg"
exit 2
else
info "Required dependencies are installed."
fi
msg="Required dependencies '${targets[@]}' are installed."
info "$msg"
}
create_ds() {
@ -215,9 +224,9 @@ check_mount_propagation() {
}
check_package_installed() {
local pods=$(kubectl get pods -o name | grep longhorn-environment-check)
local pods=$(kubectl get pods -o name -l app=longhorn-environment-check)
local allFound=true
local all_found=true
for pod in ${pods}; do
OS=`detect_node_os $pod`
@ -233,70 +242,95 @@ check_package_installed() {
kubectl exec -i $pod -- nsenter --mount=/proc/1/ns/mnt -- timeout 30 bash -c "$CHECK_CMD $package" > /dev/null 2>&1
if [ $? != 0 ]; then
allFound=false
all_found=false
node=`kubectl get ${pod} --no-headers -o=custom-columns=:.spec.nodeName`
error "$package is not found in $node."
fi
done
done
if [ "$allFound" == "false" ]; then
if [ "$all_found" == "false" ]; then
error "Please install missing packages."
exit 2
else
info "Required packages are installed."
fi
info "Required packages are installed."
}
check_hostname_uniqueness() {
hostnames=$(kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="Hostname")].address}')
declare -A deduplicate_hostnames
num_nodes=0
for hostname in ${hostnames}; do
num_nodes=$((num_nodes+1))
deduplicate_hostnames["${hostname}"]="${hostname}"
done
if [ "${#deduplicate_hostnames[@]}" != "${num_nodes}" ]; then
error "Nodes do not have unique hostnames."
exit 2
fi
info "Hostname uniqueness check is passed."
}
check_multipathd() {
local pods=$(kubectl get pods -o name | grep longhorn-environment-check)
local allNotFound=true
local pods=$(kubectl get pods -o name -l app=longhorn-environment-check)
local all_not_found=true
for pod in ${pods}; do
kubectl exec -t $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c "systemctl status --no-pager multipathd.service" > /dev/null 2>&1
if [ $? = 0 ]; then
allNotFound=false
all_not_found=false
node=`kubectl get ${pod} --no-headers -o=custom-columns=:.spec.nodeName`
warn "multipathd is running on $node."
fi
done
if [ "$allNotFound" == "false" ]; then
if [ "$all_not_found" == "false" ]; then
warn "multipathd would probably result in the Longhorn volume mount failure. Please refer to https://longhorn.io/kb/troubleshooting-volume-with-multipath for more information."
fi
}
check_iscsid() {
local pods=$(kubectl get pods -o name | grep longhorn-environment-check)
local allFound=true
local pods=$(kubectl get pods -o name -l app=longhorn-environment-check)
local all_found=true
for pod in ${pods}; do
kubectl exec -t $pod -- nsenter --mount=/proc/1/ns/mnt -- bash -c "systemctl status --no-pager iscsid.service" > /dev/null 2>&1
if [ $? != 0 ]; then
allFound=false
all_found=false
node=`kubectl get ${pod} --no-headers -o=custom-columns=:.spec.nodeName`
error "iscsid is not running on $node."
fi
done
if [ "$allFound" == "false" ]; then
if [ "$all_found" == "false" ]; then
exit 2
fi
}
DEPENDENCIES=(kubectl jq mktemp)
check_dependencies ${DEPENDENCIES[@]}
######################################################
# Main logics
######################################################
DEPENDENCIES=("kubectl" "jq" "mktemp")
check_local_dependencies "${DEPENDENCIES[@]}"
# Check the each host has a unique hostname (for RWX volume)
check_hostname_uniqueness
# Create a daemonset for checking the requirements in each node
TEMP_DIR=$(mktemp -d)
trap cleanup EXIT
create_ds
wait_ds_ready
check_package_installed
check_iscsid
check_multipathd
check_mount_propagation
exit 0