1 files changed, 92 insertions, 0 deletions
diff --git a/kubernetes/common/cassandra/resources/config/docker-entrypoint.sh b/kubernetes/common/cassandra/resources/config/docker-entrypoint.sh
new file mode 100644
index 0000000000..5b652228a6
--- /dev/null
+++ b/kubernetes/common/cassandra/resources/config/docker-entrypoint.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+set -e
+
+# first arg is `-f` or `--some-option`
+# or there are no args
+if [ "$#" -eq 0 ] || [ "${1#-}" != "$1" ]; then
+        set -- cassandra -f "$@"
+fi
+
+# allow the container to be started with `--user`
+if [ "$1" = 'cassandra' -a "$(id -u)" = '0' ]; then
+        find /var/lib/cassandra /var/log/cassandra "$CASSANDRA_CONFIG" \
+                \! -user cassandra -exec chown cassandra '{}' +
+        exec gosu cassandra "$BASH_SOURCE" "$@"
+fi
+
+_ip_address() {
+        # scrape the first non-localhost IP address of the container
+        # in Swarm Mode, we often get two IPs -- the container IP, and the (shared) VIP, and the container IP should always be first
+        ip address | awk '
+                $1 == "inet" && $NF != "lo" {
+                        gsub(/\/.+$/, "", $2)
+                        print $2
+                        exit
+                }
+        '
+}
+
+# "sed -i", but without "mv" (which doesn't work on a bind-mounted file, for example)
+_sed-in-place() {
+        local filename="$1"; shift
+        local tempFile
+        tempFile="$(mktemp)"
+        sed "$@" "$filename" > "$tempFile"
+        cat "$tempFile" > "$filename"
+        rm "$tempFile"
+}
+
+if [ "$1" = 'cassandra' ]; then
+        : ${CASSANDRA_RPC_ADDRESS='0.0.0.0'}
+
+        : ${CASSANDRA_LISTEN_ADDRESS='auto'}
+        if [ "$CASSANDRA_LISTEN_ADDRESS" = 'auto' ]; then
+                CASSANDRA_LISTEN_ADDRESS="$(_ip_address)"
+        fi
+
+        : ${CASSANDRA_BROADCAST_ADDRESS="$CASSANDRA_LISTEN_ADDRESS"}
+
+        if [ "$CASSANDRA_BROADCAST_ADDRESS" = 'auto' ]; then
+                CASSANDRA_BROADCAST_ADDRESS="$(_ip_address)"
+        fi
+        : ${CASSANDRA_BROADCAST_RPC_ADDRESS:=$CASSANDRA_BROADCAST_ADDRESS}
+
+        if [ -n "${CASSANDRA_NAME:+1}" ]; then
+                : ${CASSANDRA_SEEDS:="cassandra"}
+        fi
+        : ${CASSANDRA_SEEDS:="$CASSANDRA_BROADCAST_ADDRESS"}
+
+        _sed-in-place "$CASSANDRA_CONFIG/cassandra.yaml" \
+                -r 's/(- seeds:).*/\1 "'"$CASSANDRA_SEEDS"'"/'
+
+        for yaml in \
+                broadcast_address \
+                broadcast_rpc_address \
+                cluster_name \
+                endpoint_snitch \
+                listen_address \
+                num_tokens \
+                rpc_address \
+                start_rpc \
+                authenticator \
+        ; do
+                var="CASSANDRA_${yaml^^}"
+                val="${!var}"
+                if [ "$val" ]; then
+                        _sed-in-place "$CASSANDRA_CONFIG/cassandra.yaml" \
+                                -r 's/^(# )?('"$yaml"':).*/\2 '"$val"'/'
+                fi
+        done
+
+        for rackdc in dc rack; do
+                var="CASSANDRA_${rackdc^^}"
+                val="${!var}"
+                if [ "$val" ]; then
+                        _sed-in-place "$CASSANDRA_CONFIG/cassandra-rackdc.properties" \
+                                -r 's/^('"$rackdc"'=).*/\1 '"$val"'/'
+                fi
+        done
+fi
+
+exec "$@"
+