Created
September 12, 2019 13:05
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Workaround for https://github.com/pingcap/tidb-operator/issues/903
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| #!/bin/bash | |
| set -o errexit | |
| set -o errtrace | |
| set -o nounset | |
| set -o pipefail | |
| #set -x | |
| function script_usage() { | |
| cat << EOF | |
| Usage: | |
| query_all_tidb [Flags] [SQL query to run] | |
| Flags: | |
| -h|--help Displays this help | |
| -n|--namespace Specifies the kubernetes namespace | |
| -u|--username Specifies the TiDB username (default: root) | |
| -p|--password Specifies the TiDB password | |
| Note: | |
| Assumes the following: | |
| - kubectl is installed | |
| - mysql installed | |
| - GNU compatible getopt is installed (gnu-getopt on OS X) | |
| - Port 4000 is available on localhost | |
| EOF | |
| } | |
| # Set the following to the GNU compatible getopt on your system | |
| GNU_GETOPT=gnu-getopt | |
| ! ${GNU_GETOPT} --test > /dev/null | |
| if [[ ${PIPESTATUS[0]} -ne 4 ]]; then | |
| echo 'getopt --test failed in this environment.' | |
| exit 1 | |
| fi | |
| # Parse the arguments | |
| OPTIONS=hn:u:p: | |
| LONGOPTS=help,namespace:,username:,password: | |
| ! PARSED=$(${GNU_GETOPT} --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@") | |
| if [[ ${PIPESTATUS[0]} -ne 0 ]]; then | |
| # e.g. return value is 1 | |
| # then getopt has complained about wrong arguments to stdout | |
| exit 2 | |
| fi | |
| eval set -- "$PARSED" | |
| H=n NS=- UN=root PW=- | |
| # parse the options in order until we see -- | |
| while true; do | |
| case "$1" in | |
| -h|--help) | |
| H=y | |
| shift | |
| ;; | |
| -n|--namespace) | |
| NS="$2" | |
| shift 2 | |
| ;; | |
| -u|--username) | |
| UN="$2" | |
| shift 2 | |
| ;; | |
| -p|--password) | |
| PW="$2" | |
| shift 2 | |
| ;; | |
| --) | |
| shift | |
| break | |
| ;; | |
| *) | |
| echo "Parsing error at $1" | |
| exit 3 | |
| ;; | |
| esac | |
| done | |
| # Help takes precedence | |
| if [[ "$H" == "y" ]]; then | |
| script_usage | |
| exit 0 | |
| fi | |
| # handle non-option arguments | |
| if [[ $# -lt 1 ]]; then | |
| echo "$0: SQL query is required." | |
| exit 4 | |
| fi | |
| IN="$@" | |
| ### MAIN ### | |
| if [[ ${NS} != "-" ]]; then | |
| ALL_TIDBS=$(kubectl get pods -n "${NS}" -l app.kubernetes.io/component=tidb | tail -n +2 | awk '{print $1}') | |
| else | |
| ALL_TIDBS=$(kubectl get pods -l app.kubernetes.io/component=tidb | tail -n +2 | awk '{print $1}') | |
| fi | |
| for tidb_pod in ${ALL_TIDBS}; do | |
| echo "Connecting to ${tidb_pod}" | |
| if [[ ${NS} != "-" ]]; then | |
| kubectl port-forward "${tidb_pod}" 4000:4000 -n "${NS}" & | |
| else | |
| kubectl port-forward "${tidb_pod}" 4000:4000 & | |
| fi | |
| port_forward_pid=${!} | |
| # Wait for port-forwarding to be ready | |
| sleep 2 | |
| if [[ ${PW} != "-" ]]; then | |
| mysql -h 127.0.0.1 -P 4000 -u "${UN}" -p "${PW}" -e "${IN}" | |
| else | |
| mysql -h 127.0.0.1 -P 4000 -u "${UN}" -e "${IN}" | |
| fi | |
| kill -INT ${port_forward_pid} | |
| # sleep 1 | |
| done |
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